Does the heavy lifting is able fineness?

lift with your legs, not with your back. it could cause serious injury.

Bend your knees.

muscles and other assistant tendons in the human body .in the factory there what they call it Roller , which pull the the heavy weights and elevate it .

heavy lifters ( most of them were slaves )

Yes, because when you squat alot your bones get compact and you will eventually stop growingIf you are still growing now, lifting heavy weights won't actually stop you from growing so much as cause...