We determined effect of aerobic exercise in early evening on the quality, quantity, and haemodynamic response of subsequent nocturnal sleep in the home. Ten healthy young participants performed two protocols, with/without cycle ergometer exercise (60 min at 50% heart rate reserve) in early evening. Blood pressure (BP) (Holter) and physical activity (accelerometer) were measured from late afternoon of day 1 until noon of next day (day 2). Additionally, at bedtime participants were equipped with a small device worn on the wrist that identified sleep stage. There were no substantial differences in objective indices of sleep between two protocols (total sleep time: 438 ± 76 vs. 457 ± 64 min; P > 0.10). BP during nocturnal sleep tended to be lowered by prior exercise (MAP: 71 ± 5 vs. 68 ± 6 mmHg; P = 0.08). Aerobic exercise in early evening apparently has no acute effect on sleep per se, but seems to have a residual effect on haemodynamics, i.e. prolongation of post-exercise hypotension.

No abstract

It is not well established as to whether the nocturnal sleep would be affected by the preceding exercise in daytime. While the exercise is known to elicit acutely a reduction in blood pressure (BP) for approximately 2–3 hours (i.e. post‐exercise hypotension: PEH) even in healthy subjects, it is still unclear as to whether the PEH would be lasting for more duration. We, therefore, determined the effect of aerobic exercise in early evening on the quality/quantity of sleep and its hemodynamic response in the following night. Ten healthy young male subjects (age: 18–25 yr) participated in two protocols either with or without cycle ergometer exercise (60 min at 50% HR reserve) in early evening. The ambulatory monitoring of BP/HR and physical activity by accelerometer were performed from the late afternoon (i.e. 30 min before exercise) to the noon of next day. In addition, the watch‐typed device for identifying the stage of sleep based on the heart rate variability analysis was equipped during the bedtime. There were no substantial differences in the sleep indices between with and without a preceding exercise. The mean value of BP during nocturnal sleep showed a tendency to be lowered by the preceding exercise. The aerobic exercise in early evening has no acute effect to the sleep itself, but some residual effect to the hemodynamic response during sleep, i.e. the prolonged PEH. Supported by JSPS‐KAKENHI (21370111 to YF, 21500689 to AM)