That’s 13.5 percent of the bones in your whole body! Your feet also have hundreds of thousands of nerves—which helps explain why more than 90 percent of women who wear high heels suffer from pain, soreness and fatigue. Every inch of heel height can put another 25 percent of your body weight onto your forefoot. So, if you’re rocking 4-inch heels, you’re effectively walking on your tippy toes all day.  

MORE: 5 Things You Didn’t Know About High Heels