KIHU-Research Institute for Olympic Sports, Physiology, Jyväskylä, Finland.
Int J Sports Med. 2010 Mar;31(3):154-9. doi: 10.1055/s-0029-1243221. Epub 2009 Dec 17.
The effects of endurance training on endurance performance characteristics and cardiac autonomic modulation during night sleep were investigated. Twenty-four sedentary subjects trained over four weeks two hours per week at an average running intensity of 76+/-4% of their heart rate reserve. The R to R ECG-intervals were recorded and heart rate variability indices including high frequency power (HFP) were calculated for the nights following the training days every week. The subjects were divided into responders and non-responders according to the improvements in the maximal velocity of the incremental treadmill test (v(max)). The responders improved their v(max) by 10.9+/-46 % (p < 0.001) while no changes were observed in the non-responders (1.6+/-3.0%), although there were no differences in any training load variables between the groups. In the responders nocturnal HFP was significantly higher during the fourth training week compared to the first training week (p=0.036). Furthermore, a significant correlation was observed between the change in v(max) and the change in nocturnal HFP (r=0.482, p=0.042). It was concluded that after similar training, an increase in cardiac vagal modulation was related to improved v(max) in the sedentary subjects.
研究了耐力训练对夜间睡眠时耐力表现特征和心脏自主神经调节的影响。24 名久坐的受试者在四周内每周训练两次，每次两小时，平均跑步强度为其心率储备的 76+/-4%。记录了 R 到 R 的心电图间隔，并计算了心率变异性指数，包括高频功率（HFP），每周在训练日后的晚上进行。根据递增跑步机测试的最大速度（v(max)）的改善情况，将受试者分为反应者和非反应者。反应者的 v(max)提高了 10.9+/-46%（p<0.001），而非反应者则没有变化（1.6+/-3.0%），尽管两组之间的任何训练负荷变量都没有差异。在反应者中，第四训练周的夜间 HFP 明显高于第一训练周（p=0.036）。此外，还观察到 v(max)的变化与夜间 HFP 的变化之间存在显著相关性（r=0.482，p=0.042）。结论是，在进行类似的训练后，心脏迷走神经调节的增加与久坐受试者 v(max)的提高有关。
