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The Effect of Grip Strength and Anticipation on Spin Serve Effectiveness in Junior Tennis Players Ians Aprilo; Poppy Elisano Arfanda; M. Adam Mappaompo; Hasbi Asyhari; Muhammad Isnawan Syafir
Journal Physical Health Recreation (JPHR) Vol 6 No 1 (2025): Journal Physical Health Recreation (JPHR)
Publisher : Program Studi Pendidikan Jasmani Kesehatan dan Rekreasi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55081/jphr.v6i1.5200

Abstract

This study investigates the effect of racket grip strength and motion anticipation on the effectiveness of spin serves among junior tennis athletes in Makassar. Using a quantitative correlational design, 20 athletes aged 14–18 years participated. Grip strength was measured with a handgrip dynamometer, motion anticipation with a visual reaction test, and spin serve effectiveness through video analysis of accuracy, direction, and bounce. Multiple regression analysis (α = 0.05) showed that both variables significantly affected spin serve effectiveness (R² = 0.551; p < 0.05). Grip strength had a greater contribution (β = 0.46; p = 0.008) than motion anticipation (β = 0.39; p = 0.018). The findings highlight the importance of integrating physical and cognitive training to enhance spin serve performance in junior tennis athletes. Strength and anticipation training should be combined to optimize serve outcomes
The Impact of Frequency and Duration of Aerobic Dance on Cardiorespiratory Fitness in Adolescent Girls Poppy Elisano Arfanda; Ians Aprilo; M. Adam Mappaompo; Arimbi; Benny Badaru
Journal Physical Health Recreation (JPHR) Vol 6 No 1 (2025): Journal Physical Health Recreation (JPHR)
Publisher : Program Studi Pendidikan Jasmani Kesehatan dan Rekreasi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55081/jphr.v6i1.5201

Abstract

This study investigated the effect of aerobic dance frequency and duration on cardiorespiratory fitness in adolescent girls in Makassar. Using a quasi-experimental pre-test and post-test control design, 40 girls aged 17–22 were divided into experimental and control groups (n=20 each). The experimental group performed aerobic dance three times per week for 45–60 minutes over eight weeks, while the control group continued routine activities. Cardiorespiratory fitness was measured using the 12-minute Cooper Test. Data analysis included normality, homogeneity, paired t-tests, and independent t-tests. Results indicated a significant VO₂max improvement in the experimental group (Δ mean = +4.70; p < 0.001) compared to no significant change in the control group (Δ mean = -0.35; p > 0.05). The post-test difference between groups was also significant (t = -3.756; p < 0.001). Regular aerobic dance effectively enhances cardiorespiratory fitness in adolescent girls.