Welcome back to Lights Out Lab. I am Hana Kaur Dhillon. Last episode I promised we would talk about naps, and I have brought in the right person to do it. Dr Tomas Lindqvist studies daytime sleep in nurses and paramedics, and he has strong opinions about the afternoon nap that I suspect will surprise some of you. We are going to answer whether a nap is cheating, whether it wrecks your night, why twenty minutes works and forty does not, and what to do if you are on night shifts or up with a newborn and your whole idea of day and night has collapsed. Tomas, welcome, and I want to start with the question my patients are embarrassed to ask. You are listening on Witspeak Podcasts.