Sore knees from pounding the pavement? Tired of staring at a wall while doing treadmill intervals? Trade in joint-jolting running intervals for a tough and zero-resistance swimming workout. After a thorough warm-up and stretch, hop into the water for some 50 meter intervals, with 15 to 30 seconds of rest between each set.

Do it Today: Hit the (pool) deck for a full-body workout that’s easy on the joints.

Spin Cycle:

Take the stationary bike to the next level with tempo intervals.

Chow Down:

Learn how to fuel up before, during, and after a workout to get the best results.