Abstract: An article of footwear includes an upper, a midsole positioned beneath the upper; and a forward displacement assembly positioned within the midsole. The forward displacement assembly may include a biasing member, an actuator element operably connected to the biasing member, and an extension assembly positioned in a forefoot region of the midsole and operably connected to the actuator element. The extension assembly may include a movable outsole member.

Abstract: A system for analyzing athletic activity is usable with an article of footwear including a sensor system with a plurality of force sensors configured to sense force exerted by a user's foot, an electronic module contained within the article of footwear, and a plurality of sensor leads connecting the sensors to the electronic module, wherein the electronic module collects data based on force input from the sensors and transmits the data. The system also includes an electronic device in communication with the electronic module. The electronic device includes a processor that receives the data from the electronic module, compares the data to a footstrike template corresponding to a desired footstrike pattern to determine whether a deviation from the footstrike template exists, and generates an indication to the user when the deviation from the desired footstrike pattern is determined to exist, which may also include a degree of such deviation.

Abstract: An article of footwear includes an upper and a sole assembly that is operably coupled to the upper. The sole assembly includes a first portion and a second portion that are separated by a groove. Also, the article of footwear includes a biasing structure that is elongate and nonextendable. The biasing structure is operably coupled to the sole assembly to bias the first and second portions of the sole assembly generally toward each other.

Abstract: An article of footwear includes an upper and a sole assembly that is operably coupled to the upper. The sole assembly includes a first portion and a second portion that are separated by a groove. Also, the article of footwear includes a biasing structure that is elongate and nonextendable. The biasing structure is operably coupled to the sole assembly to bias the first and second portions of the sole assembly generally toward each other.

Abstract: A composite material and method are described wherein melted waste, chemically unmodified PET material and fly ash particles are mixed in a vessel to disperse fly ash particles in the melted PET material. The resulting mixture then is cooled to solidify the melted PET material to form a composite material having a matrix comprising PET and dispersoids distributed in the matrix and comprising fly ash particles.