The exercise is done in P.E. class.
The exercise is called "High school exercise".
Everyone complains about the exercise.
Because it is hard and embarrassed to do.
If I do the exercise before crowds, the crowds will say "What a fool boy!".
I think the exercise should be played by elementary school students.
I heard that different "High school exercise" are done high school by high school in Japan.
Maybe most of high school students agree my opinion.