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Phil is 60 years old and has been an avid runner for 40 years. Recently, he has had to have both of his knees replaced and swimming is now his main form of exercise. Phil's…

Phil is 60 years old and has been an avid runner for 40 years. Recently, he has had to have both of his knees replaced and swimming is now his main form of exercise. Phil's…
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Phil is 60 years old and has been an avid runner for 40 years. Recently, he has had to have both of his knees replaced and swimming is now his main form of exercise. Phil's case provides support for the _____ theory of aging.

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User Kylemclaren
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Hi !

Phil's case provides support for the "wear-and-tear" theory of aging.

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User Paul McLoughlin
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