[手部测力计进行节律性工作时的肌肉活动与心率。I. 心率、肌肉生物电活动及与收缩强度相关的力学图]

[Muscle activity and heart rate during rhythmical work on the hand ergometer. I. Heart rate, bioelectric muscle activity and mechanogram relative to the strength of contraction].

作者信息

Kobryn U, Hoffmann B, Bräuer D, Bastek R, Küchler G, Minuth B

出版信息

Acta Biol Med Ger. 1977;36(9):1253-62.

Abstract

The experiments were carried out on 11 subjects ranging in the age from 23 to 37 years. Heart rate, integrated electrical activity from 4 muscles of the forearm and the hand and mechanical activity were measured simultaneously during rhythmical work using a hand-ergometer. The strength of the dynamic contractions was 20, 40, 60, 80 and 100% of a maximal voluntary contraction. The mean values of the maximal voluntary contraction obtained on male subjects were 57.3 kp and on female subjects 33.2 kp. The results showed that during dynamic contractions mechanical activity was related to the integrated electrical activity and both integrated electrial activity of 3 muscles and heart rate were linearly related to the load. The correlation coefficients for the EMG/EMG relationships of different muscles and for the EMG/heart rate varied between 0.83 and 0.98.

摘要

实验在11名年龄在23至37岁之间的受试者身上进行。使用手摇测力计在有节奏的工作过程中同时测量心率、前臂和手部4块肌肉的综合电活动以及机械活动。动态收缩强度为最大自主收缩的20%、40%、60%、80%和100%。男性受试者最大自主收缩的平均值为57.3kp，女性受试者为33.2kp。结果表明，在动态收缩过程中，机械活动与综合电活动相关，并且3块肌肉的综合电活动和心率均与负荷呈线性相关。不同肌肉的肌电图/肌电图关系以及肌电图/心率的相关系数在0.83至0.98之间变化。