Most lifters with 300 pound bench presses think they've graduated from push-ups. They think that since they can lift so heavy now, a simple push-up can't deliver any benefits for their strength or development.
But test half of these heavy-lifting guys out on a straight set of strict push-ups and you'll see them start to shake like a leaf around rep 15. That's absolutely pathetic. Being strong doesn't mean you're in shape. And if you think push-ups are a chest exercise, you have a lot to learn, young grasshopper.
In truth, push-ups hit almost everything on the anterior chain (especially the core) while giving your shoulder blades a chance to move in a healthy manner during a pressing pattern for a change, since they're not pinned against a bench.
If you have push-ups down pat, then take a look at adding some of these advanced modifications to your program:
I don't care how much you can lift – if you're not good at a bodyweight staple like push-ups then you have some work to do, and maybe some weight to lose.