1. Abdominal crunch
Lie on your back with your knees bent, and your hands behind your head. Lift your shoulders off the floor and curl your legs towards your ribcage; simultaneously. Slowly, return to starting position.
Do 2 sets of 16 reps.
2. Reverse curl
Lie on your back and lift and bend your knees at 90-degrees. Contract your abs to stabilize your torso, and bring your hips and knees towards your chest. Slowly return to starting position. Do 2 sets of 16 reps.