ABSTRACT

　This study mainly aimed to elucidate whether differences in training intensity affect increase in maximal inspiratory mouth pressure （PImax） after 6 weeks inspiratory muscle resistive training. Twenty-four collegiate swimmers were divided into a control group （n=8）， a 50% training group （n=8）， and a 75% training group （n=8）．Two training groups performed maximal inspiration exercise at load resistance of 50% and 75% of individual PImax, respectively. This exercise was performed 30 times per session, 2 sessions per day, 6 days per week for 6 weeks. Before and after the intervention, PImax and time trial of 50 m free-style swimming were measured.PImax were significantly increased in all groups, and relative changes in PImax were not different among groups. 50 m free-style performance was not changed before and after 6 weeks in all groups. These results demonstrated that training intensity did not influeence on the magnitude of increased PImax after inspiratory muscle resistive training and increase in PImax did not affect swimming performance in sub-elite swimmers.

DECENTE SPORTS SCIENCE Vol.41/The DESCENTE AND ISHIMOTO MEMORIAL FOUNDATION FOR THE PROMOTION SPORTS SCIENCE