I suggest that when junior high school students go to the gym to exercise, they can run on the treadmill first, and don't touch the sports equipment that they haven't touched easily, because you don't know how to use it correctly.
If used improperly, it is likely to cause damage to joints. I remember the first time I went to the gym, I couldn't use the fitness equipment there. The fitness instructor saw my movements and said that what I did was not standard. Not only could I not exercise, but it would also do harm to your health.
So when you first go to the gym to exercise, if you don't have a fitness coach around you, don't touch those fitness equipment yourself, only under the guidance of the coach.
In addition, junior high school students don't mind using sports equipment such as weightlifting barbells when they go to the gym, because these equipment will cause heavy damage to their bones. Junior high school students are in the stage of physical development. If these devices are used, their height will be affected.
In addition, junior high school students are in the golden stage of growth and development, so we must pay attention to adequate nutrition intake during this period. Be sure to have a full meal before going to the gym, and never go to the gym hungry.
Be sure to drink at least one glass of milk and eat two eggs every day, so as to ensure adequate intake of protein and calcium and contribute to the growth of bones.
There will be some classes in the gym to teach yoga and spinning, and junior high school students can follow them, but they must do what they can and never try to be brave, because junior high school students are still very delicate and not really mature at this time, so don't put too much pressure on themselves.