Heart rate in caged Macaca fascicularis. Effects of short-term physical exercise.
Electrocardiograms were recorded hourly for five days in 16 caged Macaca fascicularis by means of a miniaturized ECG transmitter connected to two chest leads. The lowest heart rates were 135 +/- 35 (mean +/- SD, n= 31) beats/min at 5 a.m., and the highest were 192 +/- 22 (n = 29) beats/min at 3 p.m. Sinus arrhythmia was common. Eight of the animals were trained to exercise in a specially designed enclosed treadmill; their heart rates were recorded daily during two 10-min periods of running at 3.4 km/h. Transfer of the monkeys (n k0) to the treadmill increased heart rate from 186 +/- 24 to 228 +/- 23 beats/min; exercise further increased it to 271 +/- 8 beats/min.
D000818:Animals; D001146:Arrhythmia, Sinus / Q000209:etiology; D004562:Electrocardiography; D005080:Exercise Test; D005260:Female; D000882:Haplorhini; D006339:Heart Rate; D008251:Macaca / Q000502:physiology*; D008252:Macaca fascicularis / Q000502:physiology*; D005082:Physical Exertion; D012149:Restraint, Physical