Effects of Sports on Tibialis Anterior Muscle Fiber Type and Exercise Endplate in Mice

  • Bin Zhuang
Keywords: Sports Research, Tibialis Anterior, Muscle Fiber Type, Moving Endplate

Abstract

The proportion of red and white muscle fibers in human muscles is affected by genetic factors. Some
people have a large proportion of white muscle fibers, while others have a large proportion of red muscle fibers.
The purpose of this paper is to study the effect of sports on the tibialis anterior muscle fiber type and motor
endplate of mice. The types and functions of muscle fibers were briefly introduced through literature research
and investigation, and the distribution and mechanism of motor endplates were analyzed. The effects of
endurance exercise and explosive force exercise on muscle fibers and motor endplates were compared through
comparative experiments. The results showed that endurance training did not increase the proportion of red
muscle fibers, but decreased the proportion of red muscle fibers. However, the proportion of intermediate
muscle fibers increased significantly, from 26.5% to 34.4% by 7.9%. The explosive force training obviously
increased the proportion of white muscle fibers. The size of the white muscle fibers increased significantly.
Under explosive exercise, the white muscle fibers increased by 18.6μm, while the size of the red muscle fibers
did not change significantly. According to the experimental results, it can be inferred that under endurance
exercise, white muscle fibers will be transformed into intermediate muscle fibers. Under explosive force
movement, the red muscle fibers will be transformed into intermediate muscle fibers. Under both kinds of
exercises, the proportion of exercise end plates on the red muscle fibers increased, while the white muscle fibers
decreased. The prediction of short-term change of muscle fiber type in this paper needs further verification.

Published
2020-03-01