First of all, we can sit with a book between our legs, because this can exercise our leg muscles and prevent our legs from getting thicker. Moreover, as our family becomes more and more proficient in books, we can gradually make books thinner and thinner. If we exercise for a long time, we can not only make our sitting posture better, but also achieve the goal of stovepipe. Why not?
Secondly, don't keep your legs still for a long time when doing it, that is to say, you can change your posture more, do more leg stretching exercises, so that your legs have a certain amount of exercise, and at the same time avoid crossing your legs, because this will lead to poor blood circulation, which is a very bad habit.
We can still stand against the wall during recess or work, because we have been doing it for a long time. Proper standing can also have a certain good effect on our stovepipe, or it is very important to do some proper stretching exercise.
In fact, all these methods have certain effects, but the most important thing is that we should find time to do some fitness exercises after work or after school, because this can not only achieve the goal of stovepipe, but also improve our physical fitness.