Straight-Leg Bridge With Stability Ball

Puente sobre pelota de pilates

This exercise-ball move is great for working the core, too. Lie flat on your back and place the ball under your heels, with your knees slightly bent. Press heels firmly into the ball to raise your hips off the ground, coming into a bridge and actively squeezing your glutes as you lift. With control, slowly release your bum back down to the floor. This counts as one rep.