Shoes and/or shoe elements facilitate natural foot motion and/or reduce forces tending to fight natural foot motion. In at least some such structures, a wearer's heel is secured to the hindfoot region of a shoe (e.g., by a strap system) in a manner that permits heel/forefoot rotation and that allows the lower leg to remain straight. In other structures, a shoe can include a heel supporting component that is separate from a midsole component, and this heel supporting component can move toward the lateral side and/or medial side of the shoe along an interface between the heel supporting component and the midsole component. Other suitable shoe and shoe component structures also are described.

A sole assembly for an article of footwear having a midsole defining a sidewall channel in the forefoot and a sidewall channel in the heel. The forefoot and heel channels terminate at the arch. The sole assembly includes a plate disposed below the midsole. The plate may include an arch portion, forefoot legs extending along the medial and lateral sides of the forefoot and heel legs extending along the medial and lateral sides of the heel. The medial forefoot leg may extend almost the full length of the forefoot. The lateral forefoot leg may extend about half-way through the forefoot. The lateral heel leg may extend almost the full length of the heel. The medial heel leg may extend about half-way through the heel. The sole assembly may include an outsole with slots in the heel and forefoot. The slots may terminate short of the peripheral edge.

The invention relates to a shoe, in particular a running shoe, comprising: an outsole, which has a predetermined ball line (37), which extends from an inner ball point to an outer ball point, and a ball rocker (38), which is offset rearward toward the heel end (26) in relation to the ball line (37) by an average ball rocker distance (41); an upper; and an insole, which is arranged above the outsole and which is adhesively bonded, together with an edge of the upper, to a top side of the outsole.

A sole structure for an article of footwear having an upper includes an outsole, a plate disposed between the outsole and the upper, and a first cushioning layer. The plate includes an anterior-most point disposed in a forefoot region of the sole structure, a posterior-most point disposed closer to a heel region of the sole structure than the anterior-most point, and a concave portion extending between the anterior-most point and the posterior-most point. The concave portion includes a constant radius of curvature from the anterior-most point to a metarsophalangeal (MTP) point of the sole structure. The MTP point opposes the MTP joint of a foot during use. The first cushioning layer is disposed between the concave portion and the upper.

A plate for an article of footwear having a sole structure includes an anterior-most point disposed in a forefoot region of the sole structure, a posterior-most point disposed closer to a heel region of the sole structure than the anterior-most point, and a concave portion extending between the anterior-most point and the posterior-most point. The concave portion includes a constant radius of curvature from the anterior-most point to a metarsophalangeal (MTP) point of the sole structure. The MTP point opposes the MTP joint of a foot during use.

A sole assembly for an article of footwear having a midsole defining a sidewall channel in the forefoot and a sidewall channel in the heel. The forefoot and heel channels terminate at the arch. The sole assembly includes a plate disposed below the midsole. The plate may include an arch portion, forefoot legs extending along the medial and lateral sides of the forefoot and heel legs extending along the medial and lateral sides of the heel. The medial forefoot leg may extend almost the full length of the forefoot. The lateral forefoot leg may extend about half-way through the forefoot. The lateral heel leg may extend almost the full length of the heel. The medial heel leg may extend about half-way through the heel. The sole assembly may include an outsole with slots in the heel and forefoot. The slots may terminate short of the peripheral edge.

A sole structure for an article of footwear comprises a first plate and a second plate. The first plate overlies at least a portion of a forefoot region of the second plate. The first plate and the second plate are fixed to one another rearward of the forefoot region. The first plate is configured to slide longitudinally relative to the forefoot region of the second plate in a first portion of a flexion range during dorsiflexion of the sole structure, and to interfere with the second plate during a second portion of the flexion range that includes flex angles greater than in the first portion of the flexion range.

A sole assembly for an article of footwear comprises a sole plate with a foot-facing surface with a recess disposed in the foot-facing surface. An insert plate is disposed in the recess. A length of the insert plate between anterior and posterior ends of the insert plate is less than a length of the recess. The insert plate flexes free of compressive loading by the sole plate when a forefoot portion of the sole assembly is dorsiflexed in a first portion of a flexion range, and operatively engages with the sole plate when the forefoot portion is dorsiflexed in a second portion of the flexion range that includes flex angles greater than in the first portion of the flexion range. The sole assembly is dorsiflexed, for example, when the forefoot portion is flexed in accordance with toes bending toward the top of the foot.

A sole structure for an article of footwear comprises a sole plate that has a forefoot portion with a foot-facing surface. The sole plate has at least one groove extending at least partially transversely in the foot-facing surface. The at least one groove is open when the sole structure is dorsiflexed in a first portion of a flexion range, and closed when the sole structure is dorsiflexed in a second portion of the flexion range that includes flex angles greater than in the first portion of the flexion range.

A sole structure for an article of footwear comprises a sole plate that has a forefoot region, and a stiffness enhancing assembly disposed in the forefoot region of the sole plate. The stiffness enhancing assembly further comprises a compression member disposed at a foot-facing side of the sole plate, and a tensile member disposed at an opposite side of the sole plate from the compression member. The tensile member is spaced apart from the compression member by a first distance in a first portion of a flexion range during dorsiflexion of the sole structure, and interferes with the compression member during a second portion of the flexion range that includes flex angles greater than in the first portion of the flexion range.