2023 Volume 23 Pages 44-50
In this study, we investigated the muscle activity that causes spinal and pelvic movements and changes inspinal and pelvic alignment when performing forward reaching in the sitting position at 0.5 seconds, which issimilar to the speed of the flexion phase of standing up movements. We measured the muscle activities of thelongissimus, multifidus and ilicostalis muscles, and the angular changes of the spinal column and hip joint of20 healthy men performing anterior reach motion in the sitting position. The results show that the activity ofall muscles weakened at the time of 20% from the start of movement and tended to increase significantly after40%. In addition, the angle change of the spinal column and hip joint showed flexion of the lower thoracicspine from the time of 20% to 40%, and after 40%, the anterior reach distance increased significantly as theflexion angle of the hip joint increased. The results of this study show that there is a difference in the purposeof exercise between the phase up to 40% of the time from the movement start and the phase that follows.
