Rather than really working the biceps, hammer curls stimulate the brachialis and brachioradialis. The brachialis muscle is located beneath the biceps while the brachioradialis sits along the top ...
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The best arm workouts for mass: Pump up your fitness routineMuscular biceps help you rotate your forearms and bend your elbows. During this movement, you’ll also work your brachialis, deltoids, forearms, and core as you stabilize your upper body.
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