According to the invention, a shoe having at least one base spring
element, which is arranged between appendages at a heel zone of the shoe
and at a shaft zone taking support at the front edge of the shin bone and
which stretches in the course of an ambulation phase, characterized in
that a tensioning assembly moves the appendage of the base spring element
at the heel zone away from the appendage at the shaft zone upon planting
of the shoe, for stretching of the base spring element.