shoulder workout for size - LATERAL RAISES! If we do our lateral raises when standing tall, our humerus will get very close to the acromion, which is gonna stop it from moving any further secreasing the room within the humerus will move within and decrease The total ROM. On the other hand, if we tilt our torso just a little forward (about 20 degrees) while still keeping our arms vertical, the acromion will shift a little forward, creating room for the humerus to move through when raising