Acute effects of 15 min static or contract-relax stretching modalities on plantar flexors neuromuscular properties
Acute effects of 15 min static or contract-relax stretching modalities on plantar flexors neuromuscular properties
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DOI：
10.1016/j.jsams.2008.12.633
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发表时间：
2010-03-01
影响因子：
4
通讯作者：
Desbrosses, Kevin
中科院分区：
文献类型：
--
作者：
Babault, Nicolas;Kouassi, Blah Y. L.;Desbrosses, Kevin
本研究旨在探讨15分钟静态或次最大收缩-放松拉伸模式对跖屈肌神经肌肉特性的即时影响。10名男性志愿者在15分钟的足底屈肌静态或收缩-放松拉伸程序（20次拉伸）之前和之后立即进行测试。静态拉伸包括30 s拉伸到不舒服的程度。对于收缩-放松拉伸模式，受试者在24 s静态拉伸之前进行6 s次最大等长跖屈。测量包括最大随意等长扭矩（MVT）和相应的比目鱼肌（SOL）和内侧腓肠肌（MG）肌肉（RMS值）的肌电图活动，以及最大峰值扭矩（Pt）在休息时引起的单次超大电刺激胫神经。拉伸15分钟后，MVT和SQL RMS显著降低（分别为-6.9 +/-11.6%和6.5 +/-15.4%）。两种伸展方式之间没有差异。拉伸后，Pt保持不变。MG RMS变化在拉伸模式之间存在显著差异（静态和收缩-放松拉伸模式后分别为-9.4 +/- 18.3%和+3.5 +/- 11.6%）。这些研究结果表明，进行15分钟的静态或收缩-放松拉伸足底屈肌的扭矩生产能力的不利影响，应在比赛前排除。解释这种变化的机制似乎是拉伸模态依赖。(C)2009年澳大利亚运动医学。由爱思唯尔有限公司发布。保留所有权利。
The present study aimed to investigate the immediate effects of 15 min static or sub-maximal contract-relax stretching modalities on the neuromuscular properties of plantar flexor muscles. Ten male volunteers were tested before and immediately after 15 min static or contract-relax stretching programs of plantar flexor muscles (20 stretches). Static stretching consisted in 30 s stretches to the point of discomfort. For the contract-relax stretching modality, subjects performed 6 s sub-maximal isometric plantar flexion before 24 s static stretches. Measurements included maximal voluntary isometric torque (MVT) and the corresponding electromyogsraphic activity of soleus (SOL) and medial gastrocnemius (MG) muscles (RMS values), as well as maximal peak torque (Pt) elicited at rest by single supramaximal electrical stimulation of the tibial nerve. After 15 min stretching, significant MVT and SQL RMS decreases were obtained (-6.9 +/- 11.6% and 6.5 +/- 15.4%, respectively). No difference was obtained between stretching modalities. Pt remained unchanged after stretching. MG RMS changes were significantly different between stretching modalities (-9.4 +/- 18.3% and +3.5 +/- 11.6% after static and contract-relax stretching modalities, respectively). These findings indicated that performing 15 min static or contract-relax stretching had detrimental effects on the torque production capacity of plantar flexor muscles and should be precluded before competition. Mechanisms explaining this alteration seemed to be stretch modality dependent. (C) 2009 Sports Medicine Australia. Published by Elsevier Ltd. All rights reserved.