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Development and validation of a table tennis serve skill assessment instrument for junior high school students: A psychometric approach
Muhammad Aliffajaruddin Alfani1, M. E. Winarno2, Siti Nurrochmah31. State University of Malang , ID2. State University of Malang , ID3. State University of Malang , ID2025-07-01|page 95-102AbstractBackground: The highest assessment weight in physical education lessons lies in psychomotor skills. In order to find out how far the competencies possessed by students, a clear and comprehensive assessment tool or instrument is needed.
Objectives: The research aims to develop a test instrument for forehand and backhand service skills in table tennis small ball games.
Methods: The development of this instrument uses a research and development scheme, with predetermined steps (1) determining objectives, (2) analyzing literature, (3) developing specifications, (4) administering, (5) conducting tests, (6) analyzing data validity, reliability, and objectivity. The cluster sampling procedure was conducted on students aged 13-15 who met the inclusion criteria, involving junior high school students (n=80), consisting of 41 female students and 39 male students. Data were analyzed using IBM SPSS Statistics version 11.0. The basis for decision-making is the Pearson correlation test. The analysis technique in the reliability test uses a test and retest external estimation approach.
Results: The forehand serve variable has a calculated r-value of 0.456> r-table 0.312, and the backhand serve variable obtained a calculated R-value of 0.352> r-table 0.312, so the table tennis skill instrument on that variable was declared valid. At the same time, the reliability test shows a value above 0.70; the instrument that has been prepared can be declared reliable.
Conclusions: The assessment instrument for forehand and backhand serve skills in table tennis games for junior high school students has met the validity and reliability criteria. This shows that the instrument is suitable for teachers as an objective and consistent measuring tool in evaluating basic table tennis skills in students. Recommendations for future studies are encouraged to expand the sample size and integrate digital features to enhance the scalability and objectivity of the assessment.
APA Citation StyleAlfani, M. A. , Winarno, M. E. , & Nurrochmah, S. (2025). Development and validation of a table tennis serve skill assessment instrument for junior high school students: A psychometric approach. Physical Education and Sports: Studies and Research, 95-102. https://doi.org/10.56003/pessr.v4i2.525 -
An analysis of anxiety levels among volleyball athletes during a provincial inter-club tournament in Jakarta, Indonesia
Rea Rizkita Raga1, Yunita Lasma21. Universitas Islam 45 Bekasi , ID2. Universitas Islam 45 Bekasi , ID2025-07-27|page 175-185AbstractBackground: Competitive anxiety is a key psychological factor that can significantly affect an athlete's performance. In volleyball, high-pressure situations often lead to anxiety, potentially hindering players' ability to perform optimally.
Objectives: This study aims to assess the levels of anxiety experienced by volleyball athletes competing in the Special Capital Region Jakarta Inter-Club Provincial Championship.
Methods: A descriptive quantitative design was used, with data collected through a survey involving 70 volleyball athletes. The instrument used was a 35-item anxiety questionnaire categorized into two phases: before the match (18 items) and during the match (17 items). Responses were measured using a 5-point Likert scale. Validity testing confirmed all items were valid, and the instrument showed high reliability (α = 0.954), as analyzed using SPSS 23.
Results: During the match, 35.7% of athletes experienced high anxiety, while 64.3% showed low anxiety. Prior to the match, 44.3% reported high anxiety and 55.7% reported low anxiety. Overall, 36.6% of athletes showed high anxiety levels, while 61.4% displayed low levels. These results indicate that most athletes have relatively good emotional regulation abilities in competitive situations.
Conclusions: The study underscores the critical role of psychological readiness in athletic performance. Coaches and policymakers are encouraged to integrate structured mental training programs into athlete development. Future research should explore variables contributing to anxiety, such as playing position, competitive experience, and demographic factors like age and gender.
APA Citation StyleRaga, R. R. , & Lasma, Y. (2025). An analysis of anxiety levels among volleyball athletes during a provincial inter-club tournament in Jakarta, Indonesia. Physical Education and Sports: Studies and Research, 175-185. https://doi.org/10.56003/pessr.v4i2.605 -
Associations of lower limb muscle strength and body reaction time with crescent kick performance in competitive pencak silat athletes
Jery Setiawan1, Siti Baitul Mukarromah21. State University of Semarang , ID2. State University of Semarang , ID2026-08-17|page 208-219AbstractBackground: Crescent kick performance is an important technical component of competitive pencak silat and may be associated with physical capacities such as lower limb muscle strength and reaction time. However, evidence regarding the relationships of these physical characteristics with crescent kick performance remains limited.
Objectives: This study aimed to examine the associations of lower limb muscle strength and body reaction time with crescent kick performance among competitive pencak silat athletes.
Methods: This quantitative correlational study involved 30 competitive pencak silat athletes (age: 19.8 ± 2.1 years; height: 168.4 ± 6.3 cm; body mass: 61.7 ± 8.2 kg; body mass index: 21.7 ± 2.3 kg/m²) recruited using total sampling. Lower limb muscle strength was assessed using a leg dynamometer, body reaction time using a reaction timer, and crescent kick performance using a 10-second crescent kick test. Data were analyzed using descriptive statistics, Pearson correlation, and multiple correlation analysis, with statistical significance set at p < .05.
Results: Lower limb muscle strength was positively associated with crescent kick performance (r = 0.734, p < .001), whereas body reaction time was negatively associated with crescent kick performance (r = -0.739, p < .001), indicating that shorter reaction times were associated with better kick performance. Multiple correlation analysis showed a strong combined association of lower limb muscle strength and body reaction time with crescent kick performance (R = 0.754, R² = 0.568, p < .001). Together, these variables accounted for 56.8% of the variance in crescent kick performance.
Conclusions: Greater lower limb muscle strength and shorter body reaction time were associated with better crescent kick performance among competitive pencak silat athletes. These findings highlight the relevance of muscular strength and neuromuscular responsiveness to crescent kick performance and may inform physical conditioning programs for pencak silat athletes. Further studies with larger samples and additional biomechanical, physiological, and technical measures are needed to better understand the factors associated with crescent kick performance.
