Avoiding contact is the easiest way to avoid concussions. If you're not the type to shy away from a hit, at least wear a Prevent Smart Mouthguard. It uses a series of four accelerometers to monitor the number, direction, and force of impacts, setting off a warning in a coach's app and lighting up an onboard LED if the force is too great. Its flexible circuit board is held in place in the mouth with a proprietary thermoplastic polymer, and also contains light and proximity sensors, wireless charging components, and Bluetooth. Available in boil and bite or custom fabricated versions.