This Olympian's 2 Favorite Leg Exercises Will Work Your Booty and Core, Too

Colleen uses barbells for this exercise. "We usually do like three-quarters of our body weight to start, and then add on a little bit each set," she told us. Below, see how to do a basic deadlift, and find more deadlift variations here.

• Holding the barbell (or two dumbbells at your side), keep your arms straight and knees slightly bent.
• Slowly bend at the hips (not your waist) and lower the weights as far as possible without rounding your back, which should remain straight.
• Squeeze your glutes and engage your core to slowly pull yourself up (don't use your back).
• Do three sets of 12 reps. If you're lifting heavier weights like Colleen, do three sets of five or six reps.