Car's don't self repair. If I go lift heavy weights, my bones self repair and get stronger. If I sit on my butt all day on a computer, my bones get thinner an

Car's don't self repair. If I go lift heavy weights, my bones self repair and get stronger. If I sit on my butt all day on a computer, my bones get thinner and weaker. No matter how much you drive a car, it is never going to get "stronger", only slowly wear out. Since you are a human and not a car, I would suggest you maintain your body like it is alive and not made of metal.