"Last October, Michele Deitch and Alycia Welch with the University of Texas Prison and Jail Innovation Lab gave a presentation to the International Corrections and Prisons Association on the harmful sleeping conditions in prisons. There, they previewed findings from a forthcoming report entitled, 'The Nightmare of Sleep in Prison.' Among their recommendations: increasing dedicated sleep time. They define a healthy amount as at least four 90-minute cycles of uninterrupted sleep, or at least six hours."