Alternating dumbbell biceps curl

Instructions

Stand straight, knees slightly bent, straight arms along your body holding a dumbbell with a neutral grip in each hand.
Raise a dumbbell to your shoulder's level while twisting your wrist to end on a underhand grip (palm under the handle). At the same time, lower the other dumbbell to the starting position. Only your forearms should move: your elbows and the rest of your body are stationary.

Muscles