Ahmadizad Sajad, El-Sayed Mahmoud S
Faculty of Science, School of Sport and Exercise Sciences, Liverpool John Moores University, Liverpool, UK.
J Sports Sci. 2005 Mar;23(3):243-9. doi: 10.1080/02640410410001730151.
The aim of this study was to examine short-term changes in blood rheological variables after a single bout of resistance exercise. Twenty-one healthy males completed three sets of 5 - 7 repetitions of six exercises at an intensity corresponding to 80% of one-repetition maximum (1-RM). The average duration of the exercise bout was 35 min. Venous blood samples were obtained before exercise, immediately after exercise and after 30 min of recovery and analysed for lactate, red blood cell count, haematocrit, haemoglobin, plasma viscosity, fibrinogen, total protein and albumin concentration. Plasma volume decreased 10.1% following resistance exercise. This occurred in parallel with an increase of 5.6%, 5.4% and 6.2% in red blood cell count, haemoglobin and haematocrit; respectively. Plasma viscosity increased from 1.55 +/- 0.01 to 1.64 +/- 0.01 mPa s immediately after resistance exercise before decreasing to 1.57 +/- 0.01 mPa s at the end of the recovery period. Similarly, fibrinogen, albumin and total protein increased significantly following resistance exercise. However, the rises in all these rheological parameters were transient and returned to pre-exercise values by the end of recovery. We conclude that a single session of heavy resistance exercise performed by normal healthy individuals alters blood rheological variables and that these changes are transient and could be attributed to exercise-induced haemoconcentration.
本研究的目的是检测单次抗阻运动后血液流变学变量的短期变化。21名健康男性以相当于一次重复最大值（1-RM）80%的强度完成了6项练习，每组5 - 7次重复，共3组。运动 bout 的平均持续时间为35分钟。在运动前、运动后即刻以及恢复30分钟后采集静脉血样，分析乳酸、红细胞计数、血细胞比容、血红蛋白、血浆粘度、纤维蛋白原、总蛋白和白蛋白浓度。抗阻运动后血浆量减少了10.1%。这与红细胞计数、血红蛋白和血细胞比容分别增加5.6%、5.4%和6.2%同时发生。抗阻运动后即刻血浆粘度从1.55±0.01增加到1.64±0.01 mPa·s，在恢复期结束时降至1.57±0.01 mPa·s。同样，抗阻运动后纤维蛋白原、白蛋白和总蛋白显著增加。然而，所有这些流变学参数的升高都是短暂的，在恢复期结束时恢复到运动前的值。我们得出结论，正常健康个体进行单次高强度抗阻运动会改变血液流变学变量，且这些变化是短暂的，可能归因于运动引起的血液浓缩。
