How 15 highly successful people stay in shape

The most successful people know that exercise is the key to mentally and physically pushing themselves further, though some are more willing to keep up the habit than others.

Numerous studies have found exercise to be one of the most important habits you can develop to transform your life. Working out can make you healthier, happier, and better able to sleep; it can boost your memory, concentration, and mental sharpness; and you don't need to spend a lot of time doing it to reap the benefits.

From tennis to surfing to basketball, here are the exercise habits of 15 successful people.

Vivian Giang contributed to an earlier version of this article.