APA Citation StyleSetiawan, J. , & Mukarromah, S. B. (2026). Associations of lower limb muscle strength and body reaction time with crescent kick performance in competitive pencak silat athletes. Physical Education and Sports: Studies and Research, 208-219. https://doi.org/10.56003/pessr.v5i2.762 -
An Examination of Meaningful Experiences During Sport Education
Ali Nasser Alshuraymi1, Peter Hastie21. College of Education, King Saud University, Riyadh , SA2. Auburn University , US2024-04-30|page 46-56AbstractBackground: In recent research years, there has been an increasing focus on the meaningfulness of physical education experiences. While it has been suggested that certain curriculum models such as sport education or cooperative learning provide opportunities for meaningful engagement in physical education, to date there has been no empirical study of those claims.
Objectives: The purpose of this study was to quantitatively examine students’ perceptions of meaningfulness in two physical education contexts: traditional multi-activity format, and sport education.
Methods: Sixty seventh-grade students aged 12 to 14 completed a 20-item survey titled "Meaningful Experiences in Physical Education Survey (MEPES)" prior to and at the completion of one of three sport education seasons. The analysis consisted of independent samples t-test comparisons between the two contexts (previous physical education experiences, and sport education) for each of the five dimensions of meaningfulness. A Pearson correlation was conducted to examine if there were significant relationships between the five dimensions.
Results: Results of the independent samples t-test showed that significantly higher levels of meaningfulness were identified from participation in sport education than in previous physical education for four of the five dimensions. Pearson's coefficient results indicated significant positive correlations between all five meaningfulness dimensions.
Conclusion: Sport education has structural elements that promote a sense of meaningfulness within physical education.
APA Citation StyleAlshuraymi, A. N. , & Hastie, P. (2024). An Examination of Meaningful Experiences During Sport Education. Physical Education and Sports: Studies and Research, 46-56. https://doi.org/10.56003/pessr.v3i1.355 -
Weightlifting coaches' and athletes' understanding of injury prevention programs: a case study of Lumajang and Malang
Muhammad Izzan Atmagara1, Yulingga Nanda Hanief21. State University of Malang , ID2. State University of Malang , ID2025-09-21|page 222-235AbstractBackground: Weightlifting is a high-intensity sport with a high risk of injuries due to improper technique, insufficient warm-up, and excessive training loads.
Objectives: This study explores the understanding, strategies, and barriers of weightlifting coaches and athletes in Lumajang District and Malang City related to implementing injury prevention programs in performance sports.
Methods: This study used a qualitative case study approach. Participants were selected using purposive sampling, consisting of weightlifting coaches with at least one year of experience and athletes who had trained and competed at the regional level. Data were collected through interviews, observations, and document analysis, while data were analyzed using the Miles and Huberman model, including reduction, presentation, and conclusion.
Results: The results showed that coaches and athletes emphasized dynamic warm-ups, core and back strengthening exercises, and correct lifting techniques as the main strategies to prevent injuries. However, limitations in facilities, literature access, and training variety were identified as barriers to implementing optimal injury prevention programs.
Conclusions: This study concludes that effective injury prevention in weightlifting requires structured warm-up routines, individualized training programs, and adequate supporting equipment. Strengthening coaches’ knowledge and providing better facilities are crucial to minimize injuries and enhance athlete performance.APA Citation StyleAtmagara, M. I. , & Hanief, Y. N. (2025). Weightlifting coaches' and athletes' understanding of injury prevention programs: a case study of Lumajang and Malang. Physical Education and Sports: Studies and Research, 222-235. https://doi.org/10.56003/pessr.v4i2.601 -
Medical observations and injury analysis: All Girls Touch Rugby Championship 2024
Mohamad Nizam Nazarudin1, Yong Qin Tan2, Ardo Okilanda3, Yovhandra Ockta4, Reshandi Nugraha51. National University of Malaysia , MY2. National University of Malaysia , MY3. State University of Padang , ID4. Universitas Teuku Umar , ID5. UniversitasPendidikan Indonesia , ID2025-04-04|page 32-45AbstractBackground: Touch rugby is a high-intensity, non-contact sport requiring agility, speed, and coordination. This study analyzes injury distribution, treatment effectiveness, and preventive measures among youth touch rugby players.
Objectives: This study examined injury patterns among adolescent female athletes during the 2024 All-Girls Touch Rugby Championship (AGTR 2024).
Methods: A retrospective observational study was conducted using medical reports from the two-day All-Girls Touch Rugby Championship 2024 (AGTR 2024) at Universiti Putra Malaysia. The study examined 484 female athletes (ages 9–18 years), with 176 injuries recorded and categorized as soft tissue injuries (52.3%), abrasions (23.9%), and sprains (14.2%). Descriptive statistics were used to assess injury distribution, while chi-square analysis (χ² = 10.45, p < 0.01) evaluated the relationship between injury type and age group.
Results: Younger players (10–14 years) sustained more abrasions (60%), whereas older athletes (15–18 years) had a higher incidence of soft tissue injuries (68%). Injuries increased by 66.7% on Day 2, highlighting the impact of cumulative fatigue and tournament intensity. Ice therapy (68%) and bandaging (55%) were the most utilized treatments, with only 7% of cases requiring outpatient referrals.
Conclusions: Findings underscore the need for structured warm-ups, enhanced hydration protocols, and targeted strength training to reduce injury risks. The study emphasizes the role of injury surveillance, playing surface improvements, and gender-specific training programs in preventing injuries and enhancing athlete safety. Implementing evidence-based preventive strategies can promote the long-term development and sustainability of touch rugby for adolescent athletes. Future research should focus on longitudinal injury tracking and tailored intervention strategies.
APA Citation StyleNazarudin, M. N. , Tan, Y. Q. , Okilanda, A. , Ockta, Y. , & Nugraha, R. (2025). Medical observations and injury analysis: All Girls Touch Rugby Championship 2024. Physical Education and Sports: Studies and Research, 32-45. https://doi.org/10.56003/pessr.v4i1.495 -
Mislabeling latent variables in factor analysis applied to football playing style research: A commentary
Spyridon Plakias11. Department of Physical Education and Sports, University of Thessaly , GR2026-03-25|page 40-46AbstractThe application of exploratory factor analysis and principal component analysis (PCA) has become increasingly prevalent in football analytics, offering a robust framework for identifying and quantifying playing styles. By condensing a large set of performance indicators into factors, these techniques provide valuable insights into tactical patterns. However, a persistent challenge lies in the subjective labeling of these factors, which can lead to ambiguous or misleading interpretations. This commentary highlights the issue of mislabeling latent variables in football playing style research, drawing on examples from recent studies to illustrate how inaccurate labels can distort both theoretical understanding and practical applications. The implications of poor labeling extend beyond academic discourse, potentially affecting coaches and analysts who rely on data-driven insights for tactical planning. To address these challenges, we propose best practice recommendations emphasizing conceptual clarity, standardized terminology, and expert validation. Accurate and consistent factor labeling is essential to ensure the reliability, comparability, and practical relevance of findings in the evolving field of football performance analysis.
