Encouraging physical fitness for older people.
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D000368:Aged / Q000523:psychology / Q000706:statistics & numerical data; D005081:Exercise Therapy / Q000379:methods*; D005582:Foundations; D006293:Health Promotion / Q000379:methods*; D006801:Humans; D006278:Medicare / Q000458:organization & administration; D009042:Motivation; D009426:Netherlands; D010809:Physical Fitness / Q000523:psychology; D014481:United States