Allen T E, Smith D P, Miller D K
Med Sci Sports. 1977 Fall;9(3):159-63.
Cardiac output (Q), heart rate (HR), stoke volume (SV), and arteriovenous oxygen difference (AVD) were measured in 16 high school wrestlers during submaximal work (65%Vo2 Max) at normal weight (T1), after a four or five percent weight loss (T2), and following one hour of rehydration (T3). Weight losses were accomplished over 48 hours by fluid and food restriction as well as intermittent exercise. An ad libitum volume and commercial glucose-electrolyte solution was used to rehydrate the subjects. At T2 the mean weight loss was 4.6%, with the average plasma deficit estimated to be 4.9%. Under these conditions significantly higher HR and lower SV were observed during standardized exercise. Although Q was 7.8% lower and AVD was 7.3% higher after dehydration, neither change was statistically significant. Following rehydration all dependent variables returned to near T1 levels. It was concluded that despite a short rehydration period, the cardiovascular dynamics of these high school wrestlers rapidly returned to normal during moderately heavy work because of the small plasma changes that accompanied the 48-hour weight loss.
在16名高中摔跤运动员处于正常体重（T1）、体重减轻4%或5%后（T2）以及补液1小时后（T3），于次最大运动量（65%最大摄氧量）时测量心输出量（Q）、心率（HR）、每搏输出量（SV）和动静脉氧差（AVD）。通过限制液体和食物摄入以及间歇性运动，在48小时内实现体重减轻。使用随意量的市售葡萄糖电解质溶液对受试者进行补液。在T2时，平均体重减轻4.6%，估计平均血浆缺失为4.9%。在这些条件下，标准化运动期间观察到心率显著升高，每搏输出量降低。尽管脱水后心输出量降低7.8%，动静脉氧差升高7.3%，但两者变化均无统计学意义。补液后，所有相关变量均恢复至接近T1水平。得出的结论是，尽管补液期较短，但由于48小时体重减轻伴随的血浆变化较小，这些高中摔跤运动员在中等强度工作期间心血管动力学迅速恢复正常。
