Chrunches the best home ab workout

This is a slight variation of the sit up, but it requires less movement of the lower back and will be slightly more comfortable.

1.Start in the same position as you would for a sit up, but then lift your knees and bring them up towards your chest.

2.Curl your torso up but raise your upper body just enough to lift your shoulder blades off the floor.

3.Squeeze your abdominal muscles for 2 seconds and then return to start position.

Again, repeat as many times as you can in 20 seconds, resting for 10 and then repeat until you can manage 100 repetitions at each workout