Fitness pants, also known as pedaling pants, were a popular garment in the 1980s and 1990s. Due to different regions, there are many nicknames for pedaling pants and pedaling pants. It is a blend of silk and suitable man-made fibers. Very elastic, similar to dance pants. It is wide at the top and narrow at the bottom. The bottom of trousers is tied with a belt or directly designed into a ring shape, so that when you step on it, there will be a sense of stretching, which will set off slender legs and reflect a kind of line beauty. Taobao search has it, and so do sporting goods stores.