World's Largest Group Workout Vi is on a mission to get the world moving in 2015. That’s why we’re challenging you to kick off your New Year’s health resolutions and help us set the world record for the World’s Largest Simultaneous Group Workout. Join us on January 3rd, 2015, in any of the thousands of locations across 11 countries around the world, to be a part of history, get moving, and have a blast doing it!