How to do it
Press firmly through the ball of your standing foot to stay balanced.
- 1
Stand with your feet hip-width apart and hands behind your head, elbows flared out.
- 2
Shift your weight to your left foot and lift your right knee towards your right elbow while bringing the elbow down towards the knee.
- 3
Touch your elbow to your knee, or get as close as possible, engaging your side abs.
- 4
Return to the starting position and repeat on the other side.
- 5
Alternate sides with each repetition, performing the movement in a controlled manner.
Expert tip
Focus on contracting your oblique muscles as you bring your elbow to your knee, and keep the movement controlled to avoid using momentum.
Common mistakes
- ✕Yanking the head forward with the hands
- ✕Leaning from the hip instead of crunching
- ✕Dropping the standing knee inward