Normal levels of activity in Canadian city dwellers.
D000293:Adolescent; D000328:Adult; D004562:Electrocardiography; D006801:Humans; D008875:Middle Aged; D008991:Monitoring, Physiologic; D009864:Ontario; D010101:Oxygen Consumption; D005082:Physical Exertion; D010809:Physical Fitness; D011674:Pulse; D012924:Social Conditions; D013637:Tape Recording