Kester, a member of the football team, at one point slipped in mud during practice and twisted his knee, so for some time, he was unable to run. "Of course, just because I couldn't run didn't mean I couldn't stay in shape," he wrote. "So during practice Coach Mac forced me to perform endless army-crawls around the field, dragging my body along the ground using nothing but my forearms and elbows. He would tail me every inch of the way."

A 1968 Harvard University football game against Yale University
AP