Affiliations: [a] Department of Physical Education and Sports, Movement and Training Sciences, Institute of Health Sciences, Marmara University, Istanbul, Turkey | [b] Fahreddin Kerim Gokay Anatolian High School, Istanbul, Turkey | [c] Star Youth and Sports Club, Istanbul, Turkey | [d] Department of Coaching Education, Movement and Training Sciences, Faculty of Sports Sciences, Marmara University, Istanbul, Turkey | [e] Department of Coaching Education, Sports Health Sciences, Faculty of Sports Sciences, Marmara University, Istanbul, Turkey
Correspondence:
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Corresponding author: Ani Agopyan, Marmara University Faculty of Sport Sciences, Department of Coaching Education, Movement and Training Sciences, Goksu Mah. Cuma Yolu Cad. No: 1 Marmara Universitesi Anadoluhisarı Yerleskesi Spor Bilimleri Fakultesi PK. 34815, Istanbul, Turkey. Tel.: +90 216 777 4433; Fax: +90 216 332 1620; E-mail: aniagopyan@marmara.edu.tr. https://orcid.org/0000-0001-6407-4648.
Abstract: BACKGROUND: Limited research exists on how various resistance training methods, such as TRX and dumbbells, impact sport-specific technical skills and muscle performance in young athletes. OBJECTIVE: This study aimed to compare the effects of 8-week Total-Body Resistance Exercise (TRX) suspension training and Traditional Dumbbell Training (TDT) on shoulder muscle strength, leg power, and spike speed in young male volleyball players. METHODS: Twenty-five male volleyball players were randomly assigned to either the TRX suspension group (n= 13) or the TDT group (n= 12). Anthropometric measures, countermovement jump (CMJ) height, spike speed, and shoulder joint isokinetic strength tests were conducted pre- and post-intervention. Both groups continued their volleyball training (5 days/week) and added TRX or TDT sessions for 2 months (60–90 minutes/day, 3 times/week), including 8 multi-joint exercises (1–3 sets/12 reps, 60 min rest). Statistical analysis involved Mann-Whitney and Wilcoxon tests, with effect size calculations. RESULTS: Compared to the TDT group, the TRX group showed significant improvements in CMJ height (+12.17% vs. +0.83%; p= 0.001), CMJ power (+9.55% vs. -0.24 %; p= 0.01), and spike speed (+11.49% vs. +6.82%; p= 0.03) with a small to moderate effect size. CONCLUSIONS: In young male volleyball players, TRX suspension training may be more effective than dumbbell training in enhancing jump performance and spike speed.
Keywords: Countermovement jump, spike velocity, strength, team sports, total body resistance exercise
