The wide-stance plank with a diagonal leg lift increases strength and stability through the entire core region including the lower back. The wider-than-normal stance slightly reduces the difficulty of the exercise.
Instructions
Get into a plank position resting your weight on your forearms instead of on your hands. Move your feet out wider than your shoulders. Lift your hips off the ground forming a straight line from your shoulders to your feet. This is your starting position.
Brace core and without moving your body, lift one leg off the floor in a diagonal direction. Hold and then lower the leg back to starting position.
Trainer’s Tips
Make sure to control the entire range of motion. Guide the legs instead of letting them fall freely.