6. Hip Raise/Leg Raise

Instructions: Lie down on a flat bench with your legs up and perpendicular to the bench (hold the bench behind your head for stability). Lift your hips slightly off the bench by contracting your lower abs, hold for three seconds, and lower your hips. Keep your back flat on the bench, your legs straight and lower your legs until they almost form a straight line with the rest of your body. Hold for a count of three and bring them back to the starting position. Do 10 reps.