I suffered some nausea about the last 1-2k from the end of The Croydon 10k, which put me off from trying a good sprint at the end in case I did actually vomit. I know runners sprint regardless of vomiting, but I'm not going to make myself ill just to gain some time.
So, have been trying to work out why I would feel like this, and the only thing I can put my finger on is because I took on some water offered at the water station 6-7k in. I didn't feel exactly thirsty as wasn't an exceptionally warm morning, and felt fine. I took it just to refresh the mouth and drank almost a beaker full. Maybe I should avoid taking (forcing down)water if I don't really need it and will watch this in future. Has anyone else had this problem when taking water?😊