Great work! There is nothing wrong with your image in general and I agree with the previous posts about those improvements. I think yorgasor's
edit is a good example of what I would have done. IMO, you did great. Shooting sports or anything else in the heat of the moment is tough and we are blessed with the ability to adjust things later in post. yorgasor
took down the brightness/highlights just a bit which is what I prefer, a face that is a bit warmer without the shimmer and moving the runner over the side a bit. But that is personal taste!
Since I shoot outside a lot, I learned a long time ago to buy some warm high quality thin gloves and even a second pair of fingerless gloves to go over those if needed. Obviously it's worth it if you are out for longer than 30 minutes.
If you (or anyone else!) care to look at similar run photos I shot, go here... http://rustythegeek.zenfolio.com/run4hills
I am by no means a pro and I don't shoot "sports" shots that often. You'll see where I tried to mix candid personal shots of the people with the action shots of the runners and then shots of the awards ceremony afterwards. (Yeah, I got a little carried away with the cute little girls at the end.) I shot everything with a 5D3+24-70f/2.8 and a 6D+70-200f/2.8 combo. The running shots where taken sitting from a stool just before the finish line. Since these runs were all on asphalt streets through neighborhoods and commercial buildings, there wasn't really a good spot along the route with a great background. I hate that stupid sign pole in several shots. Couldn't be avoided. Grrr.
Before the 2013 run, I posted a request here for advice. There were a lot of good suggestions.http://www.canonrumors.com/forum/index.php?topic=17253.msg319473#msg319473
One thing I took away that I never forgot was to try and catch runners as they are leaping, not landing in their pace. In other words, catch them while their body is going up and in mid air. This way, their face, chest, clothes, hair, etc are all uplifted or more natural, not sagging and being pulled down from landing on the ground with their other foot.