MEDICINE AND SCIENCE IN SPORTS AND EXERCISE
Volumen: 49, Numero: 5, Páginas: 1085 pp.
PURPOSE: : The recreational and competitive practice of acrobatic sports, that is, trampoline, is growing rapidly around the world. The trampoline is a gymnastic implement used for learning acrobatic skills in children?s gymnastics. However, few studies investigating its application for the development of the power of lower limbs. Thus, the aim of this study was to analyze the effect of an intervention program based on trampoline training on lower limbs in children?s gymnasts. METHODS: A total of 20 gymnasts children (age: 8.00±1.71 years) participated in the study. The power of lower limbs was evaluated before and after an intervention of 8 weeks (3 days/week, 1 h/session) based on training trampoline. Leg power was assessed by Bosco test with the battery Squat Jump (SJ) and Countermovement jump (CMJ) by jumping platform (Axon Jump, software 4.0). The jump time, jump height and speed takeoff were evaluated for both batteries jump. The technical implementation of vertical jump in trampoline was evaluated by scoring code of the International Federation of Trampoline (range of score from 0 to 10). The weight, heigth and the attendance during the intervention were also analyzed. Paired-samples Student t-test was use for comparing the means of the normal study variables pre and post intervention. Wilcoxon test was used for non-normal variables. Statistical analysis was performed using SPSS (v.22, IBM, USA). The value of significance was p <0.05. RESULTS: Post-intervention, SJ significantly increased the flight time (MD=39.2±17.19 ms; p<0.001) and the jump height (MD=4.22±1.88 cm, p <0.001). However, there were no significant differences post-intervention in the variable speed off in SJ. In the CMJ, the time of flight and jump height significantly increased (MD=41.8±25.97 ms; p<0.001; MD=4.88±3.13 cm; p<0.001, respectively). Moreover, the takeoff speed decreased significantly (MD=0.73±0.93 ms, p<0.01). There were no significant differences in the technical implementation of vertical jump in trampoline. CONCLUSIONS: An 8-weeks of trampoline training improved the power of the lower limbs in gymnasts children increasing the time of flight, height of jump in SJ, and all the variables studied in CMJ.