Importance

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Abstract

A shoe and shoe sole for accommodating forefoot strike activities such as aerobics, and forefoot strike tendencies of runners and the like, to forestall stress features, tendonitis and muscle tears, by incorporating a special forefoot pad in the midsole. The pad has a forward chamber and a rearward chamber, separated by an internal wall with restricted orifices therein, the forward chamber being larger and extending curvilinearly beneath the five metatarsal heads of the foot, and the rearward chamber being smaller and extending behind the second, third and fourth metatarsal heads in the arch region of the foot. Impact compression by the metatarsal heads on the forward chamber causes controlled viscous liquid flow into the rearward chamber to absorb impact force, and such that the amount of liquid in the rearward chamber is temporarily greater than its at rest volume, causing the walls of that chamber to bulge and form a temporary arch support. Release of force on the forward chamber results in the resilient flexible bulging walls of the rearward chamber forcing liquid back to the forward chamber.

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First Claim