The elastically deformable reinforcement insert (2) elastically deforms the foot bed (1) into a correcting position in the event of partial contact between the tread face of the shoe and the ground. The reinforcement insert has in the rear foot area a correction tongue (4) which engages on the outside on the foot and is raised up at the sides. On ground contact in the front foot area the tongue adjoins with pretension from the outside against the rear foot area.
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