Hello, I use a stretcher to step on one side and hold one side with my hand, so that I can exercise my biceps. No, won't you grow taller?
This action of yours is called fitness bending. The function is to develop biceps brachii, as well as brachialis and flexors. You can practice 8 to 18 times at a time. Practice 2 to 4 groups at a time. Through such exercises, as long as you persist for a long time, you will definitely be able to develop biceps. And this kind of physical exercise is only good for your height, not bad.