Fitness and social media

I've noticed since taking up my fitness hobby that my social media accounts have polarized into different areas. Facebook has always been my 'friends only' account. Everything about my personal profile is private, and it's the only place I make any substantial posts about family. I use it mostly to chat with 'real life' friends who live far away, and to keep in touch with the American side of my family. I do however have two Facebook 'pages' related to each of my blogs, which I use for sharing posts with friends and blog readers alike, but I always post under the blog alias rather than my personal profile. Twitter on the other hand is very much my academic persona. I use it to network with other archaeologists and related academics, and to keep track of different university departments' news, to follow conferences through live tweeting etc. I also manage several other Twitter accounts for academic related bodies, where it's used for sharing the latest research papers and news. Instagram was not a site that I used a great deal. I did have a profile but never really posted that much. Maybe because I shared all my family photos on Facebook and didn't want to make them public. Getting involved in body building and fitness, my Instagram account has firmly become the place where I follow other like minded fitness folk, and my news feed has turned into a stream of flexing gym pictures, food, and motivational pics. It probably looks quite odd to those who are not into the whole gym thing! I do follow a few friends on there as well, but most of the stuff I post myself is now related to my super hero training efforts, or nutrition and meals. It has a very different feel to it than my other profiles. It's funny how each of the different accounts has its own distinct focus, but they're all a part of me, just a different emphasis. Does anyone else separate their social media in this way? I find it interesting, though perhaps not surprising, that Instagram has such a focus in the fitness industry. I guess for a sport/hobby that has a lot of emphasis on physical appearance, it makes sense that this would be the case.