Michio Wachi is Graduate Student in Faculty of Sport and Health Science of Ritsumeikan University, and his research manuscript was accepted and published in The Journal of Physical Therapy Science, which collaborated with Professor Tadao Isaka and Assistant Professor Tadashi Suga. The study revealed that trunk muscle thicknesses measured by ultrasonography were highly correlated with these muscle cross-sectional areas measured by magnetic resonance imaging in baseball players. These results suggest that ultrasonography-measured thicknesses of trunk muscles can be used as a surrogate marker for magnetic resonance imaging-measured muscle size, in athletes who have larger trunk muscles than that of untrained subjects.

Wachi M, Suga T, Higuchi T, Misaki J, Tsuchikane R, Tanaka D, Miyake Y, Kanazawa N, Isaka T. (2017). Applicability of ultrasonography for evaluating trunk muscles size in athletes; a study focused on baseball batters. J Phys Ther Sci, 29: 1534–1538.