As the name implies, you'll certainly gain some muscle tone on an Eco X Fit stand-up paddleboard excursion. But for those who embark on these water-skimming journeys, fording the great outdoors in a picturesque halo of salt and wind, getting fit is almost beside the point. Adventurers can make a trek on their own, or they can choose the support of a guide and group. These expert-led excursions can be as local as Fort Lauderdale or as far-flung as the Bahamas. In fact, sometimes they're not on the water at all, with the staff guiding occasional forays up indoor rock climbing walls or to the unseen, squishy side of the moon.