Biofeedback is an emerging field of study that links psychological functions with physiological and neurological metrics. That might sound like a whole bunch of jargon, but it’s actually a pretty simple concept. When you’re stressed, for example, your heart rate and the brain waves you emit are a lot different than when you’re relaxed. What biofeedback does is allow you to recognize, with more than just a feeling, the state of your mind and body and how they relate to your performance. In the coming years, you can expect biofeedback to go from niche concern to widespread trend.