Lifting weights makes you stronger, faster and more flexible. It will not interfere with the coordination that you need for such fine muscle movements as playing the piano or shooting a basketball. Muscles are made up of two different types of fibers. When you strengthen a muscle, you train the same fibers that also make you faster, so strength training helps you to move faster. Coordination is controlled by the ability of your brain to coordinate the more than 500 muscles in your body.
Strength training can improve coordination in events requiring strength.
Stronger muscles use fewer fibers for the same task and therefore are easier to control. When you lift a heavy weight, your muscles stretch before the weight starts to move. I'm Dr. Gabe Mirkin on Fitness. Med Sci Spts Ex. Dr. Mirkin's opinions and the references cited are for information only, and are not intended to diagnose or prescribe.