"Smart Soles" Adjust for Running, Walking
The sole operates by filling bladders with an electrically-activated liquid within milliseconds when extra cushioning or support is needed. The liquid can also firm up when necessary.
Such a shoe could be controlled manually or even through a wireless device. Or, the shoe could be self-adjusting, sensing different movements and wear conditions. Currently, the project is in the patent stage, with no word on when a product will reach the market.
Sources: NewScientist, twenty1f