核心稳定训练动作中不同肌肉疲劳度的差异分析

Difference analysis of muscle fatigue during the exercises of core stability training

本文通过采集6种核心稳定训练动作过程中的肌电信号,分析得出特定肌肉在不同动作下的疲劳状态。试验中,30名受试者完成6种核心稳定训练动作,分别是平板支撑、仰卧双桥、仰卧单桥(左、右侧交替)和两点交叉支撑(左、右侧交替),每种动作持续1 min,两种动作之间间隔2 min。测量肌肉为身体左、右侧的竖脊肌、腹外斜肌、腹直肌、股直肌、股二头肌、胫骨前肌和腓肠肌。采用中位频率的斜率值表征肌肉的疲劳状态,结果显示,在完成核心训练动作过程中仰卧双桥和仰卧单桥能引起竖脊肌更大的疲劳,平板支撑引起腓肠肌的疲劳度较大,而腹直肌的疲劳度在平板支撑与其它5种动作之间差异均具有统计学意义(P<0.05);在6种核心稳定训练动作中,所测肌肉左、右侧疲劳度差异无统计学意义(P>0.05)。本研究所得结论,为核心稳定训练动作针对不同肌肉块的训练效果提供了量化指导。

The present study was carried out with the surface electromyography signal of subjects during the time when subjects did the exercises of the 6 core stabiiity trainings. We analyzed the different activity level of surface electromyography signal, and finally got various fatigue states of muscles in different exercises. Thirty subjects completed exercises of 6 core stability trainings, which were prone bridge, supine bridge, unilateral bridge （divided into two trainings, i.e. the left and right sides alternatively） and bird-dog （divided into two trainings, i.e. the left and right sides alternatively）,respectively. Each exercise was held on for 1 minute and 2 minutes were given to relax between two exercises in this test. We measured both left and right sides of the body＇s muscles, which included erector spina, external oblique, rectus abdominis, rectus femoris, biceps femoris, anterior tibial and gastrocnemius muscles. We adopted the frequency domain characteristic value of the surface electromyography signal, i.e. median frequency slope to analyze the muscle fatigue in this study. In the present paper, the results exhibit different fatigue degrees of the above muscles during the time when they did the core stability rehabilitation exercises. It could be concluded that supine bridge and unilateral bridge can cause more fatigue on erector spina muscle, prone bridge caused Gastrocnemius muscle much fatigue and there were statistical significant differences （P〈0.05） between prone bridge and other five rehabilitation exercises in the degree of rectus abdominis muscle fatigue. There were no statistical significant differences （P〉0.05） between all the left and right sides of the same-named muscles in the median frequency slope during all the exercises of the six core stability trainings, i.e. the degree which the various kinds of rehabilitation exercises effected the left and right side of the same-named muscle had no statistical significant difference （P〉O.05）. In this research, the conclusion presents quantized guidelines on the effects of core stability trainings on different muscles.