Changing underclothes is an activity that everyone performs every day and there is a lack of objective information derived from observations of people performing this activity. Therefore, a physical therapist must rely on his or her own experience while guiding a person who is changing their underclothes. However, the physical therapist should observe and understand the movements involved. In this study we examined the activity of the abdominal muscle group in healthy persons during a change of underclothes. Observations on the angle of inclination of the pelvis in the long-sitting and chair-sitting positions were made. Integrated electromyographic values of the abdominal muscle group tended to decrease with increasing inclination angle of the pelvis. Our results suggest that the angle of the pelvis during a change of underclothes affects the activity of the abdominal muscle group.
