Acute effects of passive stretching on the electromechanical delay and evoked twitch properties

被引：0
作者：
Pablo B. Costa
Eric D. Ryan
Trent J. Herda
Ashley A. Walter
Katherine M. Hoge
Joel T. Cramer
机构：
[1] University of Oklahoma,Biophysics Laboratory, Department of Health and Exercise Science
[2] Oklahoma State University,Applied Musculoskeletal & Human Physiology Research Lab
[3] University of Oklahoma,Department of Health and Exercise Science
来源：
European Journal of Applied Physiology | 2010年 / 108卷
关键词：
Electromyography; Rate of force development; Electrical stimulation; Mechanical properties; Muscle mechanics;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The purpose of this study was to investigate the acute effects of passive stretching on the electromechanical delay (EMD), peak twitch force (PTF), rate of force development (RFD), and compound muscle action potential (M-wave) amplitude during evoked twitches of the plantar flexor muscles. 16 men (mean age ± SD = 21.1 ± 1.7 years; body mass = 75.9 ± 11.4 kg; height = 176.5 ± 8.6 cm) participated in this study. A single, square-wave, supramaximal transcutaneous electrical stimulus was delivered to the tibial nerve before and after passive stretching. The stretching protocol consisted of nine repetitions of passive assisted stretching designed to stretch the calf muscles. Each repetition was held for 135 s separated by 5–10 s of rest. Dependent-samples t tests (pre- vs. post-stretching) were used to analyze the EMD, PTF, RFD, and M-wave amplitude data. There were significant changes (P ≤ 0.05) from pre- to post-stretching for EMD (mean ± SE = 4.84 ± 0.31 and 6.22 ± 0.34 ms), PTF (17.2 ± 1.3 and 15.6 ± 1.5), and RFD (320.5 ± 24.5 and 279.8 ± 28.2), however, the M-wave amplitude did not change (P > 0.05). These findings suggested that passively stretching the calf muscles affected the mechanical aspects of force production from the onset of the electrically evoked twitch to the peak twitch force. These results may help to explain the mechanisms underlying the stretching-induced force deficit that have been reported as either “mechanical” or “electrical” in origin.
引用
收藏
页码：301 / 310
页数：9
相关论文
共 249 条
[21]  
Behm DG(2009)Paired changes in electromechanical delay and musculo-tendinous stiffness after endurance or plyometric training Eur J Appl Physiol 105 131-139
[22]  
Bambury A(2005)Force–time curve characteristics of dynamic and isometric muscle actions of elite women olympic weightlifters J Strength Cond Res 19 741-748
[23]  
Cahill F(2008)Acute effects of static versus dynamic stretching on isometric peak torque, electromyography, and mechanomyography of the biceps femoris muscle J Strength Cond Res 22 809-817
[24]  
Power K(2007)A comparison of voluntary and involuntary measures of electromechanical delay Int J Neurosci 117 597-604
[25]  
Blanpied P(2006)Peak force and rate of force development during isometric and dynamic mid-thigh clean pulls performed at various intensities J Strength Cond Res 20 483-491
[26]  
Oksendahl H(1998)Acute muscle stretching inhibits maximal strength performance Res Q Exerc Sport 69 411-415
[27]  
Cavanagh PR(2001)Influence of static stretching on viscoelastic properties of human tendon structures in vivo J Appl Physiol 90 520-527
[28]  
Komi PV(2006)Effects of neuromuscular training on the reaction time and electromechanical delay of the peroneus longus muscle Arch Phys Med Rehabil 87 395-401
[29]  
Cè E(1996)Biomechanical responses to repeated stretches in human hamstring muscle in vivo Am J Sports Med 24 622-628
[30]  
Paracchino E(2005)Acute Effects of Static and Proprioceptive Neuromuscular Facilitation Stretching on Muscle Strength and Power Output J Athl Train 40 94-103
12345678910