Lie on your left side, with legs and feet stacked; your knees, hips, and shoulders should be in alignment. Prop yourself up with your left arm while keeping your shoulders, neck, and spine relaxed. (Your abs should be tight.) Push upward with your hips and glutes. Hold for 30 seconds, then return to the start position. Do two repetitions on each side.
Workout clothes, Lulu lemon Athletica. Sneakers, Reebok.