The term 'hula hoop' was first introduced in the 1950s when the lightweight plastic hoops became a craze that sold millions. Today, there are several synonyms for the traditional term that are worth noting. Other names used around the world include 'hoop dance,' 'whirl hoop,' 'gravity wheel,' 'twirler,' and 'revolving ring.' Some modern variations on this toy include 'smart hoop,' 'fitness hoop,' and 'light-up hoop.' Many people enjoy hula hoop-style fitness routines, which are great for toning the core while having fun. As such, it's no wonder that this ever-popular toy continues to inspire creativity amongst both beginners and professionals.