Kinect for Xbox 360 found success by appealing to the fitness crowd. Microsoft hopes to capture that magic once again with Xbox One, this time with a subscription-based service.
Using the next-generation Kinect, Xbox Fitness will let players train with Jillian Michaels, Tracy Michael, P90X, Insanity, and more. The new Kinect promises features like "Muscle Mapping, Power Gauge, and Pulse."
According to (now removed) Xbox.com page discovered by NeoGAF, Xbox Fitness will require a separate subscription in addition to an Xbox Live Gold membership. However, Microsoft is planning a free trial period. Gold members will be able to get "unlimited access" to Xbox Fitness until November 2014. How much it will cost after the trial period is over was not discovered.