Do sit-ups after getting up. Wake up in the morning and do sit-ups directly in bed before getting up (for example, 30 times).

2

The secret walking exercise method needs you to have a sense of exercise inside.

three

Running every week, teenagers are busy with their studies and usually sit and study more. Your body is eager to get enough exercise (unfortunately, you often don't notice it).

four

Pull-ups have many advantages, and there are horizontal bars as sports equipment in schools, so we should make more use of them, otherwise it will be too wasteful.

five

Ball games make people sensitive. Ball games can exercise people's sensitive reaction ability and make them strong.

In a word, physical exercise should become the normal state of life, and active exercise from teenagers can benefit people for life.