I’ve been executing push ups for awhile now, they have worked on my chest, triceps and core. The action requires for you to push yourself off the ground using your arms. Keeping the back straight and arms shoulder width apart. Push-ups exercise use the pectoral muscles, triceps, and anterior deltoids, with ancillary benefits to the rest of the deltoids, serratus anterior, coracobrachialis and the midsection as a whole.
Here is a video below on how to perfectly execute a push up and how to avoid wrist injuries as well.