Begin with your knees on the floor and feet on a raised surface such as a bench or chair
Place your hands flat on floor directly underneath your shoulders, now lift your knees off the floor so your body is in a straight line from heels to shoulders
Slowly lower yourself towards the floor until your chest is a few inches from the floor
Now slowly straighten your arms again until they are almost straight
Tips
This is one of the hardest of the push ups so be sure you can manage at least 10 normal push ups before attempting this
Be sure to avoid locking your elbow joints when you raise yourself up to the starting position again
Please make sure the surface you place your feet on wont slip in mid exercise