1 Don't worry about being underweight.

You are now in the development stage. In the rapid growth period of your body, you develop vertically first and then horizontally. So don't be too eager for success.

2 diet

If you want to keep in good shape in the future, don't believe in the so-called western-style diet with high fat, high calorie and high protein for two reasons: first, if you don't control it well, you may become a fat man with more fat than muscle; Second, when the body metabolizes food, it also consumes a certain amount of energy. A nutritious diet will increase the burden on your spleen and stomach and disturb the normal metabolism of your body.

The correct way is to ensure a balanced and appropriate diet, and on this basis, increase the energy supply ratio of protein and carbohydrate, that is, adjust the energy supply ratio of carbohydrate, protein and fat to about 55%:35%: 10%. Generally speaking, the rice and flour we usually eat mainly provide carbohydrates. protein had better choose high-quality protein, such as fish, meat, eggs and milk. Beans are also the source of high-quality protein. Don't choose those greasy fried chicken pieces or chips for fat. Nuts such as peanuts and walnuts are better, because they are also rich in protein and polyunsaturated fatty acids, which contribute to brain development and make people smart.

3 fitness

Just doing push-ups and sit-ups can hardly exercise leg muscles.

Since it is necessary to exercise "chest muscles, abdominal muscles, arms, thighs and calves", a single exercise may make the lines of the body uncoordinated.

I have the simplest way to suggest you play basketball, because basketball is a whole-body exercise, which can exercise almost every muscle of the body, not only build muscles but also exercise your coordination ability, so that you can drive your brain to develop from the cerebellum. Three times a week, 40 minutes of exercise each time is enough. By the way, you can improve your feelings with your classmates ~ do 20 push-ups after you go home and strengthen your upper body exercise every day.

When doing mechanical exercise, try not to move too fast. Maintaining a steady speed is more conducive to the formation of your muscle lines.

As for your daily calorie intake, I don't have a manual with me now, so I can't find out to help you. If you are a high school student, I estimate that it is between 2400 and 2800 kilocalories. This value is for reference only.

4 others

Develop good work and rest habits, and ensure that you sleep before 1 1 every night, and that you sleep for 7-8 hours every day. Morning is very important. Be sure to eat enough. You can take the form of three meals at two o'clock, that is, between breakfast and lunch, between lunch and dinner, you can add a fruit or a cup of cereal.

Finally, I appreciate your willingness to manage your health at the age of 17. A person who has the ability to manage his own body will also have the ability to manage other things. I hope my suggestion will help you ~