They go too heavy on biceps and too light on triceps. Or they do the opposite. Either way they're leaving size on the table, and they don't even know why their arms aren't growing. Here's what I've learned. Your triceps make up about two thirds of your arm. Two thirds. Which means if your arms aren't where you want them, the answer is almost always your triceps, not your biceps. Most men obsess over curls and ignore the back of the arm completely. Or they do a couple of half-hearted pushdowns at the end of the session and call it a day. That's not training triceps. That's going through the motions. For me, arm training is about isolation and connection above everything else. On biceps I want to feel the stretch at the bottom and the peak contraction at the top on every single rep. On triceps I want to feel that hinge, the elbow locked, the forearm moving, nothing else. Four to six sets. Twelve to sixteen reps minimum. Slow on the way down. Full connection throughout. That's how you build arms that actually look built, at any age. What does your arm training look like right now, are you spending more time on biceps or triceps, and do you think the split is costing you size? Drop it below. 👇