The Nike+ Android SDK by Nike allows to communicate with the API interface to implement fitness monitoring features into applications. Available data to access athlete's activities. Resources include SDK configuration with Nike framework and authentication with OAuth 2.0. Contact Nike to obtain full API access as a partner.
Apple today released the Health Records API to developers and researchers alike tap into the growing amount of data generated by and stored on mobile devices. The end goal is to let consumers manage their medications, diseases, nutrition -- all of which can be viewed and managed on their iPhone.