筋音図法による随意筋収縮時の運動単位活動様式の性差の検討

概要

論文の詳細を見る
The aim of the present study was to elucidate gender differences of muscle contractile properties using the mechanomyogram (MMG) and electromyogram (EMG) during voluntary isometric ramp contractions of biceps brachii muscles. Gender difference between 10 young females (age: 21.2±1.0 years) and young males (23.6±2.0) in the root mean squared amplitude of the MMG (RMS_<MMG>) was maintained even when values were expressed relative to muscle cross-sectional area (CSA), however there was no significant gender difference in the RMS_<EMG>/CSA. The RMS_<MMG> increased with force development up to 69% MVC, then decreased in both groups, although changes were smaller in the female group than in the male group. These findings suggest that these gender differences in the MMG/force relationship during ramp contraction are not only due to the effect of the subcutaneous tissues, but also the difference of MU activation strategy.
名古屋市立大学の論文
2003-11-30