Running a 5K to 10K?

How accurate a gauge can your 5K time be in terms of what you can run for 10K? I think it's a tough question to ask because it is a lot further because it's double the distance, but it's not. It just depends if you're effectively training under distance and then 5K is actually racing over distance as well. Chris: How do you use a sort of this mental side of it to kind of get to the finish line with those events? Cause sometimes it's a bit, the shorter it is, the kind of less time you have to hold on really.