The RunKeeper Health Graph Node.js SDK by Mark Soper communicates with the API to implement running features into applications. Guides available to create a client by registering a new application, use API methods by accessing with token, and extend a project by adding support for new calls.
Life Fitness stands as the first fitness equipment manufacturer to open its products to the developer community via APIs. Life Fitness created LFopen to encourage app development around Life Fitness equipment. Currently, APIs exist to enable web based applications or mobile applications that pull data from machines.