Some version of the Hula-Hoop has been around for millennia, but the popular plastic version was introduced by Wham-O in the 1950s and quickly became a fad. Now, researchers have taken a closer look ...

Silver glitter glints off Amanda Alvarez’s cheeks as she loops a hula hoop around her head and tosses it into the cloudless summer sky. As the 22-year-old Cal Poly student runs through a hands-free ...