Fight week is a grind, especially when weigh-ins hit Friday morning and...

https://research-wiki.win/index.php/Is_It_True_That_Sleep_Loss_Hurts_Pain_Tolerance_for_Fighters%3F

Fight week is a grind, especially when weigh-ins hit Friday morning and fighters spend six hours in the locker room before the main event. Early wake-ups at 2-4 am and bedtimes stretching to 4-5 am throw sleep out the window