Effects of Drop Jump Training from Different Heights and Weight Training on Vertical Jump and Maximum Strength Performance in Female Volleyball Players

• Autores: Konstantinos Sotiropoulos, Ilias Smilios, Karolina G. Barzouka, Marios Christou, Gregory C. Bogdanis, Helen T. Douda, Savvas P. Tokmakidis
• Localización: Journal of strength and conditioning research: the research journal of the NSCA, ISSN 1064-8011, Vol. 37, Nº. 2, 2023, págs. 423-431
• Idioma: inglés
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• Resumen

  • This study compared the effects of drop jump (DJ) training from different drop heights and weight training on vertical jump and maximum strength performance. Fifty-five female volleyball players (age: 23.8 ± 4.3 years) were randomly and equally allocated to a control group (volleyball training, CG); a volleyball and weight training group (WG); and 3 volleyball, weight, and drop jump training groups. One group performed DJ training from the optimal drop height, i.e., the height that elicited the highest ratio of jump height to contact time (OG), a second group from a drop height 25% higher than the optimal (HG), and a third group from a drop height 25% lower than the optimal (LG). Drop jump and weight training were performed 1–2 times per week, for 8 weeks for a total of 13 sessions. After training, vertical jump performance improved by 3.6–17.4% (p < 0.05; effect size [ES]: 1.03–1.23) in the OG and the HG compared with the LG, WG, and CG (p < 0.05; ES: 0.03–0.58). Drop jump height from drop heights 20–70 cm increased by 10.0–20.2% (p < 0.05; ES: 0.59–1.13) for the OG and the HG, while reactive strength index increased (p < 0.05; ES: 0.74–1.40) by 19.6–33.9% only in the HG compared with the CG. Half-squat maximum strength was increased in all experimental groups by 17.4–19% compared with the CG (p < 0.05) with no differences (p > 0.05) observed among them. The use of the optimal height or a moderately higher drop height by 25% for DJ training, combined with weight training, seems to be the most beneficial option to improve vertical jump and reactive strength index in female volleyball players.