Start by lying on your right-hand side, legs out straight, with your right arm at a 90’ angle in front of you (so your lower arm is flat on the ground, hand on the floor in front of you).
With one foot stacked on top of the other (or your left foot on the floor slightly behind the right, if that’s easier), lift your hips so that the only parts now on the floor are your feet and forearm.
Once stable, extend your left arm into the air straight above your head.
Rotating from the waist, bring that arm down and thread it through the gap under your hips.
Reach as far as you can before bringing the arm back through and up into the air.
Repeat on the other side.

Nail side plank rotations for a stronger core