Iron woman! Women, exercise, and iron
I've struggled with problems with running out of energy on hills for years, despite doing hill intervals, using a heart-rate monitor to train in the correct zones, etc. But I think I've found the answer.
This year, when I was totally exhausted for weeks at the end of the cross-country ski season (my favorite sport), I went to see my doctor. Everything was normal except for low blood iron. Not anemia, just low iron. This has been a regular problem off and on, and I hadn't taken low iron or even mild anemia too seriously.
But this time I did some web research and found reliable-seeming sources that stated that heavy exercise can deplete women's iron reserves, low blood iron can adversely affect athletic performance (duh, I should have known this one!), and coffee can interfere with iron absorption. It all suddenly fit together for this coffeeholic lousy hill-climbing tired at the end of every xc ski season woman.
I have decreased my coffee consumption, and started taking iron supplements daily with vitamin C (and a couple hours after or before any coffee or calcium). And, I'm doing great! Hills I used to suffer on are getting much easier; I don't feel like I'm going to puke, pass out, and have my thighs burn off. I rode up a challenging hill that I've ridden before today, at 6,500 feet altitude, and I was fine!!!!
My doctor has pooh-poohed my web findings. Has anybody else had similar experiences, or is anyone a health-care professional who can verify what I found on the web and have experienced? (I think it may be time to find a doctor who will take my input more seriously, too.) Any further info re iron and exercise would be appreciated.