When it comes to building bigger arms, most people just do more bicep exercises. But it’s actually the triceps that are your secret weapon for filling out your shirt sleeves. They make up two-thirds of your upper arm size. The issue, according to Strength Coach and Physical Therapist, Jeff Cavaliere, is that many people don’t train them effectively.
“When we’re talking about filling in those shirt sleeves, you’ve got to target the long head, because this is the head of the triceps that provides the most width, and it's the one responsible for that big gap or flatness that you’re seeing right now,” he explains in his latest YouTube video.
