When it comes to shaping up the brachialis muscle, there are a few exercises that stand out above the rest. One of the best exercises for targeting this muscle is the hammer curl. The hammer curl is a simple exercise that involves holding a pair of dumbbells at your sides with a neutral grip (palms facing each other) and curling the weights up towards your shoulders.
By keeping your palms facing each other throughout the movement, you place a greater emphasis on the brachialis muscle. Other effective exercises for targeting the brachialis include reverse curls and preacher curls. Incorporating these exercises into your arm workouts can help you achieve a more well-rounded and defined upper arm.