In 2024 Richard Davidson published a paper in PNAS about olympic level meditators: https://www.pnas.org/doi/full/10.1073/pnas.0407401101 Here, this paper is summarized by Daniel Goleman: Dilgo Khyentse Rinpoche did a full-time meditation training for for 13 years in solitary retreat, until he wanted to stay there for the rest of his life: Does this not mean the same …