Is 20 minutes of exercise the new longevity recipe? This high-powered lawyer thinks so.

Profusek (not pictured) does about four minutes of squats per week on the program.

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• A small study is testing a combination of exercise, supplements, and drugs for longevity.
• The first patient said he feels less stiff since he started the program.
• Researchers suspect the biggest effects come from about 20 minutes of exercise a day.

Robert Profusek likes a routine.

Every weekday, he rises at 4 a.m. That's enough time for the high-powered...