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All Journal Contagion: Scientific Periodical Journal of Public Health and Coastal Health
Ockta, Yovhandra
Faculty of Health Sciences, Universitas Teuku Umar
Health Professions Public Health

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The Correlation Between Body Mass Index and Body Fat Percentage in Menopausal Women in Padang: A Quasi-Experimental Study Putra, Muarif Arhas; Alficandra, Alficandra; Manurizal, Lolia; Hidayat, Joni Taufik; Putri, Rahmah Evita; Ockta, Yovhandra
Contagion: Scientific Periodical Journal of Public Health and Coastal Health Vol 7, No 1 (2025): CONTAGION
Publisher : Universitas Islam Negeri Sumatera Utara, Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30829/contagion.v7i1.23792

Abstract

The global increase in overweight and obesity has become a critical public health concern, particularly among menopausal women who experience hormonal changes that contribute to increased body fat—especially in the abdominal region. High-Intensity Interval Training (HIIT) has emerged as a time-efficient alternative to conventional exercise, offering potential benefits in reducing Body Mass Index (BMI) and Body Fat Percentage (BFP). This quasi-experimental study, conducted in Padang, Indonesia, aimed to examine the correlation between BMI and BFP in menopausal women aged 50–60 years following a five-month HIIT intervention. A total of 50 obese menopausal women were selected using stratified sampling and assigned to either an experimental group (HIIT) or a control group (aerobic exercise). Pretest and posttest measurements were collected for body weight, BMI, and BFP. Statistical analyses included tests for normality and homogeneity, the Mann–Whitney U test, independent t-test, and Spearman’s rank correlation. The findings revealed significant reductions in both BMI and BFP in the HIIT group compared to the control group. A very strong positive correlation was observed between BMI and BFP (r = 0.914, p < 0.001), suggesting that decreases in BMI are closely linked to reductions in body fat. This study provides preliminary evidence from Indonesia supporting HIIT as an effective and time-efficient intervention for addressing obesity-related outcomes in menopausal women. Further research is warranted to investigate the underlying mechanisms and to generalize these findings to broader menopausal populations. Keyword: High-Intensity Interval Training, Menopause, Body Mass Index, Body Fat Percentage, Obese Women.
The Influence of Short-Distance Sprint Training on Physical Condition and Speed Performance in Youth Volleyball Players Romandoni, Evi Saputri; Wahyudi, Agung; Ockta, Yovhandra
Contagion: Scientific Periodical Journal of Public Health and Coastal Health Vol 7, No 2 (2025): CONTAGION
Publisher : Universitas Islam Negeri Sumatera Utara, Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30829/contagion.v7i2.24424

Abstract

Volleyball is a sport that requires high levels of speed and endurance, making targeted physical training essential for optimal performance. Sprint training over distances of 50 and 80 meters is one approach that can enhance both attributes. This study investigates the effects of 50-meter and 80-meter sprint training on the speed performance of volleyball players involved in extracurricular activities at MAN 2 Banjarnegara. A quantitative experimental design was employed, utilizing a Two-Group Pretest-Posttest framework. Participants were randomly assigned to two experimental groups: Group A (50-meter sprint training) and Group B (80-meter sprint training). Across 14 training sessions, including pretest and posttest assessments, data were collected using a 60-meter sprint test. Statistical analyses included normality tests (Kolmogorov-Smirnov and Shapiro-Wilk), homogeneity tests, and paired t-tests. Results demonstrated that both sprint training protocols significantly improved sprint performance. Group A exhibited a mean improvement of 0.35 seconds, while Group B showed a greater improvement of 0.77 seconds, with both outcomes achieving statistical significance (p < 0.05). These findings indicate that sprint training over both distances effectively enhances speed performance in volleyball playersThe study concludes that incorporating 50-meter and 80-meter sprint training into volleyball conditioning programs can positively impact players’ physical speed. Coaches and trainers are encouraged to integrate these sprint protocols to improve essential skills such as spiking, passing, and blocking. For comprehensive development, sprint training should be complemented with agility drills and aerobic endurance exercises to meet the multifaceted physical demands of the sport. Keywords: Volleyball, Physical Fitness, Extracurricular, Sports Student, Athletes.
Enhancing Vertical Jump Performance in Adolescent Female Volleyball Athletes: Effects of Squat Jumps and Knee Tuck Jumps for Health Promotion Widiyawanti, Aprillia Setia; Wahyudi, Agung; Ockta, Yovhandra
Contagion: Scientific Periodical Journal of Public Health and Coastal Health Vol 7, No 2 (2025): CONTAGION
Publisher : Universitas Islam Negeri Sumatera Utara, Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30829/contagion.v7i2.24405

Abstract

This experimental study examines the effectiveness of two plyometric training methods, squat jumps and knee tuck jumps, in enhancing vertical jump performance among U-12 female volleyball athletes. Vertical jump ability plays a critical role in executing offensive techniques such as spiking and defensive maneuvers like blocking. Fourteen athletes from the Dissporsa Kendal volleyball club participated in the study and were assigned to two experimental groups through ordinal pairing. Group A underwent squat jump training, while Group B received knee tuck jump training, each over the course of 16 sessions. A pre-test/post-test design was employed to assess changes in vertical jump performance. Descriptive statistics indicated improvements in both groups. Group A’s average jump height increased from 27.83 cm to 31.50 cm (a 13.2% improvement), while Group B’s average rose from 27.17 cm to 30.58 cm (a 12.7% improvement). The mean increase in jump height was 3.67 cm for Group A and 3.41 cm for Group B. However, an independent samples t-test revealed no statistically significant difference between the post-test results of the two groups (p = 0.8306), suggesting that both training methods were equally effective in improving vertical jump performance. These findings support the inclusion of squat jumps and knee tuck jumps in youth training programs aimed at developing lower-body explosive power. Due to their simplicity and accessibility, these exercises offer practical benefits for coaches and trainers working with young athletes. Future research involving larger sample sizes and extended training durations is recommended to further investigate the long-term effects of plyometric training on athletic performance and injury prevention in youth sports. Keywords: Plyometric, Vertical Jump, Volleyball, Youth Athletes, Training.
Co-Authors Alficandra Hidayat, Joni Taufik Manurizal, Lolia Putra, Muarif Arhas Putri, Rahmah Evita Romandoni, Evi Saputri Wahyudi, Agung Widiyawanti, Aprillia Setia