Working both heads: “Incline Dumbbell Curls- The incline dumbbell curl is an effective biceps exercise that strengthens both heads of the biceps brachii. Sit back on a 45 to 60 degree incline bench. Hold two dumbbells with your wrists facing your knees. Slowly curl your right arm up and rotate your elbow so that your palm with the dumbbell is facing your left shoulder. Lower your arm to the starting position and simultaneously lift your right arm to your shoulder. Continue alternating arm curls until you reach your desired amount of repetitions..” Source