APA Citation StylePlakias, S. (2026). Mislabeling latent variables in factor analysis applied to football playing style research: A commentary. Physical Education and Sports: Studies and Research, 40-46. https://doi.org/10.56003/pessr.v5i1.693 -
Predictors of cardiorespiratory endurance in martial arts athletes: A path analysis of body composition, hemoglobin, and motivation
Novanto Ponco Nugroho 1, Dani Nur Riyadi2, Aridhotul Haqiyah31. Universitas Islam 45 Bekasi , ID2. Universitas Islam 45 Bekasi , ID3. Universitas Islam 45 Bekasi , ID2025-07-01|page 83-94AbstractBackground: Cardiorespiratory endurance is vital to athletic performance, particularly in sports requiring sustained physical exertion such as martial arts.
Objectives: This study examined the predictive roles of body composition (BMI), hemoglobin concentration, and motivation on cardiorespiratory endurance among university-level martial arts athletes.
Methods: Using a quantitative path analysis design, data were collected from 20 purposively selected martial arts athletes who regularly trained. Cardiorespiratory endurance was assessed via the multistage fitness test, BMI was calculated using standard anthropometric measures, hemoglobin was measured using the Harenz scale, and motivation was evaluated with a validated Likert-scale questionnaire.
Results: The analysis showed that BMI (ρ = 0.705, t = 3.071, p = 0.007) and hemoglobin concentration (ρ = 0.946, t = 4.672, p < 0.001) had significant positive effects on cardiorespiratory endurance. Motivation, however, did not have a significant direct effect (ρ = 0.087, t = 0.853, p = 0.203). Additionally, BMI correlated positively with both hemoglobin (ρ = 0.923, p < 0.001) and motivation (ρ = 0.670, p = 0.034), suggesting indirect effects through physiological mechanisms.
Conclusions: The findings underscore that physiological indicators, specifically BMI and hemoglobin, are more critical predictors of aerobic capacity than psychological factors like motivation in this athletic population. Due to sport-specific demands, these results may not be generalizable to non-martial arts athletes. Future studies should incorporate additional mediators such as training intensity and account for potential self-report bias in motivation assessments.
APA Citation StyleNugroho , N. P. , Riyadi, D. N. , & Haqiyah, A. (2025). Predictors of cardiorespiratory endurance in martial arts athletes: A path analysis of body composition, hemoglobin, and motivation. Physical Education and Sports: Studies and Research, 83-94. https://doi.org/10.56003/pessr.v4i2.559 -
The relationship between arm length and body mass index (BMI) with turbo-throwing performance in elementary school students
Awaliyah Riskyta Putri1, Siti Nurrochmah21. State University of Malang , ID2. State University of Malang , ID2025-07-01|page 115-124AbstractBackground: This research is motivated by insufficient scientific research that specifically examines the relationship between arm length and Body Mass Index (BMI) on turbo throwing performance in elementary school students, especially in preparation for the National Student Sports Olympics (O2SN).
Objectives: This study examines the relationship between arm length and BMI and the turbo-throwing performance of sixth-grade students of State Elementary School Bunulrejo 1 Malang in preparation for the National Student Sports Olympics (O2SN) in 2025.
Methods: The method used is a quantitative descriptive design with a correlational study. The study population comprised 71 male students, with a sample of 45 male students. The research instrument was a turbo-throwing basic motion performance test, arm length measurement, and Body Mass Index (BMI) measurement. The analysis technique uses inferential statistics in the form of multiple correlation analysis, which is complemented by multiple regression analysis.
Results: The results were obtained using inferential statistics through multiple correlation analysis. The results of the multiple correlation test obtained a coefficient value = 0.723 and Sig. P = 0.001 < a = 0.05, and the contribution of the variable effectiveness of arm's length to turbo-throwing performance is 46.3%, while BMI is 5.9%, so the variables arm length and BMI provide an effective contribution of 52.2%.
Conclusions: Arm length and BMI significantly influence turbo-throwing performance. Arm length is the most dominant factor. These results can be a reference for teachers and coaches when selecting O2SNs and coaching athletes at the basic education level. Future researchers are expected to examine other variables that have not been studied to provide a more comprehensive picture of turbo-throwing performance.
APA Citation StylePutri, A. R. , & Nurrochmah, S. (2025). The relationship between arm length and body mass index (BMI) with turbo-throwing performance in elementary school students. Physical Education and Sports: Studies and Research, 115-124. https://doi.org/10.56003/pessr.v4i2.563 -
Impact of plyometric training using step-up and lateral box jumps on the improvement of leg muscle power in youth school futsal athletes
Risky Sandy Kurniawan1, Donny Anhar Fahmi2, Setiyawan Setiyawan31. Universitas PGRI Semarang , ID2. Universitas PGRI Semarang , ID3. Universitas PGRI Semarang , ID2025-08-15|page 212-221AbstractBackground: Futsal is a high-intensity sport that requires leg muscle power, especially in aerial duels, anticipating the ball, and performing powerful kicks. Limited jumping ability can reduce leg muscle power and overall performance.
Objectives: This study aims to test the impact of plyometric training using step-up and lateral box jumps on the improvement of leg muscle power in youth school futsal athletes.
Methods: A quasi-experimental single-group pretest-posttest design was conducted with 40 male participants over a four-week plyometric training program. Leg muscle power was measured using a vertical jump test before and after the intervention. Data were analyzed using a t-test with the assistance of SPSS.
Results: Both step-up and lateral box jumps significantly increased leg muscle power (p < 0.05). The step-up group showed an average increase of 4.20 cm, while the lateral box jump group showed an average increase of 3.45 cm, with no statistically significant difference (p = 0.326).
Conclusions: Both training methods effectively enhance leg muscle power and can be integrated into school-based futsal training programs to improve performance.
