Changed in myoproteins follwing long-term with high intensity endurance training in rats

Masanobu Wada, Shigeru Katsuta
1988 Taiikugaku kenkyu (Japan Journal of Physical Education Health and Sport Sciences)  
Effects of long ・ term with high intensity endurance training upon histochemically assessed myofibril 且 ar actomyosin ATPase , myosin composition and creatine kinase content were analyzed in muscles from rats which were trained to run up to 240min/ day at 40m / min . Following 16 weeks of the training , in M 。 soleus , proportions of slow − twitch oxidative ( SO ) fibers and slow type myosin light chains were increased ; no changes in myosin light chain were signi 丘 cantly observed .
more » ... served . Furthermore, a decrease in creatine kinase was found in this muscle , indicating that SO fibers might have acquired slower properties. On the other hand, in M . extensor digitorum longus , there was only a transforma ・ . tion between fast − twitch fiber subgroups , with a d rease in LC3f by which fast myosin constructed was characterized
doi:10.5432/jjpehss.kj00003391542 fatcat:itbnlmjz6zbnllx5enb7ivwu24