Nap trial (NAP)
The nap trial involved athletes attending a dedicated sleep room for a period of 1 hour at 1200 hours. The room was dark and temperature-controlled at 18°C, athletes were provided with eye masks, earplugs, and beds in which to sleep. Athletes were not allowed to bring phones or other technology (e.g. smartwatches) into the sleep room. Athletes were required to stay in the sleep room for the entire hour period and were required to relax in the sleep room for the hour if they could not get to sleep. Following the 1-hour nap period, athletes were asked if they napped (yes or no) and were to report their self-estimated nap duration. During the same 1-hour period, the CON condition was instructed not to sleep and not to consume caffeine or any other stimulants. Athletes were otherwise allowed to do as they usually would between morning and afternoon training sessions, including having access to phones and other technology, such as games and music in the team lounge.