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KMID : 1139220190150040566
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Journal of Exercise Rehabilitation
2019 Volume.15 No. 4 p.566 ~ p.570
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Comparison of respiratory muscle strength in individuals performing continuous and noncontinuous walking exercises in water after the 6-week program
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Yamashina Yoshihiro
Aoyama Hiroki
Hori Hirofumi
Morita Emiko
Sakagami Nami
Hirayama Tomoko
Yamato Yosuke
Honda Hiroto
Terada Shigeru
Goto Masahiro
Tabira Kazuki
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Abstract
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This study aimed to compare respiratory muscle strength in individuals performing continuous and noncontinuous walking exercises in water after the 6-week program. Twenty-nine healthy men were randomly divided into a continuous group (CG, n= 14) and a noncontinuous group (NG, n= 15). Firstly, both groups executed the 6-week program which set them to walk for 30 min, 4 times per week, over 6 weeks in a pool with the adjusted intensity that their walking speed increased the heart rate to 60% of the predicted maximum. After the 6-week program, participants in the CG continued the water-walking program for 4 weeks while those in the NG discontinued the water-walking program. In both groups, respiratory muscle strength evaluated by maximum inspiratory pressure (PImax) and maximum expiratory pressure (PEmax) increased significantly after the 6-week program compared with pre-exercise value. Compared to the value after the 6-week program, PEmax increased significantly in the CG after 10 weeks (P< 0.05), but the PImax showed no significant change. Compared to the value after the 6-week program, after 10 weeks, in the NG, PEmax decreased significantly, with a considerable decrease after 9 and 10 weeks compared to the CG (P< 0.05). The PImax in the NG significantly decreased after 10 weeks from the value observed after the 6-week program. We demonstrated that 6 weeks of walking in water at 60% of the predicted maximum heart rate enhances PImax and PEmax, and that PImax and PEmax decrease in 4 weeks without a water-walking program.
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KEYWORD
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Walking in water, Respiratory muscle strength, Healthy males
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