Anarcho-Capitalist runner wrote:It is a scientific fact that if your body fat drops to low it dramatically increases one chances of fractures, because it messes up your hormones. If your body fat drops to low you can't produce enough estrogen which is crucial to bone health.
This isn’t true (and for a man it’s testosterone, not estrogen). Body fat has nothing to do with it. It’s energy balance and availability. You have to provide enough energy to counter the expenditure. Plenty of very thin women still ovulate because they eat very well to maintain energy and hormonal balance. If you eat a lot and frequently it also keeps your metabolism working (hence, get thin). If you don’t eat well your hormonal milieu gets thrown off and the first thing to go is your reproductive system. If you can’t provide enough energy for yourself you certainly can’t provide for a fetus. Your bones are a tertiary effect of the lower estrogen or testosterone in men.