Shoe with torsion assembly

A torsion assembly for a shoe, the torsion assembly comprising:

• a torsion member configured to be coupled to the shoe in a medial-lateral orientation and having a medial end and a lateral end;
• a medial linkage including a medial arm and a medial post, the medial arm having a first end connected to the medial end of the torsion member, the medial post having a proximal end rotatably connected to a second end of the medial arm and a distal end configured to be connected to the shoe;
• and
• a lateral linkage including a lateral arm and a lateral post, the lateral arm having a first end connected to the lateral end of the torsion member, the lateral post having a proximal end rotatably connected to a second end of the lateral arm and a distal end configured to be connected to the shoe,
• wherein movement of the medial linkage or the lateral linkage away from an equilibrium position twists the torsion member in an initial rotational direction, the torsion member providing a resisting force in an opposite rotational direction to restore the medial linkage and the lateral linkage toward the equilibrium position and provide stability for the shoe.

A torsion assembly for a shoe, the torsion assembly comprising:

• a torsion member configured to be coupled to the shoe in a medial-lateral orientation and having a medial end and a lateral end;
• a medial linkage including a medial arm and a medial post, the medial arm having a first end connected to the medial end of the torsion member, the medial post having a proximal end rotatably connected to a second end of the medial arm and a distal end configured to be connected to the shoe;
• and
• a lateral linkage including a lateral arm and a lateral post, the lateral arm having a first end connected to the lateral end of the torsion member, the lateral post having a proximal end rotatably connected to a second end of the lateral arm and a distal end configured to be connected to the shoe,
• wherein movement of the medial linkage or the lateral linkage away from an equilibrium position twists the torsion member in a rotational direction, the torsion member providing an augmenting force in the rotational direction to bias the medial linkage and the lateral linkage away from the equilibrium position and provide asymmetric stability of the shoe.