抄録
Physical activity and regular exercise are known to have beneficial effects on mood state. Similarly, a single bout of exercise seems to improve mood states. Recent studies suggest that electrical muscle stimulation（EMS）has the potential to be an alternative method of exercise. However, the effects of EMS on mood states are unclear. The purpose of this study was to test if the effects of EMS on mood states are comparable to voluntary exercise. Twenty-one participants were recruited in the present study. The participants answered three kinds of questionnaires before and after the EMS or voluntary exercise for 20 min. The order of EMS and exercise was randomized. We performed two-way analysis of variance（AVOVA）with time（pre vs. post）and condition（EMS vs. voluntary exercise）as within factors. Two-way ANOVA showed a significant main effect of time on pleasantness. The present results suggest that physiological and psychological responses to the EMS as well as voluntary exercise have the potential to affect pleasantness.
