"We live our lives in a three-dimensional world so why not train in one as well," said Paul Katami, group exercise manager of /*Equinox*/. One of his favorite functional workout tools is the ViPR.

NEW YORK (Reuters) - It looks like just a perforated rubber pipe but when the ViPR is flipped, hoisted, rolled, dragged and thrown in endless variation advocates say it may be the most versatile ...