Of course, people and cars use smart hula hoops. I used to use ordinary hula hoops, and I couldn't lose weight at all. After a while, as long as there is something wrong with my strength, the hula hoop will fall off. I'm afraid picking up a hula hoop will lose weight more than using it. Later, I bought a smart hula hoop for people and cars, and I lost 15 kg in one month.