A chin up is a variant of a pull up where your forearms are supinated, allowing you to grab the bar with an undergrip. The main muscle working here is still the latissimus dorsi, and it's still a compound exercise which uses a lot of helper muscles, but there are two key differences. Firstly, in a chin up, your biceps and brachialis are perfectly aligned with the line of grip tension, which allows them to engage really hard and help the movement. Secondly, because the elbows are in front of your

How to Build Bigger Forearms Fast | Skinny Arms Fix

4 Dumbbell Exercises for Bigger ARMS & Stronger GRIP

🔥 The Forearm Workout Most People Never Do Most people train biceps and triceps but ignore their forearms. Strong forearms improve grip strength, wrist control, lifting performance, and give your arms a thicker, more powerful look. Train with slow, controlled reps and never rush the movement. 💪 • Train: 2–3x per week • Rest: 45–60 sec Forearms are the detail that completes your arms. Save this and come back stronger. 💪