<a href="http://www.mapmyfitness.com/">MapMyFitness</a> is a veteran of the online health and fitness space, with the first iteration of its website appearing back in the summer of 2005. Since then, t
<img src="https://techcrunch.com/wp-content/uploads/2011/06/screen-shot-2011-06-23-at-7-07-15-pm.png" /> You may have heard about the social graph and the interest graph, but what about the health gra