Is there any such thing? I'm working my way to 10k and managed 8k along the river today. Felt great and as though I had the legs to take me to 10k, but didn't want to push it.
When I reached 8k I stopped and had a little walk but started to get a bit of a cough. It's happened a couple of times. I don't have asthma, the 8k took 58min so I wasn't super speedy or anything.
Anyone had similar?