The small square cube sewn into the back of NFL practice football jerseys is a fascinating piece of modern sports technology. This cube is a part of a GPS tracking system used by teams to monitor players' performance and physical metrics during practice sessions. By embedding this technology into the jerseys, teams can gather valuable data such as speed, distance covered, acceleration, and even heart rate. This information helps coaches and sports scientists optimize training, prevent injuries, and improve overall team performance.

The GPS tracker works by communicating with satellites to pinpoint the player's location on the field. It records every movement, providing a detailed map of their activity during practice. This data is then analyzed to understand each player's workload and condition, ensuring that training regimens are tailored to their individual needs.

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