Key result
Moderate endurance exercise lowers 24-hour supine SBP by ~3 mmHg in young normotensive men.
Why the study?
The study aimed to examine blood pressure responses in sitting and supine positions for 24 hours following moderate endurance exercise performed in the morning versus afternoon.
Does moderate endurance exercise in the morning or afternoon reduce 24-h post-exercise blood pressure in young normotensive men?
RCT (n=9)
Open-label
Randomized crossover
No
Does moderate endurance exercise in the morning or afternoon reduce 24-h post-exercise blood pressure in young normotensive men?
Effect estimate: decrease of 2-3 mmHg
p-value: p=<0.05
A 30-minute bout of moderate endurance exercise in either the morning or afternoon modestly lowers 24-hour supine systolic blood pressure in young normotensive men.
Modest BP lowering in normotensives warrants no practice change; leaves open timing effects in hypertension.
This study aimed to examine blood pressure (BP) response in sitting (daytime only) and supine positions for 24 h after moderate endurance exercise in the morning and afternoon in healthy and normotensive young men. Nine men with a moderate fitness level ran at 68%-69% maximal oxygen uptake for 30 min at 8:00 AM and 4:00 PM. Arterial BP was measured hourly for 24 h after each exercise and each control experiment. The positions during the measurement were supine during nighttime, and supine and sitting during daytime (7:00 AM-11:00 PM). The Profile of Mood States (POMS) test was performed before the sitting measurement. Post-exercise systolic BP (SBP) in the supine position decreased by 2-3 mmHg on average for 24 h in both exercise conditions compared to the control condition (p < 0.05). In both exercise conditions, the post-exercise SBP decrease tended to be smaller in the sitting than in the supine position, and a greater SBP decrease in the sitting position tended to relate linearly with a greater fatigue score increase. We conclude that, in young normotensive men, a bout of moderate endurance exercise both in the morning and afternoon decreases SBP in the supine position by a few mmHg on average over 24 h. In addition, post-exercise BP response during daytime appeared to vary with posture and relate to fatigue sensation.
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Sone et al. (2019) conducted an RCT in Healthy (Normotensive) (n=9). Moderate endurance exercise vs. Resting control was evaluated on 24-hour post-exercise systolic blood pressure (SBP) in the supine position (decrease of 2-3 mmHg, p=<0.05). Moderate endurance exercise in the morning or afternoon decreased 24-hour systolic blood pressure in the supine position by 2-3 mmHg on average in young normotensive men.
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