Black Widow Knee Slides

In this bottom-up rotation exercise movement, you’ll cross your knee over and drive it into that opposite elbow. Start in high plank position (or tabletop position) with hands directly beneath your shoulders. Lift the left knee toward the right arm and slide it up the forearm to get more of that posterior pelvic tilt and engagement of the abdominal muscles. Then do the opposite side, bringing your right knee toward your left hand.