• In order to sashay around in heels, your spine needs to sway unnaturally, a process that stresses your lumbar erector spinae muscle. Result: sore lower back.
• As with your other body parts, your back needs a break. If you wear high pumps one day, don cushioned flats the next. Or save your spikes for special nights out—and never walk around in them for longer than a few hours at a time.