The Side Plank
This exercise focuses on working your obliques and your low back.
Lying on your right side on the mat, your legs should be together with your feet one on top of the other. Put your left hand on your waist or rest your arm along your side. Keep head and neck straight and aligned with your spine.
To start this exercise, prop your upper body on your right forearm making sure your elbow is below your shoulder. Press hips toward ceiling. Hold for 15 seconds, and return to start position. Increase hold time as you progress with this exercise. To add difficulty, lift top leg and arm into a “starfish” position.