INFLUENCE OF THE INTENSITY OF SQUAT EXERCISES ON THE SUBSEQUENT JUMP PERFORMANCE
INFLUENCE OF THE INTENSITY OF SQUAT EXERCISES ON THE SUBSEQUENT JUMP PERFORMANCE
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DOI：
10.1519/jsc.0000000000000409
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发表时间：
2014-08-01
影响因子：
3.2
通讯作者：
Kawakami, Yasuo
中科院分区：
文献类型：
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作者：
Fukutani, Atsuki;Takei, Seiichiro;Kawakami, Yasuo
蹲起练习可以提高跳跃能力，这被认为是由于激活后增强（PAP）现象。然而，深蹲练习强度对跳跃成绩提高的影响及其与PAP的关系尚未阐明。因此，我们研究了深蹲练习强度对随后的跳跃性能和PAP的大小的影响。8名举重运动员（年龄19.8 ± 1.3岁，身高1.67 ± 0.07 m，体重77.1 ± 14.8 kg）被招募为受试者。深蹲运动的强度设定在两种条件下：重条件（HC）（45% 1次重复最大值[1RM] x 5次重复[reps]，60% 1RM x 5次重复，75% 1RM x 3次重复和90% 1RM x 3次重复）和中等条件（MC）（45% 1RM x 5次重复，60% 1RM x 5次重复和75% 1RM x 3次重复）。在下蹲练习之前和之后，受试者进行3次反向运动跳跃。此外，抽搐收缩同时引起之前和之后的深蹲练习。在这两种情况下，与之前记录的相比，深蹲练习后记录的抽搐扭矩和跳跃高度显著增加。在两个抽搐扭矩和跳跃高度增加的程度显着更大的HC比MC。因此，我们的结论是，高强度的蹲下练习是优于中等强度的蹲下练习作为热身方式，以提高随后的跳跃性能。
Jump performance can be enhanced after performing squat exercises, and this is thought to be because of the phenomenon of postactivation potentiation (PAP). However, the influence of the intensity of squat exercises on jump performance enhancement and its association to PAP have not been elucidated. Thus, we examined the influence of the intensity of squat exercises on the subsequent jump performance and the magnitude of PAP. Eight weightlifters (age, 19.8 +/- 1.3 years; height, 1.67 +/- 0.07 m; body mass, 77.1 +/- 14.8 kg) were recruited as subjects. The intensity of squat exercises was set in 2 conditions: heavy condition (HC) (45% 1 repetition maximum [1RM] x 5 repetitions [reps], 60% 1RM x 5 reps, 75% 1RM x 3 reps, and 90% 1RM x 3 reps) and moderate condition (MC) (45% 1RM x 5 reps, 60% 1RM x 5 reps, and 75% 1RM x 3 reps). Before and after the squat exercises, the subjects performed countermovement jumps 3 times. In addition, a twitch contraction was concurrently elicited before and after the squat exercises. In both conditions, twitch torque and jump height recorded after the squat exercises increased significantly compared with those recorded beforehand. The extents of increase in both twitch torque and jump height were significantly larger in HC than in MC. We conclude therefore that a high-intensity squat exercise is better than a moderate-intensity squat exercise as a warm-up modality for enhancing subsequent jump performance.