title: Encouraging physical fitness for older people.
authors.forename: W M
authors.initials: WM
authors.lastname: Bortz
mesh_terms: 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