Single Arm Negatives: Preacher Curls! This exercise is an incredible way to increase the size and strength of your biceps without needing a spotter. You lift the weight up with both arms and then slowly lower the weight using just one arm. You will feel the burn and notice how quickly your bicep fatigues. . Shorts by @tenthousand.cc Code: VARCAS . #arms #armexercise #biceps #bicepsexercise #bigarms #armstrength #alecvarcas #getrippt #rippt #body #muscles #strength