I have never paid too much attention to the technical aspects of training so forgive my ignorance on vo2. I had a stress test last summer and just realized that the results that I got included my vo2 measurement. I wonder if there is a calculator that would predict what race times I should be able to achieve based on vo2. Also, at the time, I had just started training for a half marathon so my distance was increasing. Will vo2 change much with training?