Targeted Muscle Groups: Abs
How to do full extension crunches step by step:
- Sit on the edge of a swiss ball so that your feet are flat on the floor and the swiss ball is at the base of your back
- Extend yourself backwards over the swiss ball and lower yourself towards the ground holding for a two count when abs are fully extended
- Contract your abs and raise back up to the starting position
Swiss Ball Alternatives: If you do not have access to a swiss ball you can replace it with a stack of folded towels or 2 or three pillows.