Go down on your hands and knees.

Keep your hands flat, shoulder width apart and slightly forward. Extend your knees back as far as possible.

Keeping your abdomen tight and your neck in line with your spine, bend your elbows and lower your chest one fist distance from the floor.

Aim your head right between your hands, then push up to the starting position, keeping your elbows soft at the top.

- Keep your back straight and don't lock your elbows.