A system, method, and apparatus for an athlete to variably control the flexibility and stiffness parameters of a piece of athletic equipment to select a desired performance characteristic of the equipment based on the stiffness parameter. According to certain embodiments discussed herein, an item of sporting equipment may be embedded, impregnated, lined, or encased using nitinol components, wherein the nitinol components may themselves be treated using a specific method in order to achieve the desired transformation results, as described below.

A limb for an archery bow is provided. The limb includes an outer elongate member, an inner elongate member, and a core member. The outer elongate member is formed of a first material. The inner elongate member is formed of a second material. The core member is formed of a third material and is sandwiched between the outer elongate member and the inner elongate member. The core member is coupled with at least a portion of the outer elongate member and the inner elongate member. The outer elongate member and the inner elongate member are configured to move relative to each other when the limb is bent. The first material and the second material are each stiffer than the third material.

A system, method, and apparatus for an athlete to variably control the flexibility and stiffness parameters of a piece of athletic equipment to select a desired performance characteristic of the equipment based on the stiffness parameter. According to certain embodiments discussed herein, an item of sporting equipment may be embedded, impregnated, lined, or encased using nitinol components, wherein the nitinol components may themselves be treated using a specific method in order to achieve the desired transformation results, as described below.

A limb for an archery bow is provided. The limb includes an outer elongate member, an inner elongate member, and a core member. The outer elongate member is formed of a first material. The inner elongate member is formed of a second material. The core member is formed of a third material and is sandwiched between the outer elongate member and the inner elongate member. The core member is coupled with at least a portion of the outer elongate member and the inner elongate member. The outer elongate member and the inner elongate member are configured to move relative to each other when the limb is bent. The first material and the second material are each stiffer than the third material.

A limb for an archery bow is provided. The limb includes an outer elongate member, an inner elongate member, and a core member. The outer elongate member is formed of a first material and includes an interior surface and an exterior surface. The inner elongate member is formed of a second material and includes an interior surface and an exterior surface. The core member is formed of a third material and is sandwiched between the outer elongate member and the inner elongate member. The core member is coupled with at least a portion of each of the interior surfaces of the outer elongate member and the inner elongate member. The outer elongate member and the inner elongate member are configured to move relative to each other when the limb is bent. The first material and the second material are each stiffer than the third material.

A system, method, and apparatus for an athlete to variably control the flexibility and stiffness parameters of a piece of athletic equipment to select a desired performance characteristic of the equipment based on the stiffness parameter. According to certain embodiments discussed herein, an item of sporting equipment may be embedded, impregnated, lined, or encased using nitinol components, wherein the nitinol components may themselves be treated using a specific method in order to achieve the desired transformation results, as described below.

A limb for an archery bow is provided. The limb includes an outer elongate member, an inner elongate member, and a core member. The outer elongate member is formed of a first material and includes an interior surface and an exterior surface. The inner elongate member is formed of a second material and includes an interior surface and an exterior surface. The core member is formed of a third material and is sandwiched between the outer elongate member and the inner elongate member. The core member is coupled with at least a portion of each of the interior surfaces of the outer elongate member and the inner elongate member. The outer elongate member and the inner elongate member are configured to move relative to each other when the limb is bent. The first material and the second material are each stiffer than the third material.

A system, method, and apparatus for an athlete to variably control the flexibility and stiffness parameters of a piece of athletic equipment to select a desired performance characteristic of the equipment based on the stiffness parameter. According to certain embodiments discussed herein, an item of sporting equipment may be embedded, impregnated, lined, or encased using nitinol components, wherein the nitinol components may themselves be treated using a specific method in order to achieve the desired transformation results, as described below.