Roll up your yoga mats and deflate your Swiss balls. You probably haven't used the latest work-out fad - the Hula Hoop - since you were at school. This time around, though, it is a souped-up ...

Hula hooping is so commonplace that we may overlook some interesting questions it raises: “What keeps a hula hoop up against gravity?” and “Are some body types better for hula hooping than ...

Hula hooping is so commonplace that we may overlook some interesting questions it raises: "What keeps a hula hoop up against gravity?" and "Are some body types better for hula hooping than others?" ...