Hydration begins days (at least 24 hours) before the event, FTX or movement.
If you just drink allot of water an hour before you go out you'll just have to pee and have to take an unhappy buddy to a tree with you; always right when they finally pick up the pace in the formation run.
play= don't drink till an hour before run.
pay = pushups for being a fallout... but sarge I I I waa wasnt a fall out...
Additionally as stated "Balance" is key.