Lab coats on, ladies! It’s time to learn the science of footwear.
In a nutshell, the windlass mechanism (a widely researched and taught biomechanical principle) is responsible for raising your foot’s arch when your weight is loaded onto your big toe, creating a rigid lever to propel your foot forwards.
When you wear heels higher than 4cm (1.5 inches), most of your weight is distributed through the front of your foot, (like if you were doing a calf raise exercise) and the windlass mechanism is activated.
The windlass mechanism causes your foot to roll outwards (sickling, in ballet terms). This means that your leg muscles have to work harder to stabilise your ankle and maintain equilibrium through your foot. Here comes the burn! The higher your heels, the harder your muscles have to work and the more quickly they tire.
Once the muscles around your calves, ankles, and feet begin to fatigue, your toes will start to grip your shoes for stability. This is when you enter the danger zone for ankle injuries and long-term deformities.