english: We have an arch in our foot that acts like a spring, short toes that are better for pushing off than for grasping tree limbs, and when we run, we can turn our torso and our shoulders like this while keeping our heads straight.
non_english: Luk stopala nam služi kao opruga, kratki prsti na nogama su bolji za odskok nego za hvatanje za grane, a dok trčimo, možemo ovako da okrećemo torzo i ramena bez pomeranja glave.