How to do it
Exhale fully as the elbow and knee draw together at the top of each rep.
- 1
Lie flat on your back with your legs extended and arms extended overhead.
- 2
Simultaneously lift one arm and the opposite leg, bringing your elbow and knee towards each other above your torso.
- 3
Lower back down to the starting position with control.
- 4
Repeat with the opposite arm and leg.
- 5
Continue alternating sides for the desired number of repetitions.
Expert tip
Ensure a full contraction of the abs with each rep and avoid jerky movements to prevent strain on the neck and back.
Common mistakes
- ✕Arching the lower back off the floor
- ✕Craning the neck forward toward the chest
- ✕Bending the working knee past 90 degrees