Xbox Fitness features an "extensive" library of interactive programs from fitness routines like P90X and Insanity, as well as Jillian Michaels and Tracy Anderson. Xbox Fitness will be free for Xbox Live Gold members through December 2014.

Using Kinect, Xbox Fitness can read a player's heart rate without using a monitor, Microsoft said. The technology can also detect and determine which muscles are "most engaged" by measuring power, force, and transfer of weight within the body. The quality of performance is also measured, tracking balance, tempo, and form, Microsoft said.

The Xbox Fitness service will also deliver personalized program recommendations determined by past performance and workout history. A "variety" of workouts will be available, Microsoft said, ranging from 10 to 60 minutes in length.

Xbox Fitness also boasts a social component, allowing users to participate in challenges and then post results for friends and the community at large to try to match.

An Xbox Fitness Pass is included with Xbox Live Gold membership through the end of the year. Pricing for an Xbox Fitness Pass after the introductory period ends was not announced.

Check out the video below for more on Xbox Fitness. The Xbox One .