The fact that he had to do push-ups on his knees was almost humiliating.

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Mr. White also suggests using commercial breaks to do push-ups, sit-ups, or burpees (also known as thrust squats).

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Michigan State star Draymond Green said he once had to do push-ups as punishment for wearing Michigan-style black socks.

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Mr. White points to Herschel Walker, the former Dallas Cowboys running back, who was known to do more than 1, 000 push-ups and sit-ups by the end of every day.

WSJ: Before Outer Space, He Conquers Continents