You may not know this but if you have one of the newer Garmin devices that estimates your VO2Max you also have a race predictor. Apparently, it uses your VO2 Max with your gender and age to predict how you will do at different races. I am currently training for a marathon so I thought it might be interesting to see how accurate this function is. Below is what my
crystal ball Garmin 920 is predicting as of today, September 15, 2015:
This is based off my estimated VO2 Max of 46. It will be interesting to see what I actually run in November. The watch has captured a lot of running data so you would think it could be pretty accurate. Do I think I can run 3:36 marathon right now? No. But it is nice to know my watch thinks I can!