APA Citation StyleKurniawan, R. S. , Fahmi, D. A. , & Setiyawan, S. (2025). Impact of plyometric training using step-up and lateral box jumps on the improvement of leg muscle power in youth school futsal athletes. Physical Education and Sports: Studies and Research, 212-221. https://doi.org/10.56003/pessr.v4i2.611 -
Comparative analysis of plantar pressure distribution among football players across playing positions: A cross-sectional study
Arif Pristianto1, Anindya Maghfira Zain2, Farid Rahman3, Pungki Indarto4, Anugrah Nur Warthadi51. Department of Physiotherapy, Faculty of Health Sciences, Universitas Muhammadiyah Surakarta , ID2. Department of Physiotherapy, Faculty of Health Sciences, Universitas Muhammadiyah Surakarta , ID3. Department of Physiotherapy, Faculty of Health Sciences, Universitas Muhammadiyah Surakarta , ID4. Department of Sport Education, Faculty of Teacher Training and Education, Universitas Muhammadiyah Surakarta , ID5. Department of Sport Education, Faculty of Teacher Training and Education, Universitas Muhammadiyah Surakarta , ID2026-04-01|page 68-81AbstractBackground: Football players exhibit different muscle activation patterns during different playing activities, which can affect plantar pressure on the feet. Uneven, unbalanced plantar pressure distribution can cause muscle tension, leading to musculoskeletal injuries in the feet.
Objectives: This study aims to determine and compare plantar pressure distribution among football players based on playing position.
Methods: This study is an analytical observational study using a cross-sectional approach. The sample in this study consisted of 24 football players aged 15-18 years who met the inclusion criteria. Plantar pressure was measured using a Zebris Force Distribution Measurement (FDM) platform on the forefoot and rearfoot areas. Statistical analysis included normality tests (Shapiro-Wilk) and multivariate tests (ANOVA) according to data distribution.
Results: Differences in plantar pressure were observed between defenders, forwards, and strikers in static conditions (p < 0.05), but not in dynamic conditions (p > 0.05).
Conclusions: This study shows differences in plantar pressure distribution among football players in defender, forward, and striker positions under static conditions. However, under dynamic conditions, no significant differences were found among playing positions.
APA Citation StylePristianto, A. , Zain, A. M. , Rahman, F. , Indarto, P. , & Warthadi, A. N. (2026). Comparative analysis of plantar pressure distribution among football players across playing positions: A cross-sectional study. Physical Education and Sports: Studies and Research, 68-81. https://doi.org/10.56003/pessr.v5i1.692 -
The impact of coaching communication styles and training programs on novice tennis player satisfaction: A case study from Indonesia
Mohammad Aldi Zakaria1, Limpad Nurrachmad21. State University of Semarang , ID2. State University of Semarang , ID2025-07-17|page 152-161AbstractBackground: The satisfaction of beginner tennis players is often influenced by coaches' communication styles and the structure of training programs.
Objectives: This study analyzed the effects of coaching communication style and training program design on player satisfaction at Club First Tennis.
Methods: A quantitative, descriptive-associative approach was used with 50 beginner players in regular training sessions. Data were collected using a Likert-scale questionnaire covering coach communication style, training program design, and player satisfaction. Statistical analyses included validity and reliability tests, normality checks, and Spearman's rank correlation due to non-parametric data.
Results: Results showed strong, significant relationships between coaching communication and player satisfaction (r = 0.615, p < 0.05), as well as between training programs and satisfaction (r = 0.620, p < 0.05). These findings indicate that supportive and adaptive communication and well-structured training enhance athlete satisfaction and engagement.
Conclusions: The study highlights the importance of integrating effective communication and program planning in coaching beginner athletes. Future studies are encouraged to explore additional influencing factors such as intrinsic motivation or external support, and to involve larger sample sizes for broader generalizability.
APA Citation StyleZakaria, M. A. , & Nurrachmad, L. (2025). The impact of coaching communication styles and training programs on novice tennis player satisfaction: A case study from Indonesia. Physical Education and Sports: Studies and Research, 152-161. https://doi.org/10.56003/pessr.v4i2.603 -
Impact of five-cone and ladder drill training on agility among U15 football athletes
Pupuh Harya Prembanyu1, Agus Wiyanto2, Setiyawan Setiyawan31. Universitas PGRI Semarang , ID2. Universitas PGRI Semarang , ID3. Universitas PGRI Semarang , ID2025-11-26|page 266-274AbstractBackground: Although it may seem simple, soccer has complex characteristics, which is why many children are attracted to training at soccer schools. Agility is a crucial aspect of the game, as it enables a player to move quickly, evade opponents, and control the ball effectively. At the Pemalang Regency Bina Talenta Soccer School (SSB), agility training is not conducted optimally and has not been implemented systematically with effective methods. Therefore, exercises such as the five-cone and ladder drills need to be implemented to improve player agility more effectively.
Objectives: This study aims to examine the impact of five-cone and ladder drill training on the agility of U15 football athletes.
Methods: This study used a quantitative descriptive method with a quasi-experimental approach. The experimental design was a pretest-posttest in two groups. The sampling technique used was purposive sampling with 20 players participating in a four-week training program. The instrument to measure agility was the Illinois Agility Test, with a validity level of r = 0.87. The measurement data were analyzed using a difference test with the help of SPSS software version 29.0.
Results: The five-cone drill and the ladder drill had a significant effect on agility, as both exercises had a significance value of <0.05. The five-cone drill was more effective than the ladder drill. This was due to the difference in scores between the five-cone drill, which increased by 1.04, and the ladder drill, which increased by 0.84.
Conclusions: Both training methods are effective in improving agility and can be integrated into school-based football training programs. Furthermore, the results of implementing these methods can enhance player performance and provide a valuable source of new knowledge for future researchers on agility in SSB players.
APA Citation StylePrembanyu, P. H. , Wiyanto, A. , & Setiyawan, S. (2025). Impact of five-cone and ladder drill training on agility among U15 football athletes. Physical Education and Sports: Studies and Research, 266-274. https://doi.org/10.56003/pessr.v4i3.633 -
Correlation Between Blood Lactate and Salivary Biomarkers During Exercise in Women with Hypothyroidism Treated With L-Thyroxine
Romeu Paulo Martins Silva1, Alexandre Gonçalves2, Carolina Freitas da Silva3, Miguel Júnior Sordi Bortolini4, Elmiro Santos Resende5, Luis Carlos Oliveira Gonçalves6, Aníbal Monteiro de Magalhães-Neto7, Foued Salmen Espindola81. Federal University of Catalão, Brazil , BR2. IMEPAC University Center, Araguari - MG, 38444-128, Brazil , BR3. Federal University of Acre, Rio Branco - AC, 69920-900, Brazil , BR4. Federal University of Acre, Rio Branco - AC, 69920-900, Brazil , BR5. Federal University of Uberlandia - MG, 38405-320, Brazil , BR6. Federal University of Mato Grosso - MT, 78060-900, Brazil , BR7. Federal University of Mato Grosso - MT, 78060-900, Brazil , BR8. Federal University of Uberlandia - MG, 38405-320, Brazil , BR2024-05-05|page 57-76AbstractBackground: Hypothyroidism reduces circulating levels of thyroid hormones metabolic enzymatic activities, and the skeletal muscle's work capacity and lactatemia increase during exertion.
