Effects of six weeks of depth jump vs. countermovement jump training on sand on muscle soreness and performance/Ucinci sest tjedana treninga dubinskih skokova i skokova s pripremom na pijesku na misicni zamor i izvedbu

• Published in: Kinesiology (Zagreb, Croatia) Croatia), 2014-01, Vol.46 (1), p.97
• Main Authors: Mirzaei, Bahman, Norasteh, Ali Asghar, de Villarreal, Eduardo Saez, Asadi, Abbas
• Format: Article
• Language: English
• Subjects: Jumping; Muscle strength; Physiological research; Plyometric exercises
• ISSN: 1331-1441

The purpose of this study was to examine the effects of six weeks of depth jump (DJ) vs. countermovement jump (CMJ) training on sand on muscle soreness, jump, sprint, agility and leg press strength. Thirty healthy men (age 20.4±1.1 years; height 177.4±5.1 cm; mass 72.8±9.7 kg) volunteered to participate and were randomly assigned to one of three groups: DJ training group (n=10), CMJ training group (n=10) or control group (n=10). The experimental groups performed either DJ or CMJ training two days a week for six weeks. The training program included five sets of 20 repetitions DJ (from the height of a 45-cm box) or CMJ exercise onto 20 cm of dry sand. Assessments of Vertical Jump Test (VJT), Standing Long Jump Test (SLJT), 20 and 40 m sprints, T-Test (TT), Illinois Agility Test (IAT), and one-repetition maximum Leg Press ([1RM.sub.LP]) were performed a week before and following the 6-week training period. Muscle soreness was also measured pre, immediately post, 24 and 48 hours after the first and last training sessions. Significant increases were observed in both the DJ and CMJ groups in VJT (16.2 vs. 13.5%), and SLJT (13.9 vs. 14.4%) (p