Do you get nauseous towards the end of a run? If so, how can you avoid it? I do find when I get exhausted towards the end of a run I want to throw up. I usually run on an empty stomach and just a glass of water as I am afraid of needing a pit stop. This morning I had half a dz dates just to have energy but by 4.2k I started feeling funny. I think the sun or heat may have something to do with it. Any interesting idea?