Scissors ( legs )

Muscles worked

You need

How to do it

1. Lie on your back with your arms along your sides and raise both legs off the floor, holding them low and straight.
2. Open your legs slightly apart, then cross one over the other, and keep alternating which leg is on top with every cross.
3. The lower your legs travel, the harder your abs have to work to keep your lower back pressed into the floor - and pressed it must stay, for every single rep.