My girl Viv over at LiveFastMag.com just returned from a month-long joie de vivre around Europe. I envied her vivid trail of euro-Instagram fun (displayed beautifully on her tumblr, if you’re curious) and her many adventures. Notably, she came back with this interesting explanation of how French women don’t get fat: Bathtub bicycles. The first ever workout jacuzzi. Read all about the Waterbike on Live Fast. Filed under spa-ish.