There are a seemingly endless number of new products on the market, and they pretty much all claim to be the latest and greatest in fitness technology. So we asked our friend, Dr. Ian Smith, who literally wrote the book (well, actually, SEVERAL New York Times bestselling books) on fitness to introduce us to five of the hottest trends in fitness right now.
You can increase the efficiency of your workout by "building up your resistance, increasing your muscle size and burning calories."
