After puberty, as long as the weight does not exceed 45% of the body weight.
Strength training subjects such as dumbbell training will not affect height. All the weightlifters we see are short because, in order to get good grades, we will choose some short and strong athletes in the selection of athletes.
Another fact is that scientific moderate-intensity strength training for teenagers is of great benefit to their development; Training can not only make teenagers' muscles strong, but also make them psychologically strong, which can make them more accustomed to bearing pressure. Of course, dumbbell training can be used as a part of moderate-intensity strength training for teenagers.
If you are over 22 years old, you don't have to expect to grow taller. Dumbbells can be used to shape the body, improve strength or do functional training. If you are in adolescence, you should pay attention to the counterweight of dumbbells, and it is not advisable to use dumbbells that are too heavy for training. The total weight of a pair of dumbbells should be controlled below half of its own weight. And it is best not to exercise for more than 45 minutes at a time.