The new adidas uses a tiny magnetic sensor beneath the heel to monitor changes in impact, speed and ground conditions 1,000 times per second, a microprocessor chip in the arch of the shoe reads the information and decides the adjustments to send to a tiny motor to adjust cushioning to meet performance needs.
A tiny magnet is installed in the outsole under the heel, and a magnetic sensor is positioned above it. As the runner's foot hits the ground, the sensor measures the compression. It relays the information to a 20 MHz microprocessor housed under the arch. The microprocessor compares that information to the optimum cushioning that's already programmed into its electronic innards.It then sends orders to a tiny electric motor connected to a cable. The cable either lengthens or shortens to limit or expand the amount of compression, according to the runner's needs. The cushioning also can be manually adjusted.
The whole thing's powered by a replaceable lithium battery good for about 100 hours.