How to do it
Keep your elbows pointed out wide throughout each rep.
- 1
Stand with your feet shoulder-width apart and hands behind your head.
- 2
Lift your right knee towards your right elbow while simultaneously bringing your elbow down towards your knee.
- 3
Return to the starting position and repeat on the left side.
- 4
Alternate sides for the desired number of repetitions.
Expert tip
Keep your core engaged throughout the exercise to protect your lower back and enhance the crunch effect.
Common mistakes
- ✕Pulling the head forward with the hands
- ✕Leaning forward instead of bending sideways
- ✕Lifting the standing heel off the floor