Look, the science says intense training increases red blood cell turnover and foot-strike hemolysis, and menstruation is a direct blood loss—both drain iron stores. Coaches should push for a ferritin level above 50 ng/mL for optimal performance, not just the lab's "normal" of 12. My own experience? I ran national-level for years with "normal" ferritin but constant fatigue; only when a new coach insisted on aiming for 70 did my times finally improved. So much for textbook ranges, babu.
#marathon#road-running
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