title: Read user's Google Fit activities through REST calls
body: <p>I have seen that a Fitness History API already exists for android but i can't find anything similar for REST services. All i want to do is get the fitness activities of an authorized user's account. For example, i would like to get all the "walking" activities that he did in a specific day or period. Is there a simple way of doing this from a web app, since the documentation can be confusing?</p>