I have recently stopped doing push ups. I noticed that whenever I do them, I get horrible back pain especially after I'm finished doing push ups and (I do them at night a lot) the next day. I thought it was just normal to have pains in my back after exercising, so I thought it would go away. But no. It lasts like up to two and a half weeks after I do the push ups. I am wondering if maybe I just don't exercise enough, and I have a weak back? Anything that stops this problem? I'm skinny.....I wouldn't say I'm in shape though but I'm definently trying to exercise, and now I can't do push ups so I need to solve this somehow. Anyone else has this problem, and what do you use to stop it? I don't think it's fair, because finally at a time in my life I am at the point where I want to exercise (push ups especially) and I can't because of the horrible back pain during and a LOT afterwards. It hurts. Someone help?