title: Sit-ups, other exercises may injure older patients with osteoporosis.
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D015444:Exercise; D015775:Fractures, Stress / Q000209:etiology*; D006801:Humans; D010024:Osteoporosis / Q000150:complications / Q000517:prevention & control / Q000534:rehabilitation