Jack Knife (Get Up)
- Body weight
1) Sit down on the floor - keep the chest up, back flat and core tight. Your knees should face upwards. Place your hands either side to support you.
2) Lift your tailbone off the floor by extending your arms. Keep the core engaged at all times.
1) Lift your right arm and left leg off the floor and crunch in the centre - aim to touch your toe.
2) Pause at the top. Now gently return to the starting position.
3) Repeat on the other side.