Gerontology: Good News for Joggers

Joggers — like religious fanatics —must be endowed with an abundance of faith. They assume that physical exercise is good for them, but there has been relatively little scientific evidence to back them up. Now Herbert A. deVries, a University of Southern California physical-education professor, has conducted controlled before-and-after tests and has found, he contends, that exercise makes the bodies of septuagenarians act like those of 40-year-olds.

Gathering 41 far from athletic oldsters ranging in age from 50 to 87, deVries gave them complete physical examinations, tested reactions, then put them through hour-long workouts three times a week. Puffing...

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