Fight week throws sleep out the window. Boxers often hit the sack around 4...

https://www.fightful.com/boxing/fight-week-the-sleep-problem-nobody-talks-about/

Fight week throws sleep out the window. Boxers often hit the sack around 4 a.m., wake at 2-4 a.m., then spend six hours locked in a cramped locker room before Friday’s early weigh-ins