Step Lively

Adidas 1 Sneaker
Inventor: Adidas
Availability: March 2005, $250
To Learn More: adidas.com

Computers in your shoes? Believe it. A sensor in the new Adidas 1 sneakers measures with each step how much compression you put on the heels of the shoes. Microprocessor-controlled cushioning then adjusts the heels' stiffness so they become more rigid on dirt trails, for example, and softer on pavement or when you're walking. In addition, you can set comfort levels with buttons on the shoes. The lithium-ion battery that fuels the system lasts about 100 hours.

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