Don’t drastically diet
“Young, active women can actually harm their bones by excessive exercise without meeting their daily energy needs,” says Dr. Bruene. Translation: if you exercise too much and eat too little, your bone density can decrease.
That’s because running on empty often halts menstrual cycles, lowering the estrogen level in the body, she explains. Estrogen is a pro-bone hormone. Staying active is great, but make sure you’re eating enough, too.