ABSTRACT

　For this study, we used a competition wheelchair that can drive straight ahead with one arm and a badminton competition wheelchair, taking surface electromyogram（sEMG） data during forward and backward driving: the primary movement of wheelchair badminton. Research participants in the experiment were ten healthy men （22.2 ± 0.4 yr age; 173.7 ± 1.4 cm height; 64.5 ± 2.4 kg weight）. The sEMG measurement locations were the flexor digitorum profundus, biceps brachii, triceps brachii, deltoid, and pectoralis major. Muscle activity was evaluated using integrated electromyograms （iEMGs） obtained from the collected sEMG data. Theexperimentally obtained results showed that straight-line driving by one-arm increased muscle activity in all muscle regions during both forward and backward motion. Non-parametric multiple comparisons by muscle site were found to have significant differences（p<0.05） in the flexor digitorum profundus, biceps brachii, triceps brachii, and pectoralis major muscles forward driving. During backward driving, significant differences （p<0.05） were observed in the flexor digitorum profundus, triceps brachii, and deltoid muscles. In conclusion, results show that the flexor digitorum profundus and triceps brachii play important role in the maintenance and repetition of propulsive force during one-handed chairwork（wheelchair control techniques）, which is unique to badminton.

DECENTE SPORTS SCIENCE Vol.44/The DESCENTE AND ISHIMOTO MEMORIAL FOUNDATION FOR THE PROMOTION SPORTS SCIENCE