Forgetting to Rehydrate and 5 More Terrible Mistakes You're Making After a Workout

"A good post-workout stretch will help your body get the maximum benefit of your exercise. Stretching keeps your muscles from contracting, which will better allow them to rebuild after your workout," Costich said. "Over time, stretching will also help increase your mobility and range of motion, which will really give you an advantage in your future workouts — you'll be able to improve your form, perfect your technique, and push even harder with less risk of injury."