I've read around that it's not a good idea to exercise the same muscle daily, and I've recently begun doing push ups daily. so my question is, is it okay for me to do push ups daily, or should I do push ups and say take my rest day and do crunches/sit ups? personally I'd rather stick with the push ups daily, as it's one of the few exercise I really enjoy, but if I'm really gonna hurt myself (which I'm sort of doubting) I guess I could find something else to do. If it helps I'm a 16 year old male, with a thin/average build, and I'm 5 foot 9 inches, maybe 10 inches.