New frontiers in geriatric science: fitness in the "Third Age".
D000293:Adolescent; D000328:Adult; D000368:Aged; D000375:Aging; D002170:Canada; D005260:Female; D005853:Geriatrics; D006306:Health Surveys; D006801:Humans; D008297:Male; D008875:Middle Aged; D005082:Physical Exertion; D010809:Physical Fitness; D011634:Public Health; D011788:Quality of Life