Start by lying on the ground, with your lower back pressed flat into the floor and your head and shoulders raised slightly above it. Place your hands lightly on the sides of your head. Lift one leg just off the ground and extend it out. Lift the other leg and bend your knee towards your chest. As you do so twist through your core, so the opposite arm comes towards the raised knee. Lower your leg and arm at the same time while bringing up the opposite two limbs to mirror the movement.

Repeat 20x