Crunches

1) Lie on your back with your hands crossed across your chest or with your fingers on the sides of your head.

2) Place your feet on the floor with legs bent.

3) To begin the exercise, lift your torso, lifting shoulder blades off the floor and crunching your rib cage towards your lower belly. Hold for two counts, then lower slowly to the starting position. Repeat.

Reverse Crunches

1) Lie on your back with knees bent, feet a few inches off the floor.

2) Slowly contract the abdominals, focusing on rotating the pelvis up and bringing your knees towards your rib cage. Concentrate on letting your abs do the work. Hold at the top then slowly lower your knees to the starting position.

3) Repeat.

Oblique Crossover Crunches

1) Lie on your back with knees bent, hands behind your head.

2) Keeping lower back pressed into the floor, lift your shoulder blades off the floor and then curl your upper body diagonally across your body towards your right knee.

3) Contract your abs and obliques as hard as you can at the top of the movement. Lower back down

4) Repeat on the same side before switching sides.