Ski boots and other shoes and method for improved balance

A method of tailoring a shoe for a foot of a person, the method comprising positioning the foot to rest two surfaces interconnected by an intermediate structure, so that the heel of the foot rests on a first of the surfaces and the forefoot of the foot rests on a second of the surfaces with the foot arch extending between said first and second surfaces and over said intermediate structure, for each of heights of the first surface relative to the second surface, the intermediate structure configured to selectively fix the relative positions of the first and second surfaces, incrementally raising one of the first and second surfaces relative to an other of the first and second surfaces thereby positioning the foot in a range of incremental heel to forefoot height differential positions for measurement outside of the shoe of heel to forefoot height differential, testing for mobility and/or flexion and/or balance of the foot at each of the height differential positions by having the person place the foot onto the surfaces at each of the height differential positions until the person reports one of the height differential positions at which the person feels that the person has the best balance and/or mobility and/or flexion, selecting said one of the height differential positions to be the incremental heel to forefoot height differential position which is determined for the foot by the testing to be optimum for mobility and/or flexion and/or balance, altering the sole of the shoe to have a heel to forefoot height differential along the foot-engaging surface of the sole which matches the selected heel to forefoot height differential position which is determined for the foot by the testing to be optimum for mobility and/or flexion and/or balance, and forming an insole for the shoe which conforms to the altered sole.