According to an article by Nike, weightlifting does not make you shorter. Many rumors state that when a sport is started in years of youth, it can stunt one's growth and they will continue to be short throughout their life. There are different ways to go about these sports and rumors, but weightlifting is a sport that does not stunt your growth or make you shorter. Doing the correct stretches and exercises should have no impact on your height, and if anything, should make you a bit taller. As the different muscles are being worked, it should directly correlate with stretching, which should help to prevent any negative effects.