Lie on your front, hands under your shoulders. Push your hips into the ground and squeeze your buttocks.
Lift up into a plank position. Squeeze your buttocks and lift one leg up making sure to keep your hips level as you do so. Hold and slowly lower the leg back to the ground, reset and repeat with the other leg. This completes one repetition.
Keep your belly button drawn towards your spine to ensure you are protecting your spine and your tongue on the roof of your mouth to support your neck during this exercise.
Your eyes should be looking slightly forward and diagonally down to keep your spine in line throughout.