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Effects of time of day on 24‐h post‐exercise blood pressure and mood in normotensive humans
Author(s) -
Sone Ryoko,
Yamazaki Fumio,
Tan Nobusuke
Publication year - 2013
Publication title -
the faseb journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.709
H-Index - 277
eISSN - 1530-6860
pISSN - 0892-6638
DOI - 10.1096/fasebj.27.1_supplement.903.1
Subject(s) - morning , evening , supine position , blood pressure , mood , medicine , sitting , vo2 max , cardiology , endocrinology , heart rate , physical therapy , psychiatry , physics , pathology , astronomy
The duration of blood pressure (BP) lowering after a bout of exercise, i.e. post‐exercise hypotension (PEH), has not been sufficiently observed. The effects of the time of day on the PEH have not been clarified. Moderate exercise that is easy to induce PEH has been reported to improve mood. So, we examined the effect of exercise in the morning and evening on the 24‐h post‐exercise BP and mood. Nine normotensive males performed running at 60% of the maximal oxygen uptake for 30 min from 8:00 (AM) and 16:00 (PM), respectively, and we subsequently measured the BP for 24h. Control experiment without exercise (C) was also conducted. Compared with the C condition, systolic BP in a supine position (SBPsup) was lower in the AM and PM in the daytime (p<0.05), and tended to be lower in the AM, but did not differ in the PM at nighttime. The SBPsup averaged over 24h was ~3 mmHg lower in the AM and PM than under the C condition. A similar observation was also obtained concerning the SBP on sitting in the daytime, and the magnitude of SBP lowering was correlated with the fatigue score of the profile of mood states (p<0.05). Therefore, the post‐exercise BP response at nighttime depends on the time of day, and BP lowering in the daytime may relate to the fatigue sensation.