Abstract
[Purpose] To obtain basic data for rehabilitation to help patients return to sports activities or with other goals by examining changes in the side-stepping movement velocity, representing trunk muscle activity. [Subjects and Methods] Twenty healthy adult males executed side-stepping movements at 5 different velocities to measure the activities of the following muscles during the movements using surface electromyography: the rectus abdominis, ex- and internal oblique, and lumbar multifidus muscles. [Results] With increases in the side-stepping movement velocity, the activities of all muscles were promoted. [Conclusion] The trunk muscle activity level increased when executing side-stepping movements at a higher velocity, suggesting that the muscles of the trunk are involved in such performance.