Objectives: To analyze salivary biomarkers and blood lactate obtained in exercise stages through exhaustion and investigate their correlation.
Methods: Eight females attended the University Clinical Hospital who showed a condition of subclinical hypothyroidism. Before they began replacing with L-thyroxine, they were submitted to an ergometric test to check their tolerance to effort. Eight weeks after treatment, all volunteers were again submitted to lab and ergometric tests. Saliva and blood were collected to determine total protein, nitric oxide, IgA, lactate, and lipid profile.
Results: The present study identified a correlation (0.8), so the behavior of the blood lactate could explain the behavior of the salivary of total proteins by 74.22% (R2 = 0.7422). Lactate production was minimized when women underwent L-thyroxine treatment in the first six stages of exercise. Still, total salivary proteins increased for pharmacotherapy between stages 1 and 8. While salivary nitric oxide had a percentage variation between pre- and post-exercise times of 96% before the start of treatment when the same exercise was performed after eight weeks of treatment with L-Thyroxine, this variation was 150%.
Conclusion: The measurement of STP is an essential marker of stress, and it is highly correlated with the most used blood marker, lactate. Regarding treatment with L-Thyroxine in women with subclinical hypothyroidism, after eight weeks of this therapy, it was possible to observe a reduction in blood lactate production after the incremental load test on a cycle ergometer, accompanied by a reduction in the concentration of SA. SNO and SIgA tended to increase in women undergoing treatment, and this treatment should be considered in subsequent studies as causing a different effect on these markers.
APA Citation StyleSilva, R. P. M. , Gonçalves, A. , Silva, C. F. D. , Bortolini, M. J. S. , Resende, E. S. , Gonçalves, L. C. O. , Magalhães-Neto, A. M. D. , & Espindola, F. S. (2024). Correlation Between Blood Lactate and Salivary Biomarkers During Exercise in Women with Hypothyroidism Treated With L-Thyroxine. Physical Education and Sports: Studies and Research, 57-76. https://doi.org/10.56003/pessr.v3i1.346 -
A comparison of VO₂max response of 15-year-old soccer athletes based on training time in the tropical climate of Bima
Firdaus Firdaus1, Taty Hartati2, Rabwan Satriawan3, Shutan Arie Shandi4, Nor Fazila Abd Malek51. Department of Physical Education, STKIP Taman Siswa Bima , ID2. Department of History, STKIP Taman Siswa Bima , ID3. Department of Physical Education, STKIP Taman Siswa Bima , ID4. Department of Physical Education, STKIP Taman Siswa Bima , ID5. Faculty of Sports Science and Coaching, Sultan Idris Education University , MY2026-04-14|page 125-134AbstractBackground: VO₂max is the primary indicator of a soccer athlete's aerobic capacity, but in tropical climates like Bima, high temperatures and humidity can affect VO₂max achievement. Hence, the timing of training is an important factor to consider.
Objectives: This study aims to analyze differences in VO₂max across training times (morning and afternoon) in 15-year-old youth soccer athletes from the Bima Football Association (PERSSEBI).
Methods: The study used a quantitative, comparative, cross-sectional observational design. The study subjects were 45 athletes (age 15.31±0.46; height 163.12±4.35 cm; weight 55.28±3.67 kg; and body mass index (BMI) 20.78±1.18 kg/m²) from the Bima Football Association (PERSEBI), selected by purposive sampling, and divided into morning (n=23) and afternoon (n=22) training groups. VO₂max was measured using a multistage fitness test (Bleep Test). Data analysis included descriptive statistics, the Shapiro–Wilk normality test, the Levene homogeneity test, and the independent-samples t-test at a significance level of 0.05, using IBM SPSS 25.
Results: The descriptive analysis showed that the average VO₂max of the morning group was 43.78 ± 2.34 ml/kg/minute, higher than that of the afternoon group (42.91 ± 2.29 ml/kg/minute). The results of the independent sample t-test showed that there was a significant difference in VO₂max between the two groups with a t value = 2.14 with df = 43 and a significant p value = 0.04 (p < 0.05) with an average difference of 0.87 ml/kg/minute indicating that the morning exercise group had a higher Vo2max value than the afternoon exercise group.
Conclusions: These findings suggest that training time contributes to differences in athletes' VO₂max values in tropical environments, with morning training resulting in higher performance than afternoon training. Therefore, scheduling training that accounts for environmental conditions is crucial for optimizing athletes' VO₂max.
APA Citation StyleFirdaus, F. , Hartati, T. , Satriawan, R. , Shandi, S. A. , & Malek, N. F. A. (2026). A comparison of VO₂max response of 15-year-old soccer athletes based on training time in the tropical climate of Bima. Physical Education and Sports: Studies and Research, 125-134. https://doi.org/10.56003/pessr.v5i1.709 -
The effect of championship participation on training intensity and motivation of Pencak Silat student athletes at Semarang State University, Indonesia
Achmad Alif Firmansyah1, Nanang Indardi21. State University of Semarang , ID2. State University of Semarang , ID2025-08-15|page 204-211AbstractBackground: Consistent training and high enthusiasm are the keys to an athlete's success in achieving optimal performance. However, among Pencak Silat athletes at Semarang State University (UNNES), there is a decrease in training intensity and enthusiasm when there is no championship agenda.
Objectives: The purpose of this study is to analyze the effect of participation in a championship on the training intensity and motivation of Semarang State University Pencak Silat athletes.
Methods: This study used a pre-post design with the same subjects (n = 30) and an explanatory quantitative approach to determine the effect of championship participation on training intensity and motivation. Data were collected using a Likert scale questionnaire that has been tested for validity and reliability (α = 0.872). Data analysis was performed using a paired t-test using SPSS.
