Richard Nixon was possibly our least athletic president. About the only exercise he ever got was playing golf, which he took up during his stint as vice-president, reputedly as a way to spend more time with his boss, Dwight Eisenhower. Nixon's swing was awkward and his golf clothes never fit well. He never shot under 100 as vice-president, but was dogged in his efforts to improve. He played quite a bit during his first term as president, less in his second, and more after his forced retirement.
Nixon wasn't a particularly fastidious follower of the rules, but he worked hard and steadily improved. One day in 1978 he shot a 79, at a course in San Clemente he described as "relatively easy." He had always considered a score of 80 to be a sort of "personal Everest." Knowing that he could not hope to improve on that score, and probably never match it, he never picked up a golf club again.
Picture from here
I may have watched my last professional football game.