Effect of leg support on muscle cross-correlation of bilateral erector spinae during trunk flexion–extension performance

Xin-hai, Shan; Wei, Yugang; Chen, Zhentao; Fan, Lixia; Shi, Weifei; Yang, Shulong

doi:10.1016/j.gaitpost.2013.06.019

Cited by 5 publications

(3 citation statements)

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“…For each trial, the MAV was normalized to the MVC value to get EMG amplitude (% MVC) bilaterally. Then, EMG amplitudes from bilateral ES muscles were averaged to represent the bilateral ES muscle activations [ 17 , 27 ]. A threshold level of 3% of the MVC was used to determine the relaxation period (the beginning and the end of the myoelectric activity) (Fig.…”

Section: Methodsmentioning

confidence: 99%

Spasm and flexion-relaxation phenomenon response to large lifting load during the performance of a trunk flexion-extension exercise

Xin-hai

2017

BMC Musculoskelet Disord

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BackgroundThe flexion relaxation phenomenon (FRP) has been widely investigated. Nevertheless, no study has been reported on the FRP as well as spasm response to large lifting load. The aim of this study was to evaluate the effect of large lifting load on the FRP response and spasm during execution of a flexion-extension exercise.MethodsTwenty-two healthy male university students without low back pain history participated this study. Subjects randomly performed three trials of trunk flexion-extension cycles of 5 s flexion and 5 s extension in each of 4 conditions (three large lifting loads of 15, 20 and 25 kg and one lifting load of 0 kg for comparison). Surface EMG from bilateral erector spinae was recorded during the performance of a trunk anterior flexion-extension exercise. The relaxation phase was determined through the onset of electromyography (EMG) signals. Spasm was evaluated in the relaxation period. The mean normalized electromyography (NEMG) was derived from the raw EMG.ResultsSpasm was observed in more than 45% of the individuals and the intensity of muscle activation was increased by more than 78% in the relaxation phase.ConclusionsA large lifting load could lead to a high prevalence of spasms as well as a high intensity of muscle activations on erector spinae muscle in the relaxation period, which may be associated with the development of low back disorder during the performance of a flexion-extension exercise.

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Section: Methodsmentioning

confidence: 99%

Spasm and flexion-relaxation phenomenon response to large lifting load during the performance of a trunk flexion-extension exercise

Xin-hai

2017

BMC Musculoskelet Disord

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“…The on side TT task during weight bearing and one side FTT task during weight bearing postures refer to the support of more than 55% of the body weight [10]. Each condition was repeated three times, and trunk flexion and extension was maintained for 5 seconds during the TT task posture.…”

Section: One Side Forward Toe Touch (Ftt) Task During Weight Bearingmentioning

confidence: 99%

“…Hodges and Richardson [9] studied the changes in order of mobilization of trunk muscles. In addition, Shan et al [10] and others have been conducting various studies on muscle activity and movement patterns through dynamic tasks such as studying the onset time through flexion to extension. Previous studies on muscle activity, muscle initiation time, and muscle relaxation through general toe touch (GTT) tasks have been actively conducted, but studies that include and apply environmental factors that may influence trunk extension are lacking.…”

Section: Introductionmentioning

confidence: 99%

Effect of leg weight shifting on muscle activation of the trunk and lower extremity during trunk flexion and extension performance

Shim

Chung

2018

PTRS

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Objective: To investigate the effect of performing three different toe touch (TT) task condition on the activities of four different muscles using surface electromyography (sEMG) in healthy young adults. Design: Cross-sectional study. Methods: A total of 20 healthy young adults (6 males, 14 females) voluntarily participated in this study. All subject randomly performed three different TT task conditions as follows: general toe-touch (GTT) task, one side toe touch (TT) task during weight bearing, and one side foward toe touch (FTT) task during weight bearing. The muscle activities of erector spinae (ES), gluteus maximus (GM), hamstring (HAM), tibialis anterior (TA) muscles during the TT task were measured using sEMG. Subject performed each of the three conditions three time in random order and mean values were obtained. Results: With the trunk flexion period, the TT and FTT showed significantly greater muscle activity in the GM, HAM and TA compared to the GTT task (p<0.05). The TT position showed significantly greater HAM muscle activity than the GTT position. The dominant and nondominant ES muscle activity was significantly greater in the FTT compared to the GTT position (p<0.05). The dominant GM, HAM, and TA was significantly greater in the TT and FTT compared to the GTT position (p<0.05). Although the dominant ES was significantly greater in the TT and FTT compared to the GTT position (p<0.05), the dominant GM muscle activity was signifcantly greater in the TT compared with the GTT position (p<0.05). Conclusions: These findings may be applicable within the clinical field for selective trunk and lower extremity muscle activation and basic biomechanics purpose.

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Sequencing of superficial trunk muscle activation during range-of-motion tasks

Schinkel-Ivy

Drake

2015

Human Movement Science

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Effect of leg support on muscle cross-correlation of bilateral erector spinae during trunk flexion–extension performance

Cited by 5 publications

References 30 publications

Spasm and flexion-relaxation phenomenon response to large lifting load during the performance of a trunk flexion-extension exercise

Spasm and flexion-relaxation phenomenon response to large lifting load during the performance of a trunk flexion-extension exercise

Effect of leg weight shifting on muscle activation of the trunk and lower extremity during trunk flexion and extension performance

Sequencing of superficial trunk muscle activation during range-of-motion tasks

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