I think it's not good for youngsters, but if they want to win the Olympic games, they have to practice many hours every day. Most young people want freedom, but if they want to accomplish something, it is important that they accept some restrictions. Maybe they feel very annoyed and they want to stop their practice, but these feelings are connected to their strong will to win the Olympic games. But it is more important that they take holidays sometimes. They have to refresh their feelings, so they can practice with new spirit.
Most Olympic athletes start practicing sports in early childhood.
The practice is very hard. Sometimes they cry, but they continue the practice because they like their sports. I was surprised because the girl was only 6 years old. In China, if they become Olympic champions, they are given much money by their country. So even if they don't like their sports, they have to do it all their lives.