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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 -
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 -
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 -
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 -
Improving physical self-perception and health-related fitness through gamification in physical education: A cluster randomized controlled trial
Ferdinando Cereda11. The Catholic University of the Sacred Heart in Milan , IT2026-03-08|page 7-27AbstractBackground: The global decline in adolescent physical activity necessitates pedagogical innovation to counter disengagement. Traditional norm-referenced physical education (PE) often alienates less skilled students, whereas gamification offers a promising criterion-referenced strategy to enhance motivation and learning.
Objectives: This study investigated the efficacy of a 12-week gamified didactic intervention on perceived physical self-concept, health-related fitness, and physical activity enjoyment among high school students.
Methods: A two-arm, parallel-group, cluster randomized controlled trial (Cluster-RCT) was conducted with 210 Italian adolescents (mean age 15.4 ± 0.9 years) nested within 10 intact classes (average cluster size = 21). Intact classes were randomised to an experimental group (gamified ‘MoveQuest’ module, k = 5) or a control group (traditional direct instruction, k = 5). Data were collected using the Revised Physical Self-Perception Profile (PSPP-R-IT), the ALPHA-FIT test battery, and the Physical Activity Enjoyment Scale (PACES). Following a per-protocol analytical approach, Linear mixed models (LMMs) were employed to analyse the data, accounting for the nested structure of the educational setting and handling cluster-level variance intraclass correlation coefficients (ICCs). Significance levels were interpreted considering the multiplicity of outcomes.
Results: Significant group × time interactions were observed, with the gamified group demonstrating superior improvements in sports competence (d = 0.65), physical self-worth (d = 0.58), and enjoyment (d = 0.82) compared to the control group. Physiologically, the experimental group showed significantly greater gains in cardiorespiratory fitness (V̇O₂ max) and agility, while body attractiveness remained stable in both groups.
Conclusions: Gamified didactics significantly enhance psychological engagement and specific motor performance parameters by prioritising individual progress over social comparison. This approach represents a valuable pedagogical tool for fostering physical literacy in secondary PE.APA Citation StyleCereda, F. (2026). Improving physical self-perception and health-related fitness through gamification in physical education: A cluster randomized controlled trial. Physical Education and Sports: Studies and Research, 7-27. https://doi.org/10.56003/pessr.v5i1.677 -
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 -
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 -
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 -
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 -
The combination of plyometric and ladder drills can improve acceleration and footwork skills in badminton players
Muhammad Labib Siena Ar Rasyid1, Oce Wiriawan2, Afif Rusdiawan3, Laily Mita Andriana4, Enarnimas Dwi Ratna Damayanti51. Department of Sports Coaching Education, Faculty of Sport and Health Sciences, Universitas Negeri Surabaya , ID2. Department of Sports Coaching Education, Faculty of Sport and Health Sciences, Universitas Negeri Surabaya , ID3. Department of Sports Science, Faculty of Sport and Health Sciences, Universitas Negeri Surabaya , ID4. Department of Sports Coaching Education, Faculty of Sport and Health Sciences, Universitas Negeri Surabaya , ID5. Department of Sports Coaching Education, Faculty of Sport and Health Sciences, Universitas Negeri Surabaya , ID2026-03-08|page 28-39AbstractBackground: Recognized globally as the fastest racket sport in the world, badminton demands exceptional acceleration and footwork skills for competitive success. However, many intermediate players often struggle to produce the explosive power needed for fast-paced rallies. To enhance these physical attributes, targeted training interventions, such as a hybrid regimen of plyometric and ladder drills, are often required.
Objectives: This study aims to analyze the efficacy of integrating plyometric exercises with ladder drills in enhancing acceleration and footwork proficiency among badminton players.
