How to do it: Place your towel on the floor in front of you and press up into a full plank, palms resting on top of your towel. Brace your abs in tight and bend your left knee in to your body, pressing the inside of your left foot on your right inner thigh.
Slowly rotate your hips (and right foot) to face the left and lift your left arm straight to the ceiling. Turn to the left until your body is in a full side plank with your left knee open to the ceiling and the bottom of your foot pressed on your right inner thigh, balancing on the outside edge of your right foot.
From here, slowly rotate your body back into your start position and then switch legs and repeat to the other side. Do 10 reps in total, alternating sides each time.
Form tip: If this is too challenging, keep both legs straight and use both feet to ground you during your side and full plank positions.
Photos were shot at Canyon Ranch Miami Beach