Which technological feature was first successfully implemented in mass-market smart running shoes?

The sporting goods industry has seen remarkable technological advancements in recent years, particularly in 'smart' athletic footwear. These high-tech shoes combine traditional performance elements with cutting-edge technology to enhance athletic performance and provide valuable data. Test your knowledge about this growing product category that's changing how athletes train and compete.

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GPS tracking with real-time location sharing
Pressure sensors measuring stride impact and foot placement
Automatic lacing systems that adjust tension during activity
Temperature-regulating soles that maintain optimal foot climate