HACK: Neurofeedback technology measures brain wave activity and allows athletes to better understand how to control their mental states. This technology is becoming cheaper, easier to use and more mobile. Eventually, implantable sensors will provide unlimited, round-the-clock information on brain activity. With virtual reality goggles, an athlete will soon be able to simulate standing inside her mind, watching it function, while learning to better control emotion and cognition. In addition, with the use of mobile EEG readings, researchers will determine which mental states work best for individual sports activities. Eventually, coaches will be able to test brain wave activity before competition to determine which athletes are mentally prepared.