Jafari Mahsa, Zolaktaf Vahid, Marandi Sayyed M
Department of Exercise Rehab, Faculty of Exercise Sciences, University of Isfahan, Isfahan, Iran.
Int J Prev Med. 2013 Apr;4(Suppl 1):S104-9.
Athletic performance in many sports depends on two-legged vertical jump. The objective of this study was to examine the effect of different pre-jump height exercises on two-legged vertical jump and to determine the best pre-jump height(s).
Subjects included 35 females and 42 males. By matched randomized sampling, subjects of each sex were assigned into four groups, namely, control, 10-cm hurdle, 20-cm hurdle, and 30-cm hurdle. They participated in the same training program for 6 weeks. Statistical analyses were based on one-way and repeated-measure analysis of variance (ANOVA).
Analysis of the data showed that practice over hurdles of 10 cm was better than no hurdle and hurdles of >10 cm. Also, jump attempts over hurdles were efficient for trained athletes, but not for untrained athletes. For both sexes, the rate of spike improvement was much better in the experimental groups than in the control groups; it was independent from the rate of progress in jump, which was relatively less evident.
It is likely that rather than increasing jump height, training over hurdle enabled the players to use a higher percent of their jump potentials.
许多运动项目中的运动表现取决于双腿垂直跳跃。本研究的目的是检验不同预跳高度练习对双腿垂直跳跃的影响，并确定最佳预跳高度。
受试者包括35名女性和42名男性。通过匹配随机抽样，将每种性别的受试者分为四组，即对照组、10厘米跨栏组、20厘米跨栏组和30厘米跨栏组。他们参加相同的训练计划，为期6周。统计分析基于单向和重复测量方差分析（ANOVA）。
数据分析表明，在10厘米跨栏上的练习比无跨栏和高于10厘米的跨栏更好。此外，对训练有素的运动员来说，跨栏跳跃尝试是有效的，但对未受过训练的运动员则不然。对于男女两性，实验组的成绩提高率比对照组好得多；它与跳跃进步率无关，而跳跃进步率相对不明显。
跨栏训练可能不是增加跳跃高度，而是使运动员能够更高比例地发挥其跳跃潜力。