Results: The results showed a significant increase in training intensity from a mean ± SD of 3.12 ± 0.54 (pre) to 3.78 ± 0.49 (post), and training motivation from 3.05 ± 0.61 (pre) to 3.85 ± 0.55 (post), with t(29) = 5.62 and 6.03, respectively, p = 0.004. Cohen's d effect sizes of 1.03 (intensity) and 1.10 (motivation) indicate significant effects.
Conclusions: These findings indicate that participation in championships is a significant external motivator in improving the quality of athletes' training. Therefore, championships can be a coaching strategy to maintain sustainable training motivation, a practical implication that this study has clearly demonstrated.
APA Citation StyleFirmansyah, A. A. , & Indardi, N. (2025). The effect of championship participation on training intensity and motivation of Pencak Silat student athletes at Semarang State University, Indonesia. Physical Education and Sports: Studies and Research, 204-211. https://doi.org/10.56003/pessr.v4i2.620 -
Functional movement patterns and bilateral asymmetry in badminton athletes: A Functional Movement Screen analysis at the Malang Regional Training Center
Avi Kholifatuz Zahro'1, Muhammad Atiq Noviudin Pritama21. State University of Malang , ID2. State University of Malang , ID2026-08-17|page 196-207AbstractBackground: Badminton involves repetitive unilateral overhead movements, rapid changes of direction, and explosive actions that may contribute to side-to-side differences in functional movement patterns.
Objectives: This study aimed to describe functional movement patterns and bilateral asymmetry among badminton athletes at the Malang Regional Training Center using the Functional Movement Screen (FMS).
Methods: This cross-sectional study involved 16 sub-elite badminton athletes aged 15–20 years selected through purposive sampling. Functional movement was assessed using the seven-component FMS. Total scores were classified as high (≤14), moderate (15–17), or low (18–21) injury risk. Bilateral asymmetry was identified from differences between right- and left-side scores in five bilateral FMS components. Data were analyzed descriptively using means, standard deviations, frequencies, and percentages.
Results: Most athletes (62.5%, n = 10) were classified as having moderate injury risk, while 18.75% (n = 3) were classified as high risk and 18.75% (n = 3) as low risk. Shoulder Mobility showed the highest prevalence of bilateral asymmetry (100%, n = 16), followed by the In-Line Lunge and Rotary Stability (62.5%, n = 10 each), Hurdle Step (50.0%, n = 8), and Active Straight Leg Raise (43.75%, n = 7).
Conclusions: Bilateral functional movement asymmetry was common among badminton athletes, particularly in shoulder mobility, while most athletes were classified within the moderate injury-risk category. These findings support functional movement screening to identify movement limitations and inform individualized corrective exercise strategies.
APA Citation StyleZahro', A. K. , & Pritama, M. A. N. (2026). Functional movement patterns and bilateral asymmetry in badminton athletes: A Functional Movement Screen analysis at the Malang Regional Training Center. Physical Education and Sports: Studies and Research, 196-207. https://doi.org/10.56003/pessr.v5i2.756 -
Motor activity and foreign language learning in preschool: A review of movement-based and total physical response interventions
Manuela Valentini1, Nausicaa Simone2, Alessandro Beretta31. Department of Humanities, University of Urbino Carlo Bo , IT2. Department of Humanities, University of Urbino Carlo Bo , IT3. Department of Humanities, University of Urbino Carlo Bo , IT2026-04-02|page 93-105AbstractBackground: Movement may support early foreign-language learning through embodied learning, but the preschool evidence base is fragmented.
Objective: To review empirical studies on movement-based and Total Physical Response (TPR) interventions for foreign-language learning in preschool children.
Method: This study employed a systematic review design based on PRISMA 2020 guidelines, involving database searches and citation tracking to identify empirical studies on movement-based and Total Physical Response (TPR) interventions in preschool foreign-language learning. Studies were screened using predefined eligibility criteria and appraised using the Mixed Methods Appraisal Tool (MMAT). Data from eligible studies were extracted and synthesized narratively due to methodological heterogeneity.
Results: Eight studies met the inclusion criteria. Across stronger controlled studies, semantically integrated movement generally produced more favorable vocabulary and verbal memory outcomes than sedentary teaching or less integrated movement. Evidence focused specifically on TPR was positive in terms of engagement and short-term learning, but methodologically heterogeneous and less robust.
Conclusion: Current preschool evidence supports the promise of integrated movement-based language teaching, particularly when movement is tightly aligned with instructional content. However, the evidence base remains small, largely limited to vocabulary-related outcomes, and further rigorous preschool trials are needed to clarify optimal implementation and the distinct contribution of TPR.APA Citation StyleValentini, M. , Simone, N. , & Beretta, A. (2026). Motor activity and foreign language learning in preschool: A review of movement-based and total physical response interventions. Physical Education and Sports: Studies and Research, 93-105. https://doi.org/10.56003/pessr.v5i1.694 -
The association between healthy dietary habits and physical fitness among junior high school students: A rural school case study
Moch. Yunus1, Yulingga Nanda Hanief2, Muhammad Putra Ramadhan3, Erika Ayu Sylvianingrum41. State University of Malang , ID2. State University of Malang , ID3. State University of Malang , ID4. State University of Malang , ID2025-12-30|page 344-354AbstractBackground: The health conditions of the community, particularly in relation to the physical fitness of junior high school students, require serious attention, especially in rural areas that differ significantly from urban areas. Previous research findings on dietary patterns and physical fitness still show inconsistent results.
Objectives: This study aims to investigate the relationship between healthy eating habits and physical fitness among junior high school students residing in rural areas.
Methods: This study used a quantitative design with a cross-sectional approach. The research subjects consisted of 27 students from public junior high schools in rural areas, selected through a balanced stratified random sampling process that involved all grade levels. Eating habits were measured using a 24-hour food recall, as it is an effective method for monitoring food intake over a short period. Physical fitness was measured using the Nusantara Student Fitness Test (TKPN), a national standard instrument. Data analysis was performed using descriptive statistics, Spearman's correlation, and linear regression.
Results: Most of the study participants were underweight with varied eating patterns. The analysis results showed no significant relationship between physical fitness and healthy eating patterns, as indicated by a correlation coefficient of 0.061 and a p-value of 0.764. The small effect size suggests that eating patterns did not have a significant impact on fitness levels in this group of participants.
