Start in a traditional plank position with your forearms on the ground and your body perfectly straight.
Bring your right knee forward towards your right elbow, then return to the plank position.
Repeat by bringing your left knee toward your left elbow.
Alternate sides for a total of 10 or 20 depending on your level.
m head to feet, resting on your forearm. Your elbow should be directly under your shoulder. With your abdominals gently contracted, lift your hips off the floor, maintaining the line. Keep your hips square and your neck in line with your spine. Hold 20 to 40 seconds and lower