If a standard push up is too difficult, start with the incline push up. This modification of the basic push up allows you to slowly progress until you get strong enough for basic push ups. You can start by doing push ups against a wall, a table or a sturdy chair. Stand several feet away from the object you are using and use the same push up technique as above to lower yourself until the elbows are 90 degrees and then raise back up. Keep you core tight the whole time.