I find as I am getting older I am much more fatigued during my period. It is like I am just a slug. During other times I can sustain a higher HR but not during my period. It also seems I dehydrate easier and have a more sensitive stomach so while most of the time nutrition is not as relevant for me it is super relevant during that week or so. I also have a lot of issues with being more prone to chafing, not a fan of chamois butter but have to use it during that time.



I also wonder if I'm getting lower on iron some months than others. I did get full blown anemia last August after having lost some weight during the previous 6 months. I was riding better than ever, my period hit and boom ... my riding sucked! It took a long time to get over it and get back into training. (A coach had told me to eat red meat! He was way more into natural foods than supplements. And told me it's fairly common for women losing weight and training a lot to get anemia.) So maybe I'm more susceptible to low iron levels, especially at that time of the month, and should be taking iron during my cycle ... so I can cycle! Haha! I crack me up. After I got anemia and my training basically came to a halt, I also started letting myself eat more and my weight slowly came back. So now I'm back in weight loss mode ... though I feel I've had plenty of foods with iron, including red meat and eggs ... but maybe I need to up my iron even during my period.
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. Plus, what I sweated out. At that time, my body weight at 5'5" was 120lbs, so basically 4%+ total loss. Significant. 