O'Connor P J, Crowley M A, Gardner A W, Skinner J S
Exercise and Sport Research Institute, Arizona State University, Tempe 85287-0404.
Eur J Appl Physiol Occup Physiol. 1993;67(1):39-42. doi: 10.1007/BF00377702.
The purpose of this investigation was to examine the influence of daytime exercise on heart rate during sleep. Nine, untrained male college students volunteered to participate. They cycled at 75% maximum oxygen uptake, (VO2max) 30 min.day-1 for 12 weeks. The exercise duration was increased by 5 min every 4 weeks from 30 to 40 min per session. Post-training VO2max [mean (SE): 48.9 (1.7) ml.kg-1.min-1] values were significantly (P < 0.01) higher than pre-training [45.5 (1.8) ml.kg-1.min-1] values. Before and after training, sleeping heart rate was assessed on two separate nights. Data were obtained during a night following 30 min of daytime cycling at 75 (6) % VO2max and on a night in which no daytime exercise was performed. A three-way repeated measures ANOVA [training status (pre-/post-training) x activity (exercise day/nonexercise day) x sleep time (18 epochs of 20 min each)] revealed a significant main effect for sleep time (P < 0.001) as well as a sleep time x training status interaction (P < 0.02). No significant difference in sleeping heart rate was noted when exercise and non-exercise days were compared both before and after training. It is concluded that endurance training in these young adult men: (1) hastens the achievement of baseline heart rate during sleep, and (2) does not moderate the relationship between an acute bout of daytime exercise and sleeping heart rate.
本研究的目的是探讨白天运动对睡眠期间心率的影响。九名未经训练的男性大学生自愿参与。他们以最大摄氧量（VO2max）的75%进行骑行，每天30分钟，持续12周。每4周将运动时长从每次30分钟增加5分钟，直至每次40分钟。训练后的VO2max[平均值（标准误）：48.9（1.7）ml·kg-1·min-1]值显著高于训练前[45.5（1.8）ml·kg-1·min-1]（P<0.01）。在训练前后，分别在两个不同的夜晚评估睡眠心率。数据采集于白天以VO2max的75%（6%）进行30分钟骑行后的夜晚，以及未进行白天运动的夜晚。一项三因素重复测量方差分析[训练状态（训练前/训练后）×活动（运动日/非运动日）×睡眠时间（20分钟的18个时段）]显示，睡眠时间有显著主效应（P<0.001），以及睡眠时间×训练状态交互作用（P<0.02）。在训练前后，比较运动日和非运动日时，睡眠心率均未发现显著差异。研究得出结论，这些年轻成年男性进行耐力训练：（1）能加快睡眠期间达到基线心率的速度，（2）不会调节白天一次急性运动与睡眠心率之间的关系。
