深部肌肉刺激对下肢运动性肌肉疲劳的恢复作用

Effect of Deep Muscle Stimulation on Recovery of Lower Extremity Motor Muscle Fatigue

DOI：10.12064/ssr.2022082402

英文关键词:exercise-induced fatigue deep muscle stimulation therapy muscle strength isokinetic muscle strength test knee extensor muscle group

基金项目:国家重点研发计划课题(2019YFF0301704)

作者	单位
尹贻锟	广西师范大学体育与健康学院,广西桂林 541006
王佳林	吉利学院体育与健康学院,四川成都 641423 ；成都体育学院运动医学与健康研究所,四川成都 610041
蒋夏天	成都体育学院附属体育医院,四川成都 610041
赵瑞静	成都体育学院运动医学与健康研究所,四川成都 610041
孙君志	成都体育学院运动医学与健康研究所,四川成都 610041

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中文摘要:

目的：探讨深部肌肉刺激(DMS)对下肢运动性肌肉疲劳的恢复作用。方法：共招募43名在校男大学生，随机分为DMS组和拉伸组，通过单膝跪地重复多次后仰的离心收缩运动对右侧伸膝肌群诱发运动性疲劳。分别在运动前、运动后即刻和运动后0.5 h、24 h和48 h，对受试者进行疼痛、疲劳和等速肌力测试。结果：(1)研究过程中，DMS组2名受试者脱落或剔除，拉伸组1名受试者脱落，最终DMS组20名、拉伸组20名受试者纳入统计分析。(2)等速向心收缩峰力矩、等速向心收缩平均峰力矩、等速向心收缩总功、自觉疲劳程度和主观疼痛感觉程度的时间主效应、组别主效应、时间组别交互作用均有统计学意义(P＜0.05)。(3)2组治疗后RPE评分相比运动后即刻有所降低(P＜0.05)，其中DMS组低于拉伸组(P＜0.05)。(4)2组治疗后VAS评分相比运动后即刻有所降低(P＜0.05)，其中DMS组低于拉伸组(P＜0.05)。(5)运动后即刻、0.5 h后测定等速向心收缩峰力矩、等速向心收缩平均峰力矩、等速向心收缩总功较运动前显著降低(P＜0.05)。DMS组恢复程度及速度明显高于拉伸组，运动后0.5 h、24 h、48 h，2组评分相比运动后即可有所升高，且存在显著性差异，具有统计学意义(P＜0.05)。DMS组VAS与等速向心收缩峰力矩每个时间段呈低中度相关(r=-0.577~-0.465，P＜0.05)。结论：DMS与拉伸均可恢复肌肉力量、缓解肌肉疼痛及疲劳，且DMS缓解速度明显快于拉伸，表明DMS对运动性疲劳后肌肉功能的恢复具有促进作用。

英文摘要:

Objective: To investigate the effect of DMS on the recovery of lower extremity exercise muscle fatigue. Methods: A total of 43 male college students were randomly divided into DMS group and stretch group. The centrifugal contractile exercise of kneeling on one knee repeated several times can induce exercise fatigue on the right extensor knee muscle group. The subjects were tested for pain, fatigue and isokinetic muscle strength before exercise, immediately after exercise, and 0.5 h, 24 h and 48 h after exercise. Results: (1) during the study, 2 subjects in the DMS group fell off or were eliminated, and 1 subject in the stretch group fell off. Finally, 20 subjects in the DMS group and 20 subjects in the stretch group were included in the statistical analysis. (2) The time main effect, group main effect, and time by group interaction of isokinetic centripetal contraction peak torque, average isokinetic centripetal contraction peak torque, total work of isokinetic centripetal contraction, perceived fatigue degree and subjective pain feeling degree were statistically significant (P＜0.05). (3) The RPE score of the two groups after treatment was significantly lower than that after exercise (P＜0.05), and the score of the DMS group was lower than that of the stretch group (P＜0.05). (4) The VAS score of the two groups after treatment was significantly lower than that after exercise (P＜0.05), and that of the DMS group was lower than that of the stretch group (P＜0.05). (5) The peak torque of isokinetic centripetal contraction, the average peak torque of isokinetic centripetal contraction and the total work of isokinetic centripetal contraction measured immediately and 0.5 h after exercise were significantly lower than those before exercise (P＜0.05). The degree and speed of recovery in the DMS group were significantly higher than those in the stretch group. At 0.5 h, 24 h, and 48 h after exercise, the scores of the two groups were significantly higher than those after exercise, and the difference was statistically significant (P＜0.05). In DMS group, there was a low to moderate correlation between VAS and the peak torque of isokinetic centripetal contraction at each time period (r=-0.465~-0.577, P＜0.05). Conclusion: Both DMS and stretch can restore muscle strength, relieve muscle pain and fatigue, and the relief speed of DMS is significantly faster than that of stretch, indicating that DMS can promote the recovery of muscle function after exercise fatigue.

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