So...I'm desperate to improve my upper body strength. It's really, really shitty right now--to the point where if we have to do 50 pushups in a row, I have to do them against the wall because I can't do 50 correctly on a box. Since I don't have a lot of extra time to workout any more than I already do, I'm thinking that I'll just start doing a couple pushups whenever I can at work or at home, against a counter or desk. Would daily, random pushups like that be helpful to my goal of improving my upper body strength or would it be detrimental because I won't be giving the muscle groups sufficient rest to recover? Is the whole--you shouldn't lift weights two days in a row thing true, or is it just BS conventional wisdom?