In 2004, Richard Davidson group tested the brainwaves of mind training practitioners who spent years training their mind: https://www.pnas.org/doi/10.1073/pnas.0407401101 David Goleman called those olympic level meditators: Matthieu Ricard, who also participated in the experiments, spoke of olympic champions in mind training: They reached the highest Gamma wave values in the left prefrontal cortex ever measured …