An apparatus for use as at least part of a sole of a shoe or as at least part of an insole of the shoe, the apparatus comprises a fixed section that provides a positioning of a big toe area at a lower position than a heel area and/or at a lower position than an outer edge area, and an adjustable section associated with the fixed section, wherein the adjustable section adjusts at least one of the lower positioning of the big toe area with respect to the heel area and the lower positioning of the big toe area with respect to the outer edge area.