Fight week throws athletes into a tough sleep cycle. Early weigh-ins Friday...

https://atavi.com/share/y36yqbz1iu5vc

Fight week throws athletes into a tough sleep cycle. Early weigh-ins Friday morning and locker rooms open at 6 PM mean fighters often get to bed around 4 or 5 AM. Waking between 2 and 4 AM throws off rest just when focus is key