Study of the exercise prescription and evaluation method using a hand-ergo meter during standing in water

众所周知，在水中浸泡期间，静水压会引起心动过缓和每搏输出量增加。我们阐明下腔静脉的横截面积随着水深的增加而显著增加。摘要本研究旨在探讨运动处方及以手部测力计评估水中运动之方法。我们有受试者的知情同意书。他们以志愿者身份参加本研究。浸水组心率明显低于离水组。这一结果表明，水浸增加了静脉回流。在阻塞结束30秒后，心率显著增加。此后，心率降至静息水平。阻断结束后下腔静脉截面积明显减小。然而，下腔静脉横截面积的减少在前进约20秒时达到底部，而不是离开水。结果提示，心率和下腔静脉截面积的增减与静脉回流量有关，心率和下腔静脉截面积的波动与静脉回流速度有关。lb总结：（1）下腔静脉横截面积的变化是评价水中运动处方的适宜指标。（2）静脉回流对下腔静脉截面积有影响。(3)It可以估计，在水中站立期间，静脉回流的速度约为20秒。(4)A在40℃水中用足浴器进行手-力计运动时，放松效应加速。

It is well known bradycadia and increase in stroke volume occur induced by hydrostatic pressure during water immersion. We clarified the cross sectional area of inferior vena cava significantly increased according with increasing water depth. The purpose of this study was to clear the exercise prescription and evaluation method using a hand-ergo meter during water immersion. We have informed consent for subjects. They were participated in this study for volunteer. Heart rate of in water immersion was significantly lower than out of water. This result suggests the water immersion increases the venous return. Heart rate significantly increased after thirty seconds at the end of the occlusion. Thereafter, heart rate was reduced to rest level. The cross sectional area of inferior vena cava significantly decreased after the end of the occlusion. However, the decrease of cross sectional area of inferior vena cava reached the bottom at about twenty seconds forward rather than out of water. These results suggest that increase and decrease of heart rate and cross sectional area of inferior vena cava are dependent in the volume of venous return and that the fluctuation of velocity of heart rate and cross sectional area of inferior vena cava is dependent in the velocity of venous return. lb summarize : (1)Changes of the cross sectional area of inferior versa cava is the appropriate evaluation method as a index of exercise prescription of water exercise. (2)The venous return does affect the cross sectional area of inferior vena cava. (3)It can be estimated the velocity of venous return was about twenty seconds during standing in the water. (4)A effect of relaxation is accelerated during exercise of hand-ergo meter using a foot-bath in water of 40℃.