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exercise
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jogging
proteins
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human aging
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human aging
proteins
How inactivity affects the human body
How physical activity can slow Alzheimer disease
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Key People

Richard Simmons
Richard Simmons
American aerobics instructor and fitness guru
Jack LaLanne
Jack LaLanne
American television personality

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Assorted sports balls including a basketball, football, soccer ball, tennis ball, baseball and others.
American Sports Nicknames