Acute effect of heavy resistance exercise on vertical jump performance in young basketball players / Efeito agudo do exercício de força de alta intensidade no desempenho do salto vertical em jogadores de basquete jovens

O proposito do estudo foi comparar diferentes volumes de exercicio de forca de alta intensidade (EFAI) e periodos de recuperacao no desempenho do salto vertical de atletas de basquete jovens. Nove voluntarios saudaveis (seis homens e tres mulheres), jogadores de basquete da categoria juvenil (16±1 anos, altura de 1,72±0,09 m, massa corporal de 69,2±15,1 kg, percentual de gordura de 15,6±4,2%), realizaram cinco saltos contramovimento (SCM) e apos quatro minutos (4min) de recuperacao realizaram uma ou tres series de cinco repeticoes maximas (1X5RM ou 3X5RM) no meio agachamento. Quatro ou dez minutos apos o fim do exercicio agachamento os individuos realizaram novamente cinco SCM consecutivos. Nao foi observada diferenca (f=1.26, p=0.301) entre as condicoes (1x5RM e 3X5RM) no desempenho do SCM apos 4min do fim do exercicio agachamento. A condicao 3x5RM reduziu a altura do SCM 10min apos exercicio de agachamento (f=3.54, p=0.040). Baseado nos resultados, nos concluimos que o EFAI de baixo (1X5RM) ou alto (3X5RM) volume nao melhora o desempenho do salto vertical contramovimento, realizado apos 4min ou 10min de pausa em atletas de basquete jovens. ABSTRACT The aims of the study were to investigate whether heavy resistance exercise (HRE) induces increase in vertical jump (JP), and to compare the effects of different HRE volumes and recovery periods on vertical JP. Nine volunteers (six men and three women), young basketball players in the juvenile category (16±1 year-old age, height of 1,72±0,09 m, body mass of 69,2±15,1 kg, fat percentile of 15,6±4,2%), performed one set of five countermovement vertical jumps (CMJ) and after four minutes of interval they executed one or three set of 5RM back half-squat exercise. Four and 10 minutes after the end of the squat exercise, the individuals performed a second set of five CMJ. No significant statistical differences (f=1.26, p=0.301) were observed among conditions (one or three set of 5RM back half-squat exercise) in CMJ performance four minutes after the end of the squat exercise. The condition 3x5RM significantly reduced the height of CMJ 10 minutes after the HRE (f=3.54, p=0.040). Based on the results, we can conclude that low (1X5RM) or high (3X5RM) volume of HRE does not improve CMJ performance after four or 10 minutes of recovery. Besides, high volume of HRE (3X5RM) induced decrease of CMJ performance in recreationally trained young basketball players.