Why it's on the list: Unlike other muscle groups such as the back, you have plenty of choices to train your triceps with body weight alone. So consider this a bonus addition to this list! And if you're an aspiring bodyweight bodybuilder, you need to know the close-grip push-up.
Traditional push-ups are usually done with the hands just outside of shoulder width to allow the pecs to do most of the work. But bringing your hands in and tucking your elbows can produce greater muscle activity in both the triceps and the pecs.
Close-Grip Push-Up Variations for Triceps Growth:
In your workout: Do this as a finishing exercise. If sets from your toes are too easy, put your feet up on a bench or have a partner put a weight plate on your back.