Begin in a high plank position, arms directly under your shoulders and feet touching. Pull your core in toward your spine.
Jump your feet toward your right side, landing softly and bringing your knees toward your right elbow. Your torso will twist to the right. Keep your core engaged and your wrists directly under your shoulders throughout the movement.
Jump your feet back to plank, landing softly.
Repeat on the other side.
This counts as one rep. Complete as many reps as you can with proper form in 20 seconds.