Hold a dumbbell in each hand at shoulder height. Lower into a squat, keeping your chest up and back straight. Push through your heels to stand while pressing the dumbbells overhead. Perform 10 reps.
Functionally, the biceps are key players in elbow flexion (bending the arm), forearm supination (rotating the forearm so the palm faces upward, like turning a doorknob or opening a jar), and shoulder ...