Building serious arm size takes more than pressing on repeat. To fill out a sleeve and add lockout strength, put the triceps extension in regular rotation. This classic elbow‑extension move is one of ...

Good things always come in threes: fairy godmothers, parts of a combo meal, boy bands made of brothers (Hi Jonas and Hansen!). So it’s no surprise the most eye-popping muscle in your arms is, in fact, ...

The triceps brachii is a three-headed muscle that plays a critical role in elbow extension, pressing strength, and upper arm development. Its long, lateral, and medial heads each contribute ...