Of course, a person's natural physical quality also plays a great role, otherwise there would be no such thin person as Miller in the nba. If you want to be strong, I suggest you go to the gym for an hour after playing basketball, eat more meat, eat five meals a day, and it will have obvious effects in a month. If you want to be thin and strengthen your flexibility, you should run for at least 5000 meters every day, and then eat less for dinner.