Assume a plank position. Forearms on the floor, elbows under the shoulders, feet together.
Get into Posterior Pelvic Tilt (Tuck your tailbone) and squeeze your glutes. Protract your scapula (Push your shoulder blades apart) by driving your forearms into the floor.
Clench your fists, engage your lats by squeezing your elbows inwards. A straight line should form from your shoulders to your heels.
Maintain total body tension as you raise one foot off the floor. Pause and then lower and switch sides.
Try to maintain your posture as you raise your foot, hips and shoulders stay square, & everything stays tight.