Telemetered heart rate responses of middle-aged sedentary males, middle-aged active males and "a" grade male squash players.
D004562:Electrocardiography; D006339:Heart Rate; D006801:Humans; D008297:Male; D008875:Middle Aged; D010806:Physical Education and Training; D005082:Physical Exertion; D010809:Physical Fitness; D013178:Sports Medicine; D013686:Telemetry; D013997:Time Factors