This exercise should not be performed if you suffer from lower back problems. If you are unsure about your ability to attempt this exercise, consult your GP.
Support your body on your forearms and knees, your elbows should be inline with your shoulders. Straighten your legs and raise your body so you are supported by your forearms and the balls of your feet. Keep your feet hip width apart and try not to stick your bottom in the air or let it dip too low. Your body should form a straight line from your head to your feet. Hold this position while looking at the floor. Hold for 30 seconds to begin with and increase the time as your strength improves.