Buchheit M, Laursen P B, Al Haddad H, Ahmaidi S
Faculty of Sport Sciences, Research Laboratory, EA 3300 Laboratory of Exercise Physiology and Rehabilitation, University of Picardie, Jules Verne, Amiens, France.
Eur J Appl Physiol. 2009 Feb;105(3):471-81. doi: 10.1007/s00421-008-0925-1. Epub 2008 Nov 14.
The purpose of this study was to investigate the effect of exercise-induced plasma volume expansion on post-exercise parasympathetic reactivation. Before (D(0)) and 2 days after (D(+2)) a supramaximal exercise session, 11 men (21.4 +/- 2.6 years and BMI = 23.0 +/- 1.4) performed 6-min of submaximal running where heart rate (HR) recovery (HRR) and HR variability (HRV) indices were calculated during the first 10 min of recovery. Relative plasma volume changes (PV) were calculated using changes in hematocrit and hemoglobin measured over consecutive mornings from D(0) to D(+2). Parasympathetic reactivation was evaluated through HRR and vagal-related indexes calculated during a stationary period of recovery. Compared with D(0), PV (+4.8%, P < 0.01) and all vagal-related HRV indices were significantly higher at D(+2) (all P < 0.05). HRR was not different between trials. Changes in HRV indices, but not HRR, were related to PV (all P < 0.01). HRR and HRV indices characterize distinct independent aspects of cardiac parasympathetic function, with HRV indices being more sensitive to changes in plasma volume than HRR.
本研究的目的是调查运动引起的血浆量增加对运动后副交感神经再激活的影响。11名男性（年龄21.4±2.6岁，体重指数BMI=23.0±1.4）在进行一次超最大运动量运动前（第0天）和运动后2天（第+2天）进行了6分钟的次最大强度跑步，在恢复的前10分钟计算心率（HR）恢复（HRR）和心率变异性（HRV）指标。使用从第0天到第+2天连续早晨测量的血细胞比容和血红蛋白变化计算相对血浆量变化（PV）。通过在恢复静止期计算的HRR和迷走神经相关指标评估副交感神经再激活。与第0天相比，第+2天的PV（+4.8%，P<0.01）和所有迷走神经相关的HRV指标均显著更高（均P<0.05）。各试验之间的HRR没有差异。HRV指标的变化而非HRR与PV相关（均P<0.01）。HRR和HRV指标表征了心脏副交感神经功能的不同独立方面，HRV指标比HRR对血浆量变化更敏感。
