- Body weight
1) Lay on your back. Lift your legs up towards the ceiling so they're around a 45 degree angle. Now, raise your arms up so they're near parallel to the legs.
1) Curl up by tightening the abs - aim to touch your toes.
2) Pause for a second at the top - your body should look like a 'V' at the endpoint. Now, gently lower yourself back to the floor.
Note: try keep your legs as straight as possible.