Petrofsky J S, Lind A R
Eur J Appl Physiol Occup Physiol. 1980;44(2):189-200. doi: 10.1007/BF00421098.
The influence of temperature on the amplitude and frequency components of the EMG power spectra of the surface EMG recorded over the forearm muscles was examined in five male and five female subjects during brief and fatiguing isometric contractions of their handgrip muscles. Brief (3 s) isometric contractions were exerted at tensions ranging between 10 and 100% of each subject's maximum strength while fatiguing contractions were exerted at tensions of 25, 40, and 70% of their maximum strength. The temperature of the muscles during those contractions was varied by placing the forearms of the subjects in a controlled temperature water bath at temperatures of 10, 20, 30, and 40 degrees C. The results of these experiments showed that the center frequency of the power spectra of the surface EMG was directly related to the temperature of the exercising muscles during brief isometric contractions. During fatiguing isometric contractions, the amplitude of the EMG increased while the center frequency of the EMG power spectra decreased for all tensions examined.
在五名男性和五名女性受试者进行短暂和疲劳性握力肌肉等长收缩期间，研究了温度对在前臂肌肉上记录的表面肌电图（EMG）功率谱的幅度和频率成分的影响。短暂（3秒）等长收缩在每个受试者最大力量的10%至100%之间的张力下进行，而疲劳性收缩在其最大力量的25%、40%和70%的张力下进行。在这些收缩过程中，通过将受试者的前臂置于温度为10、20、30和40摄氏度的可控温度水浴中，改变肌肉的温度。这些实验结果表明，在短暂等长收缩期间，表面肌电图功率谱的中心频率与运动肌肉的温度直接相关。在疲劳性等长收缩期间，对于所有测试的张力，肌电图的幅度增加，而肌电图功率谱的中心频率降低。
