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Exercise Performed at Different Times of the Day Has Different Effects on Ambulatory Blood Pressure, Heart Rate and Arterial Stiffness
Author(s) -
Brito Leandro,
Rezende Rafael,
CipollaNeto José,
Forjaz Claudia
Publication year - 2015
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.29.1_supplement.674.2
Subject(s) - morning , evening , medicine , arterial stiffness , heart rate , blood pressure , ambulatory blood pressure , ambulatory , cardiology , diastole , aerobic exercise , physical therapy , physics , astronomy
Objective To analyze ambulatory blood pressure (BP), heart rate and arterial stiffness responses after performing aerobic exercise in the morning and evening. Methods 13 young pre‐hypertensive men underwent four experiments conducted in a random order: two at 9 am and two at 6:30 pm. At each time of day, a control and an exercise session (cycle ergometer 45 min, 50% VO 2 peak) were performed. After the sessions, ambulatory monitoring was performed for 24 hours taken measures each 15 minutes. Ambulatory systolic, diastolic and mean BP, as well as heart rate and arterial stiffness index were calculated for 24h, daytime and nighttime periods. At each time of day, data were compared between control and exercise sessions by a paired T‐test, p蠄0.05. Results After evening exercise, nighttime systolic BP was lower than the control session (116±11 vs. 120±10 mmHg, p=0.04). None of the other variables showed difference after evening exercise. After morning exercise, heart rate was greater than control for all periods (24h 80±7 vs. 76±6 bpm, p=0.02; daytime 83±8 vs. 79±7 bpm, p=0.01; and nighttime 72±8 vs. 67±5 bpm, p=0.05), and arterial stiffness was greater for 24h and daytime (0.298±0.098 vs. 0.233±0.068 U, p=0.01, and 0.432±0.137 vs. 0.322±0.089 U, p=0.02, respectively). None of the other variables showed differences after morning exercise. Conclusion Aerobic exercise performed in the evening decreased nighttime BP while exercise performed in the morning increased heart rate and arterial stiffness. Financial support: CNPq: 472288/2011‐3, FAPESP: 2011/03584‐8.