水中歩行中の呼吸循環系に及ぼす水流有無の条件差の影響

概要

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The purpose of this study was to examine the distinction of cardiorespiratory responses between the effects of water with and without flow. Ten healthy, female college students (21 ± 2 yr, 164.3 ± 4.4 cm, 56.3 ± 5.2 kg) volunteered to participate in this study. The subjects walked in water with flow of the same speed as walking (FW) and without flow (W) and exercised stepping at the same pont in water with flow (F) at four different speeds of progressive intensity, each of which was maintained for 4 min (30, 40, 50, 60 m/min). The water was xiphoid level deep and 30℃. The ventilation (VE), oxygen intake (V0_2) and heart rate (HR) were all measured continuously during exercise. Though the parameters of the three types of exercise increased in an exponential curve with increasing speed, respectively, VE, V0_2 and HR at each speed were significantly higher in FW than in W and F (p<0.01). The differences of each parameter between FW and W or F were also remarkable as speed increased. 50〜70 % V0_2max was gained in FW, and only 30 % VO_2max in W and F. These results show that in water walking it is necessary to add flow of the same speed as walking in order to gain enough intensity of exercise to promote aerobic capacity.
久留米大学の論文
1996-09-01