To measure impact, the team is combining two technologies to study how the head reacts to collisions: The helmet-installed Head Impact Telemetry System (HITS) by Riddell and X2 Biosystems' newer X Patch, which is worn on the skin right on the skin behind the ear. The two sets of data work together to more accurately track how much the head moves during a hit. The team is studying ice hockey collisions as well, and they're also using the setup to study something which hasn't yet been explored: how and if neck strength can help protect the head from injury.