Research Laboratory Sport Performance Optimization National Center of Medicine and Sciences in Sport (CNMSS), Tunis, Tunisia.
PLoS One. 2013 Aug 5;8(8):e70534. doi: 10.1371/journal.pone.0070534. Print 2013.
The present study addressed the lack of data on the effect of different types of stretching on diurnal variations in vertical jump height - i.e., squat-jump (SJ) and countermovement-jump (CMJ). We hypothesized that dynamic stretching could affect the diurnal variations of jump height by producing a greater increase in short-term maximal performance in the morning than the evening through increasing core temperature at this time-of-day.
Twenty male soccer players (age, 18.6±1.3 yrs; height, 174.6±3.8 cm; body-mass, 71.1±8.6 kg; mean ± SD) completed the SJ and CMJ tests either after static stretching, dynamic stretching or no-stretching protocols at two times of day, 07:00 h and 17:00 h, with a minimum of 48 hours between testing sessions. One minute after warming-up for 5 minutes by light jogging and performing one of the three stretching protocols (i.e., static stretching, dynamic stretching or no-stretching) for 8 minutes, each subject completed the SJ and CMJ tests. Jumping heights were recorded and analyzed using a two-way analysis of variance with repeated measures (3 [stretching]×2 [time-of-day]).
The SJ and CMJ heights were significantly higher at 17:00 than 07:00 h (p<0.01) after the no-stretching protocol. These daily variations disappeared (i.e., the diurnal gain decreased from 4.2±2.81% (p<0.01) to 1.81±4.39% (not-significant) for SJ and from 3.99±3.43% (p<0.01) to 1.51±3.83% (not-significant) for CMJ) after dynamic stretching due to greater increases in SJ and CMJ heights in the morning than the evening (8.4±6.36% vs. 4.4±2.64%, p<0.05 for SJ and 10.61±5.49% vs. 6.03±3.14%, p<0.05 for CMJ). However, no significant effect of static stretching on the diurnal variations of SJ and CMJ heights was observed.
Dynamic stretching affects the typical diurnal variations of SJ and CMJ and helps to counteract the lower morning values in vertical jump height.
本研究旨在解决缺乏不同类型拉伸对垂直跳跃高度日变化影响的数据问题，即深蹲跳（SJ）和下蹲跳（CMJ）。我们假设，通过在一天中的这个时候提高核心体温，动态拉伸可以通过在早上产生比晚上更大的短期最大性能提升，从而影响跳跃高度的日变化。
20 名男性足球运动员（年龄 18.6±1.3 岁；身高 174.6±3.8 厘米；体重 71.1±8.6 公斤；平均值±标准差）在 07:00 小时和 17:00 小时两次在一天内完成 SJ 和 CMJ 测试，两次测试之间至少间隔 48 小时。在进行 5 分钟的轻松慢跑热身和进行 8 分钟的三种拉伸方案（即静态拉伸、动态拉伸或无拉伸）之一后，每个受试者都完成了 SJ 和 CMJ 测试。使用双向重复测量方差分析（3 [拉伸]×2 [时间]）记录和分析跳跃高度。
在无拉伸方案后，SJ 和 CMJ 高度在 17:00 时显著高于 07:00 时（p<0.01）。这些日常变化消失了（即 SJ 的日增益从 4.2±2.81%（p<0.01）减少到 1.81±4.39%（无显著意义），CMJ 的日增益从 3.99±3.43%（p<0.01）减少到 1.51±3.83%（无显著意义）），因为 SJ 和 CMJ 高度在早上的增长幅度大于晚上（8.4±6.36%对 4.4±2.64%，p<0.05 用于 SJ 和 10.61±5.49%对 6.03±3.14%，p<0.05 用于 CMJ）。然而，静态拉伸对 SJ 和 CMJ 高度的日变化没有显著影响。
动态拉伸会影响 SJ 和 CMJ 的典型日变化，并有助于抵消垂直跳跃高度在早上较低的值。
