article 2020 9 pages High intensity training during spaceflight: results from the NASA Sprint Study Kirk L. English, Meghan Downs, Elizabeth Goetchius, Roxanne Buxton, Jeffrey W. Ryder, Robert Ploutz-Snyder, Mark Guilliams, Jessica M. Scott, Lori L. Ploutz-Snyder Journalnpj MicrogravityDOI10.1038/s41526-020-00111-x View on DOI ↗