Which innovative product design feature was banned by the International Olympic Committee after Adidas introduced it in their track shoes for the 2008 Beijing Olympics?

The sports industry has always been at the forefront of product design innovation, especially when it comes to performance footwear. Olympic athletes rely on cutting-edge technology to gain competitive advantages, and sports brands invest millions in research and development to create breakthrough products. This trivia question tests your knowledge about a significant product design milestone that changed the face of Olympic track and field competition.

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Carbon fiber plates
ProPlate energy-return springs
Aerodynamic heel cups
Self-adjusting adaptive cushioning