How to do it
Keep your lower back pressed flat against the floor throughout.
- 1
Lie on your back with your hands behind your head and legs raised, feet pointing towards the ceiling.
- 2
Contract your abs and lift your shoulders off the floor in a crunch motion while simultaneously lowering one leg to just above the floor.
- 3
Return to the starting position and repeat on the opposite side, alternating legs with each crunch.
- 4
Continue alternating for the desired number of repetitions.
Expert tip
Control the movement with your obliques and avoid using momentum to ensure maximum engagement of the targeted muscles.
Common mistakes
- ✕Pulling on the neck with the hands
- ✕Dropping the lowered leg too quickly
- ✕Excessive torso rotation during the crunch