How battlefield technology is being used to track concussion on the sports field

The Linx IAS headband sensor monitors head trauma for American footballers and boxers, aiming to reduce the 300,000 concussions in US high-school sports

In April this year, a US federal judge gave the final approval to a $900m class-action lawsuit settlement between the National Football League and thousands of former players.

More than 5,000 retired players represented by the case complained that the league hid the risks of multiple concussions in order to keep players on the pitch. Each will now be awarded up to $5m (3.23m) for any serious medical conditions associated with repeated head trauma.