alexa Physiological changes with periodized resistance training in women tennis players.
Physicaltherapy & Rehabilitation

Physicaltherapy & Rehabilitation

Journal of Sports Medicine & Doping Studies

Author(s): Kraemer WJ, Hakkinen K, TriplettMcbride NT, Fry AC, Koziris LP,

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Abstract PURPOSE: To compare the physiological and performance adaptations between periodized and nonperiodized resistance training in women collegiate tennis athletes. METHODS: Thirty women (19 +/- 1 yr) were assigned to either a periodized resistance training group (P), nonperiodized training group (NV), or a control group (C). Assessments for body composition, anaerobic power, VO2(max), speed, agility, maximal strength, jump height, tennis-service velocity, and resting serum hormonal concentrations were performed before and after 4, 6, and 9 months of resistance training performed 2-3 d.wk (-1). RESULTS: Nine months of resistance training resulted in significant increases in fat-free mass; anaerobic power; grip strength; jump height; one-repetition maximum (1-RM) leg press, bench press, and shoulder press; serve, forehand, and backhand ball velocities; and resting serum insulin-like growth factor-1, testosterone, and cortisol concentrations. Percent body fat and VO2(max) decreased significantly in the P and NV groups after training. During the first 6 months, periodized resistance training elicited significantly greater increases in 1-RM leg press (9 +/- 2 vs 4.5 +/- 2\%), bench press (22 +/- 5 vs 11 +/- 8\%), and shoulder press (24 +/- 7 vs 18 +/- 6\%) than the NV group. The absolute 1-RM leg press and shoulder press values in the P group were greater than the NV group after 9 months. Periodized resistance training also resulted in significantly greater improvements in jump height (50 +/- 9 vs 37 +/- 7\%) and serve (29 +/- 5 vs 16 +/- 4\%), forehand (22 +/- 3 vs 17 +/- 3\%), and backhand ball velocities (36 +/- 4 vs 14 +/- 4\%) as compared with nonperiodized training after 9 months. CONCLUSIONS: These data demonstrated that periodization of resistance training over 9 months was superior for enhancing strength and motor performance in collegiate women tennis players. This article was published in Med Sci Sports Exerc and referenced in Journal of Sports Medicine & Doping Studies

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