Melancon Michel O, Lorrain Dominique, Dionne Isabelle J
Research Center on Aging, Health and Social Services Centre-University Institute of Geriatrics of Sherbrooke, Sherbrooke, QC, Canada; University of Sherbrooke, Faculty of Physical and Sport Education, Department of Kinanthropology, Sherbrooke, QC, Canada.
Research Center on Aging, Health and Social Services Centre-University Institute of Geriatrics of Sherbrooke, Sherbrooke, QC, Canada; University of Sherbrooke, Faculty of Human Sciences, Department of Psychology, Sherbrooke, QC, Canada.
Physiol Behav. 2015 Mar 1;140:203-8. doi: 10.1016/j.physbeh.2014.12.031. Epub 2014 Dec 22.
During later life sleep depth (slow-wave sleep, SWS) and maintenance exhibit deleterious changes, with possible negative effects on daytime function. This study assessed the effect of chronic, supervised exercise on sleep using laboratory-based polysomnography (PSG) and repeated measures in older adults. Thirteen men aged 64±3served as their own controls and had their sleep measured for a total of 6 nights: 3 before and 3 after the 16-week training intervention. Each sequence involved 1 familiarization trial followed by 2 experimental nights (exercise night; nonexercise night) measured using 13-channel PSG (combined electroencephalography, electromyography, and electro-oculography). The exercise challenges consisted of inclined treadmill brisk walking (60min, 68-69% V˙O2peak). The intervention successfully improved some parameters of aerobic fitness, i.e. ventilatory thresholds 1 and 2 (P<0.05). Acute exercise triggered increases in circulating free fatty acids and lactate levels both at baseline and after the intervention (P<0.05). Noteworthy, acute exercise following training resulted in a 71% increase in SWS during subsequent sleep in comparison with the nonexercise condition before training, respectively 2.4% and 1.4% (P<0.05). Following training, acute exercise reduced total wake time by 30% and REM onset latency by 14% (P<0.05). Acute exercise improved sleep continuity by decreasing total wake time. These results show that aerobic training could increase sleep depth and continuity, during active days, in elderly men. In habitual exercisers, these effects of aerobic exercise on sleep, although modest, might counteract those resulting from aging.
在晚年，睡眠深度（慢波睡眠，SWS）及维持睡眠的能力会出现有害变化，可能对日间功能产生负面影响。本研究采用基于实验室的多导睡眠图（PSG）及重复测量法，评估了老年人在长期、有监督的运动对睡眠的影响。13名年龄为64±3岁的男性作为自身对照，共进行了6晚的睡眠测量：在为期16周的训练干预前测量3晚，干预后测量3晚。每个测量序列包括1次熟悉试验，随后是2个实验夜晚（运动夜；非运动夜），使用13通道PSG（结合脑电图、肌电图和眼电图）进行测量。运动挑战包括在倾斜跑步机上轻快步行（60分钟，68 - 69%最大摄氧量峰值）。干预成功改善了一些有氧适能参数，即通气阈值1和2（P<0.05）。急性运动在基线和干预后均引发循环游离脂肪酸和乳酸水平升高（P<0.05）。值得注意的是，与训练前的非运动状态相比，训练后的急性运动使随后睡眠期间的慢波睡眠增加了71%，分别为2.4%和1.4%（P<0.05）。训练后，急性运动使总觉醒时间减少了30%，快速眼动睡眠起始潜伏期缩短了14%（P<0.05）。急性运动通过减少总觉醒时间改善了睡眠连续性。这些结果表明，有氧训练可在活跃日增加老年男性的睡眠深度和连续性。在习惯性锻炼者中，有氧运动对睡眠的这些影响虽然不大，但可能抵消衰老带来的影响。
