There is no available information about a nonprofit organization named "Care Fitness Inc" with the EIN 850831357 in the provided search results. Therefore, it is not possible to write a detailed article about such an organization at this time.

[1] https://www.causeofeffect.fitness [2] https://ability360.org [3] https://www.ymca.org [4] https://www.nyccare.nyc/community-based-organization/ [5] https://calnonprofits.org/resources/how-to-start-a-california-nonprofit/