Start in a tall plank with your shoulders over your wrists, your spine parallel to the ground, and your navel pulled in.
Bend your elbows and lower down into a push-up position.
Straighten your back to plank and rotate to the right into a side plank. Your heels turn to the right, opening your chest and reaching your left arm up toward the ceiling.
Come back to plank, do a push-up, and rotate to side plank on the left side.
Repeat for 30 to 90 seconds, followed by a zero to 15-second rest.