Not only does it not hinder, but it is beneficial to grow taller. Fitness will make people secrete more growth hormone, so it is beneficial to grow taller. Of course, don't overtraining. You see those weightlifters are all short, because they chose a short one when selecting people, so they can do less work and lift weights. You can do more stretching exercises such as push-ups and squats, and don't do too much weight. Everything else is fine. Be careful not to get hurt, and do warm-up exercises first every time.