Underhand close grip pulldowns: the best bicep exercise? No, not even close… its a decent back exercise. But for biceps, any curl variation will be much better at actually building your biceps. Preacher curls, cable curls, dumbbell curls, etc all are much better at isolating and actually targeting your biceps as the main muscle of the exercise performed #underhandpulldown #latpulldown #bicepsworkout #bicepexercises #bicepstraining #bicepcurl #pulldayworkout #gymtipsforbeginners #bodybuildingtraining #bodybuildingtips