Andrew Kwong on Instagram: "Size & Shred Training program 👉🏻 deltabolic.com Bicep Curl Grips & Muscles Worked 💪 Supinated grip (palms up): Maximizes biceps involvement Neutral grip (palms facing each other): Shifts more load to the brachialis and brachioradialis Pronated grip (palms down): Places greater emphasis on the brachioradialis All curl variations still train the biceps, brachialis, and brachioradialis to some degree—but changing your grip shifts which muscle takes on more of the work