I could tell that Blake was working, and I'd seen her have a good kick at the end of some other races. I'd better just go. M.D. Women and men alike are living at a more rapid and complex pace than ever before. Women are prone to fatigue from anemia. This is not the case for men, who rarely run low on iron.
Fatigue has many faces.
If you wake up tired, that's not anemia. Maybe you're sleep-deprived, or depressed. If you wake up refreshed but later need a nap, that's not anemia, either. Anemia causes fatigue only when you exert yourself. And the milder the anemia, the more exertion it takes.