2018 Volume 33 Issue 5 Pages 779-782
[Purpose] The purpose of this study was to evaluate a method assessing muscle fiber type using frequency analysis of surface electromyograms of the gastrocnemius muscle. [Participants and Methods] Twenty-four healthy adults participated in this study. Voluntary contraction (VC) and maximum voluntary contraction (MVC) of the gastrocnemius muscle were measured using surface electromyograms, and analyzed using power spectrum analysis in the 0 to 260 Hz frequency range. The results were compared with the muscle fiber composition of the gastrocnemius muscle. [Results] No significant difference in frequency distribution between VC and MVC was found. The fiber composition of the gastrocnemius muscle obtained by frequency analysis was Type I, 47.12%, and Type II, 52.87%. [Conclusion] The frequency analysis method of this study showed that the gastrocnemius muscle has a constant frequency pattern regardless of the contraction strength.
