Fight week sleep is a killer. Fighters often hit the sack around 4 or 5 am but...

https://melissamuse438.gumroad.com/p/can-a-fighter-trust-a-website-claim-about-legality-and-testing

Fight week sleep is a killer. Fighters often hit the sack around 4 or 5 am but have to be up between 2 and 4 for weigh-ins Friday morning. Add six hours in a noisy locker room before doors open at 6 pm, and it’s no wonder sleep doesn't stand a chance.