High Intensity Sprints Help Keep You Trim
Instead of long-duration aerobic activity, sprint up a hill. Bonus points if it's a sand dune. "Even though you will slow down, hill sprints are especially effective because you have to work against gravity," explains Stolz. "Find a hill with a moderate incline and sprint up as fast as possible. Then, walk down the hill slowly, taking deep breaths for your rest period." Repeat at least four times.