PHILADELPHIA--(BUSINESS WIRE)--Comcast and Gaiam TV, an innovator of online streaming yoga and inspirational video content, announced the launch of Gaiam TV Fit & Yoga, a subscription-based Video On Demand service providing Xfinity TV customers with access to premium yoga and fitness training directly on the TV. Gaiam TV Fit & Yoga offers customers access to fitness programs from the world’s best yoga instructors and fitness trainers, including Jillian Michaels, Rodney Yee, Leslie Sanso