The method you mentioned has never been heard of stovepipe. But climbing stairs on tiptoe can thin your legs. The method I said is more effective. A few years ago, several friends and I insisted on climbing stairs 1 month, and several people, including me, had obvious effects. But I haven't exercised this method for two years, because my feet are killing me. If there are few friends, everyone will climb the stairs while chatting. Everyone encourages each other, and it is difficult for a person to persist.