Ryan Inzana With a new UMPG deal unlocking ''hundreds of thousands'' of tracks, the virtual reality platform is betting that the future of fitness involves big hits and headsets. As gyms across the United States closed or offered limited-capacity workouts over the past year due to ongoing pandemic safety restrictions, some fitness junkies transported themselves to an Icelandic lake or an Ethiopian volcano for a virtual reality workout. Supernatural, the subscription-based VR fitness app launched last April by tech company Within, has allowed users to strap on an Oculus Quest headset from the comfort of their homes and enjoy a choreographed cardio workout to uptempo hits.