Conclusions: The study shows that rural junior high school students achieve their physical fitness through exercise and their exercise-rest patterns and their inherited characteristics rather than their diet.APA Citation StyleYunus, M. , Hanief, Y. N. , Ramadhan, M. P. , & Sylvianingrum, E. A. (2025). The association between healthy dietary habits and physical fitness among junior high school students: A rural school case study. Physical Education and Sports: Studies and Research, 344-354. https://doi.org/10.56003/pessr.v4i3.665 -
A critical analysis of the disconnection between science and practice in weight training
Ferdinando Cereda11. The Catholic University of the Sacred Heart in Milan , IT2025-04-07|page 46-59AbstractBackground: Resistance training (RT) has emerged as a powerful tool for health promotion, with substantial scientific evidence supporting its beneficial effects across multiple physiological systems and psychological domains. Despite this robust knowledge base, a significant disconnection persists between scientific evidence and practical implementation in both clinical and everyday settings.
Objectives: This study aims to critically examine this science-practice gap by analyzing common misconceptions surrounding RT and proposing strategies to enhance knowledge translation.
Methods: Through a narrative review of scientific literature from PubMed, Scopus, and Google Scholar, the research synthesizes evidence regarding RT's scientifically validated benefits, prevalent myths, and effective communication approaches.
Results: Findings show a concerning lack of scientific awareness among practitioners and end-users. Persistent misconceptions, such as "RT reduces flexibility" and "plant-based proteins are inferior for muscle hypertrophy," continue to circulate despite contradictory evidence.
Conclusions: Improved scientific communication via targeted educational programs, digital platforms, and collaboration between researchers and policymakers is urgently needed to bridge this gap and maximize RT’s public health impact.
APA Citation StyleCereda, F. (2025). A critical analysis of the disconnection between science and practice in weight training. Physical Education and Sports: Studies and Research, 46-59. https://doi.org/10.56003/pessr.v4i1.499 -
Performance determinants in tropical trail running: Race result analysis of the 5K and 10K Merapi Merbabu de Trail 2025
Siti Baitul Mukarromah1, Sugiarto Sugiarto2, Gustiana Mega Anggita3, Sri Agus Budi Santoso4, Sangheon Park5, Ambar Dwi Erawati6, Rikha Liemiyah7, Aziiz Mardanarian Rosdianto8, Ronny Lesmana9, Faisyal Syofian101. State University of Semarang , ID2. State University of Semarang , ID3. State University of Semarang , ID4. Tarra Adventure, Boyolali Regency, Central Java Province , ID5. Korea Institute of Sport Science, Seoul , KR6. Widya Husada Semarang University , ID7. Universitas Dian Nuswantoro , ID8. Universitas Padjajaran , ID9. Universitas Padjajaran , ID10. Sultan Agung Islamic University , ID2026-04-03|page 82-92AbstractBackground: The limited research on the determinants of performance in short-distance trail running in tropical environments is a major problem in understanding the influence of environmental conditions on runners' performance and pacing strategies.
Objectives: This study aimed to examine the influence of race distance, sex, and age on trail running performance in the 5K and 10K categories of the Merapi Merbabu de Trail 2025.
Methods: A retrospective observational race result analysis was conducted using official race data from the Merapi Merbabu de Trail 2025. The study included 429 runners (5K: n = 144; 10K: n = 285), consisting of 275 male and 154 female participants. The primary outcome variable was finish time (in minutes), while the independent variables included race, distance, sex, and age. Statistical analyses were performed using SPSS version 26, including descriptive statistics, independent-samples t-tests, Cohen’s d effect sizes, and multiple linear regression to evaluate predictors of performance.
Results: Results showed a significant difference in performance between race distances. The mean finish time for the 5K category was 152.8 ± 44.3 minutes, while the 10K category averaged 306.1 ± 74.3 minutes (t = -26.68, p < 0.001, Cohen’s d = 2.50). Male runners completed the 10K race faster than female runners (293 vs. 345 minutes). Regression analysis indicated that finish time increased by approximately 2–3 minutes per year of age, indicating a progressive decline in performance with increasing age.
Conclusions: These findings indicate that race distance, sex, and age are significant determinants of trail running performance in tropical environments.APA Citation StyleMukarromah, S. B. , Sugiarto, S. , Anggita, G. M. , Santoso, S. A. B. , Park, S. , Erawati, A. D. , Liemiyah, R. , Rosdianto, A. M. , Lesmana, R. , & Syofian, F. (2026). Performance determinants in tropical trail running: Race result analysis of the 5K and 10K Merapi Merbabu de Trail 2025. Physical Education and Sports: Studies and Research, 82-92. https://doi.org/10.56003/pessr.v5i1.699 -
Immunity to rhythm: Visual or auditory stimuli during intense aerobic exertion do not modulate the mood of young adults
Flavio de Souza Araujo1, Camila Maria Menezes Almeida2, Mariana Ferreira de Souza3, Marcelo Magalhães Sales4, José Fernando Vila Nova de Moraes51. Federal University of Vale do São Francisco , BR2. Federal University of Vale do São Francisco , BR3. Federal University of Vale do São Francisco , BR4. State University of Goiás , BR5. Universidade Federal do Vale do São Francisco (UNIVASF) , BR2026-04-26|page 160-171AbstractBackground: High-intensity aerobic exercise can promote higher energy expenditure when compared to low and moderate-intensity exercise. However, vigorous exercise can negatively influence mood responses related to adherence. Auditory and audiovisual resources have been used to improve psychological variables during and after exercise.
Objectives: To analyze the influence of listening to music and watching video clips on mood responses of young adults after a high-intensity aerobic exercise session.
Methods: This is a Cross-Sectional Randomized Controlled Study in which fourteen male participants (23.4 ± 3.1 years; 26.2 ± 3.4 kg/m²) randomly performed exercise sessions on a cyclergometer, at an intensity of 10% above anaerobic threshold, in three situations: control (C), listening to music (M), and watching video clips (VC). At the end of each session, participants underwent 30 min of passive recovery. Mood responses were measured using Brunel’s Mood Scale (BRUMS) before exercise, immediately after exercise, and after recovery. Friedman’s and Wilcoxon’s tests were used, with a significance level of 5%.
Results: No statistical differences were found between conditions (C, C, and VC) for the dimensions confusion, fatigue, anger, tension, and vigor (p>0.05). A statistically significant difference was found for depression before exercise, with M higher than C and VC (p<0.05); however, no differences were observed after exercise or recovery.
