For all that we know about the swing today, the brain remains an enigma. To prepare for the Ryder Cup, players have tried a variety of methods—measuring brain waves, skin temperature, heart rate and using cold exposure—and many believe that if they can use technology to optimize the way the brain works, it could provide the edge that delivers in high-pressure moments.

Golf Digest Senior Game Improvement Editor Luke Kerr-Dineen breaks down the different methods that the world’s best are using to prepare for this week’s Ryder Cup.