[Scratch]

Great time. You got some speed.

Yeah, 5K races can do that to you. You're basically running up at the redline between aerobic and anaerobic, so the liver starts dumping glucose and I suspect sometimes stress hormones promote insulin resistance.

It's unlikely you'll get a spike like that in the marathon though. I'd also guess if you try to run for any prolonged period of time and it got that high, you would feel it in your legs.