G-29 Free Communication/Slide - Enhancing Performance through Training Interventions Saturday, May 31, 2014, 9:00 AM - 10:45 AM Room: 305
PURPOSE: Because training or rehabilitating an athlete involves a progression of training programs specific to the athletes sport, it is important to understand how different training programs effect performance and minimize injury risk. Because enhancing trunk strength & power may enhance performance and decrease injury risk in baseball players, this study compared the effects of 3 baseball-specific 6-week training programs on trunk strength & power.
METHODS: Sixty-eight high school baseball players (14-17 yo) were randomly & equally divided into 3 training groups & a non-training control (CON) group. The 3 training groups were the Throwers Ten (TT) (slower controlled motion exercises using body weight, dumbbells, & tubing), Keiser Pneumatic (KP) (explosive motion exercises using constant air resistance machines), & Plyometric (PLY) (explosive motion exercises using 4-8 lb medicine balls & tubing). Each training group trained 3 days/week for 6 weeks, comprised of a 5-10 min warm-up & cool-down and 45 min of resistance training (2 sets of 6-12 reps). At the beginning and end of the training session, trunk strength & power were assessed in the 3 training groups and CON group during rotational and overhead maximum efforts 3 lb and 6 lb medicine balls throws for distance, as well as prone plank and side plank isometric holds for time. A two-factor repeated measures analysis of variance was used to assess strength & power differences (p < 0.05).
RESULTS: All 3 training groups had significantly greater increases in trunk strength & power after the 6 week training program, demonstrating approximately 10-25% greater trunk strength during the prone and side plank tests and approximately 10-15% greater trunk power during the rotational and overhead medicine ball tests. There were no significant differences in all trunk strength and power pre-test and post-test values in the CON group.
CONCLUSIONS: All 3 training programs, but not the CON group, were effective in increasing trunk strength and power. Overall, the TT group was most effective in increasing trunk strength, while the KP & PLY groups were most effective in increasing trunk power. As high school baseball players develop into stronger & more powerful athletes, the risk of injury may decrease and their performance may increase.