| 摘要 |
Athletic footwear has an upper and sole. The sole has heel and midfoot regions and metatarsel and toe regions which include a foundation layer of semi-flexible material attached to the upper and defining a plurality of stretch chambers, a stretch layer attached to the foundation layer and having portions of elastic stretchable material underlying the stretch chambers of the foundation layer, and a thrustor layer attached to the stretch layer and having portions of stiff material underlying and aligned with the stretch chambers of the foundation layer. Whereas components of the heel and midfoot regions of the heel provide temporary storage and retrieval of applied energy at central and peripheral sites underlying the heel and midfoot of the wearer's foot, components of the metatarsel and toe regions of the sole provide temporary storage and retrieval of applied energy at independent sites underlying the individual metatarsals and toes of the wearer's foot.
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