ArticleBMC musculoskeletal disorders2017
Spasm and flexion-relaxation phenomenon response to large lifting load during the performance of a trunk flexion-extension exercise.
Article in BMC musculoskeletal disorders, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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Who cites it
4 citing papers in PubMed.
- Spasm and electromyography intensity of bilateral extensor during relaxation period in trunk anterior flexion-extension performance response to sustained asymmetry spinal loading.BMC musculoskeletal disorders · 2025Article
- The Application of Surface Electromyography Technology in Evaluating Paraspinal Muscle Function.Diagnostics (Basel, Switzerland) · 2024Review
- Comparison of flexion relaxation phenomenon between female yogis and matched non-athlete group.BMC sports science, medicine & rehabilitation · 2022Article
- Assessing aberrant muscle activity patterns via the analysis of surface EMG data collected during a functional evaluation.BMC musculoskeletal disorders · 2019Article
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2 authors.
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Abstract
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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