Traditional pushups are beneficial for building upper body strength. They work the triceps, pectoral muscles, and shoulders. When done with proper form, they can also strengthen the lower back and core by engaging (pulling in) the abdominal muscles. Pushups are a fast and effective exercise for building strength.
Start in a high plank position. Place hands firmly on the ground, directly under shoulders. Ground toes into the floor to stabilize your lower half. Brace core (tighten abs as if preparing to take a punch), engage glutes and hamstrings, and flatten your back so your entire body is neutral and straight.