If You Want to See Muscle Definition Faster, Halle Berry's Trainer Says to Do This

If you've already perfected a plank, try the planche plank progression. To do it, start in your plank position with your hands turned out to the side and then shift your weight forward. You're definitely going to feel this one in your arms and abs!

If you like mountain climbers, you're going to love the atomic climber. In a plank position, simultaneously jump both legs into your chest. Then shoot them back out, returning to the starting position.

If you've mastered the air squat, challenge yourself with the pistol squat. Balance on your left leg and extend your right leg out in front of your body. With control, lower down as far as you can go, and then return to your starting position.