The chest push up with a resistance band is one of my favorite exercises for building strength and muscle for the chest. And, all you need is a resistance band. If you don’t have one, get one. You’ll need it for several exercises that I recommend.
The push up by itself is already a good exercise. By adding a resistance band, you make it even better. You’re not only pushing your own bodyweight, but you’re adding resistance at the top of the press.