Right after the birth of our first child, I was. Blogging mother runners I was friends with coined the term 'pregnancy blood doping' to account for our super speeds. Because blood volumes increase by more than 40% during pregnancy (in turn, more oxygen can get to your muscles), it made sense that I was posting race times five to 10 minutes faster than anything I did pre-pregnancy. But I also ate better while breastfeeding
and had mommy guilt hanging over my head during every workout, so I’d push through sets faster than usual. However, five years later I’m slower — but that’s because my goals have changed. I’m no longer interested in running fast — I want to run longer — and I haven’t figured out out to run fast and long.