Methods: This research employed a quasi-experimental design with a non-equivalent control group. Through purposive sampling, 24 male participants (aged 14-16 years) with at least 2 years of training experience, good health, and no history of recent injuries were selected. They were assigned to either the PLD Group (age: 15.00 ± 0.74 years; height: 162.00 ± 0.07 cm; weight: 50.58 ± 5.68 kg; BMI: 19.20 ± 0.88 kg/m²) or the CV Group (age: 15.00 ± 0.85 years; height: 162.08 ± 0.08 cm; weight: 51.75 ± 8.05 kg; BMI: 19.59 ± 1.56 kg/m²). The intervention spanned six weeks, with three sessions per week. Performance in acceleration was assessed using a 10-meter sprint, and footwork skills were assessed using the footwork skills test (Tohar version) pre- and post-intervention. Data analysis employed the Wilcoxon signed-rank and the Mann-Whitney tests.
Results: The Wilcoxon analysis indicated that both the PLD and CV Groups achieved improvements in acceleration and footwork skills (p<0.05). However, the Mann-Whitney test revealed a statistically significant difference between the two groups, with the PLD Group demonstrating superior gains in both acceleration (p<0.05) and footwork skills (p<0.05) compared to the CV Group.
Conclusions: Integrating plyometric training and ladder drills is an effective strategy for significantly improving acceleration and footwork skills in badminton players.
APA Citation StyleRasyid, M. L. S. A. , Wiriawan, O. , Rusdiawan, A. , Andriana, L. M. , & Damayanti, E. D. R. (2026). The combination of plyometric and ladder drills can improve acceleration and footwork skills in badminton players. Physical Education and Sports: Studies and Research, 28-39. https://doi.org/10.56003/pessr.v5i1.669 -
Immediate effect of thoracic spinal manipulation versus passive stretching on upper trapezius pain in university students: A randomized controlled trial
Sherin Nada Salsabila1, Adnan Faris Naufal21. Universitas Muhammadiyah Surakarta , ID2. Universitas Muhammadiyah Surakarta , ID2025-11-26|page 250-265AbstractBackground: Pain disorders in the upper trapezius muscle are often experienced by students due to non-ergonomic postures and excessive duration of device use. Interventions such as spinal manipulation and stretching exercises are non-invasive interventions often used to reduce pain and improve muscle function.
Objectives: This study compares the effectiveness of two interventions in reducing trapezius muscle pain among university students.
Methods: This randomized controlled trial involved 40 physiotherapy students divided equally into two intervention groups. Group I received thoracic spinal manipulation, and Group II received passive stretching. Each intervention was administered in a single 15-minute session. Pain intensity was measured using the Numeric Rating Scale (NRS) before and immediately after treatment. Data were analyzed using the Wilcoxon Signed-Rank test for within-group comparisons and the Mann–Whitney U test for between-group analysis, with an alpha level of 0.05.
Results: The Wilcoxon test revealed a significant decrease in pain within both groups (Group I: median pre 4.5 [3.63–5] to post 2.5 [1.50–3.38], p = 0.000, r = 0.879; Group II: median pre 4.25 [3–5] to post 1 [0.13–3], p = 0.000, r = 0.84), indicating a significant effect of both interventions. The Mann–Whitney U test showed no statistically significant difference in pain reduction between the two groups (median pain difference = 2 [1–3] for both, U = 186.5, Z = –0.375, p = 0.707, r = 0.06).
Conclusions: Both thoracic spinal manipulation and passive stretching were effective in reducing upper trapezius pain immediately after a single session, but no significant difference was found between the two interventions. These findings suggest that both approaches provide comparable short-term benefits; however, further research with larger samples, multiple sessions, and more extended follow-up periods is needed to confirm their long-term efficacy.
APA Citation StyleSalsabila, S. N. , & Naufal, A. F. (2025). Immediate effect of thoracic spinal manipulation versus passive stretching on upper trapezius pain in university students: A randomized controlled trial. Physical Education and Sports: Studies and Research, 250-265. https://doi.org/10.56003/pessr.v4i3.634
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