BACKGROUND: Because of easy to cause injury and high cost, the biopsy technique and electromyography image analysis are unsuitable for muscle fiber type determination, respectively.
OBJECTIVE: To establish a simple method to calculate the composition percentage of human slow muscle fiber types.
METHODS: Totally 180 male students from College of Physical Education, Yichun University were enrolled as subjects. The test subjects underwent electromyography test and some related indicators examination. All the data were regressively analyzed for statistical analysis. The results were spread and verified in students from the College of Physical Education, Guangxi Normal University at the same age.
RESULTS AND CONCLUSION: The time for static isometric knee extension, the number of push-ups, 1 500 m run time, and the absolute value of maximal oxygen uptake were closely correlated with electromyography indicators and slow muscle fibers composition. Then, a simple ternary regression equation of composition percentage of slow muscle fibers was calculated using regression analysis and curve analysis male students majored in physical education. The verification of this equation was satisfactory in the male students from the College of Physical Education, Guangxi Normal University at the same age. These findings indicate that this equation can be used to calculate the composition percentage of slow muscle fibers.