周波数成分からみた示指伸筋の疲労について

概要

論文の詳細を見る
A study was conducted to investigate muscle fatigue during isometric contraction of the indicis proprius using EMG analysis (BIMUTAS Ver. 2.1).The subjects were 8 healthy men (ranging in age from 19 to 42 years). Plummetslets (ranging from 300g to 600g) were placed on the distal knuckle of the index finger to create loads on the indicis proprius muscle. EMG was recorded until the plummet dropped the total time required was divided into 10 equal parts. In each part, the EMG recort for1he first 1000 ms was picked out. Then the mean power frequency (MdPF) and median power frequency (MdPF) of the power spectrum were calculated. The results were as follows : 1) Both MePF and MdPF showed shits to lower frequency bands. 2) Integrated values of the EMG power spectrum increased with time. 3) The time courses of the MdPF and MdPF in each EMG sample for the 8 subjects were determined by the 3-point moving avenge method. A break-point was observed in each MePF and MdPF diagram. It was considered that two-break points observed in the time courses of the EMG record were valid as an objective index of local muscle fatigue.
日本体力医学会の論文
1992-02-01