i also do pushups everyday, what people don't understand is that even tho pushups work the chest delts and tris, their being work differantly,,think about this, when u workout with weights say bench press or shoulder press only ur arms are moving,,when u do bent over rows,,or upright rows, only ur arms are moving however when u do a chin or pushups ur arms are still and ur whole body is moving threw space,,it's harder on ur muscles and hits it differanlly thats why my friend that the squats are so damn taxing cause in the exserse ur legs are still and u have to press ur body weight PLUS the weight on ur shoulders!! thats why also the chinups are much better than machine pull downs for the same reasons sure a man can bench press 300lbs but ask a 300lb man how many pushups he can do if its more than 10reps than thats strenth,,,,the pushups are number one in my book,,,,,,i'm done,,,