Naked Science Forum
Life Sciences => Physiology & Medicine => Topic started by: JP on 22/05/2009 20:44:03
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I'm not a morning person at all. I'm not much use until I have my morning coffee or tea. However, when my schedule requires it, I sometimes go running in the morning. I've noticed that when I do so, I get a slight flickering in the center of my vision in both eyes. It seems kind of like the flickering you can see from a fluorescent light that's going bad. It's hardly noticeable with my eyes open, but it's quite distinct if I close my eyes. I've never had this effect when running at other times of day, or on mornings when I don't exercise. I'm not particularly worried about it, but I'm curious what might cause it. Any ideas?
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Possibly low blood sugar (hypoglycemia) if this only occurs on your morning run: insufficient carbohydrate in your breakfast to fuel a run.
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Yes, I have noticed this after an intense bike ride in the morning.