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 12 reps. Reverse curl Lie on your back and lift and bend your knees at 90-degrees. Contract your abs to stabilise your torso, and bring your hips and knees towards your chest. Slowly return to the starting position. Do 2 sets of 12 reps. Oblique scissors Lie on your back with legs extended and arms behind your head to support your neck. Contract abs and lift shoulders off the floor. Use your oblique muscles by attempting to bring the left shoulder towards the right knee and the right shoulder toward the left knee. The right and left leg accounts for one rep. Do 2 sets of 12 reps.