Conclusions: Listening to music and/or watching video clips does not influence mood responses in young adults after high-intensity aerobic exercise on a cyclergometer.
APA Citation StyleAraujo, F. D. S. , Almeida, C. M. M. , Souza, M. F. D. , Sales, M. M. , & Moraes, J. F. V. N. D. (2026). Immunity to rhythm: Visual or auditory stimuli during intense aerobic exertion do not modulate the mood of young adults. Physical Education and Sports: Studies and Research, 160-171. https://doi.org/10.56003/pessr.v5i1.702 -
Integrity in the age of AI: navigating authorship, accountability and ethical publishing
Yulingga Nanda Hanief11. State University of Malang , ID2026-04-03|page 106-112AbstractThe rapid emergence of generative artificial intelligence (AI) is reshaping the landscape of academic writing and scholarly publishing, offering both opportunities and ethical challenges. This editorial reflects on the growing implications of AI-assisted authorship, particularly regarding authorship, accountability, and research integrity. While AI tools can improve clarity and accessibility, their misuse raises concerns about the erosion of critical thinking and the reliability of scientific results.
A key issue highlighted in this discussion is the increasing incidence of false or unverifiable references generated through AI-assisted processes. These practices threaten the credibility of scholarly communication and increase the burden on editors and reviewers. In response, this editorial emphasizes the importance of responsible AI use, transparency in authorship, and rigorous source verification.
Furthermore, the article outlines the journal's commitment to maintaining high standards of quality and ethical publishing. This includes strengthening editorial policies, promoting integrity in manuscript preparation, and encouraging accountability among authors. The editorial also calls on the academic community to adopt responsible practices in the use of emerging technologies.
In line with international publishing standards, this editorial is designed to provide critical perspectives, articulate editorial responsibilities, and offer a forward-looking stance on ethical scientific communication. Ultimately, maintaining trust and credibility in the AI era requires a collective commitment to transparency, rigor, and integrity at every stage of the publication process.
APA Citation StyleHanief, Y. N. (2026). Integrity in the age of AI: navigating authorship, accountability and ethical publishing. Physical Education and Sports: Studies and Research, 106-112. https://doi.org/10.56003/pessr.v5i1.720 -
Optimising physiological recovery after high-intensity training: A combined approach of hydrotherapy, contrast bath, and full-body massage in futsal players
Afif Dwi Nugraha1, Laily Mita Andriana2, Muhamad Fauzi Antoni3, Muhammad Labib Siena Ar Rasyid4, Bhekti Lestari51. Universitas Negeri Surabaya , ID2. Universitas Negeri Surabaya , ID3. Universitas Negeri Surabaya , ID4. Universitas Negeri Surabaya , ID5. Universitas Negeri Surabaya , ID2025-12-15|page 302-317AbstractBackground: Efficient recovery after high-intensity interval training (HIIT) is crucial for maintaining optimal performance and minimizing the risk of injury.
Objectives: This study aims to analyze the effectiveness of combining hydrotherapy contrast baths and full-body massage in accelerating physiological recovery after a HIIT session, compared to the application of a single method.
Methods: This study employed a pre–post quasi-experimental design with three parallel groups (n = 45; 15 participants per group) to analyze the effectiveness of hydrotherapy combined with whole-body massage compared with each method applied separately. Participants were assigned to one of three conditions: (1) hydrotherapy contrast bath only, (2) full-body massage only, and (3) a combined intervention using both techniques. Physiological recovery was assessed using validated instruments, including heart rate monitors for heart rate recovery (HRR), portable lactate analysers for blood lactate concentration, and a visual analogue scale (VAS) for perceived muscle soreness. Data were analysed using the Shapiro–Wilk test, paired-sample t-test, and One-Way ANOVA.
Results: The findings demonstrated that the combined hydrotherapy–massage protocol resulted in greater improvements than the single-method groups, particularly in lactate reduction (e.g., -3.1 ± 0.8 mmol/L vs. - 1.9 ± 0.7 mmol/L and - 2.0 ± 0.6 mmol/L; p<0.05) and faster HRR. Participants in the combined group also reported significantly lower muscle soreness (p<0.05).
Conclusions: This suggests that integrating contrast bath hydrotherapy with full-body massage enhances circulation, accelerates metabolic waste clearance, and improves subjective recovery following HIIT. Future studies are recommended to include larger samples, compare different hydrotherapy temperatures, or examine long-term adaptations from repeated recovery sessions.APA Citation StyleNugraha, A. D. , Andriana, L. M. , Antoni, M. F. , Rasyid, M. L. S. A. , & Lestari, B. (2025). Optimising physiological recovery after high-intensity training: A combined approach of hydrotherapy, contrast bath, and full-body massage in futsal players. Physical Education and Sports: Studies and Research, 302-317. https://doi.org/10.56003/pessr.v4i3.655 -
The Impact of the Sports Education Athletic Season on the Learning Motivation as Supporters of the Kurikulum Merdeka
Agi Ginanjar1, Reni Anggraeni21. STKIP Nahdlatul Ulama Indramayu, Indonesia , ID2. Indonesian Institute of the Arts Denpasar, Indonesia , ID2024-03-12|page 1-9AbstractBackground: Physical education learning in Indonesia has had to switch to using the Kurikulum Merdeka which focuses more on students as the center of learning with project reports and project themes. Motivation is very important for students in following the learning process. Sport Education is a learning strategy that facilitates students and teachers with projects in the learning process and can increase student learning motivation.
Objectives: The aim of the research was to examine the influence of SE on learning motivation in MTs students.
Methods: The research method used in this research uses an experimental research method with a one-shot case study design. Participants in this research were 48 students at one of the MTs in Indramayu Regency. The instrument in this research used a student learning motivation questionnaire. The data analysis technique uses a one-sample t test.
Results: The results of this research obtained t count = 7.05 with Sig. 0.00 < 0.05, which means that there is an influence of SE on the learning motivation of MTs students.
Conclusion: This research concludes that there is an influence of SE on learning motivation in Junior High Schoolstudents.
APA Citation StyleGinanjar, A. , & Anggraeni, R. (2024). The Impact of the Sports Education Athletic Season on the Learning Motivation as Supporters of the Kurikulum Merdeka. Physical Education and Sports: Studies and Research, 1-9. https://doi.org/10.56003/pessr.v3i1.315
