Don't judge a shoe by its covering
Running with no shoes on, the theory goes, makes for faster reflexes, a stronger body, and a healthier mind. Fans of the style claim that even the lightest-weight shoes are unnatural and actually weaken your feet over the long term, causing more injuries than they prevent because they alter our natural biomechanics. All that support in the heel? It just encourages a disproportionately heavy heel strike. A thick outsole? It mutes our proprioception—our subconscious sense of spatial orientation.