title: Physical activity and the circadian rhythm of blood pressure.
abstract: 1. Ambulatory blood pressure monitoring was carried out in 10 subjects for a period of 48 h, the first or second 24 h part of which was selected randomly to be a period of complete bed rest. 2. Heart rate was significantly lower throughout the period of bed rest except for the period 04.00-08.00 hours, when there was little difference. 3. The circadian variation of blood pressure was reduced during the day of bed rest but this was mainly due to higher night-time pressures.
mesh_terms: D000328:Adult; D001510:Bed Rest; D001794:Blood Pressure; D002940:Circadian Rhythm; D005260:Female; D006339:Heart Rate; D006801:Humans; D006973:Hypertension / Q000503:physiopathology*; D007022:Hypotension / Q000503:physiopathology; D008297:Male; D008875:Middle Aged; D005082:Physical Exertion; D012016:Reference Values