OK, I’m getting on in years, but it takes me at least 90 seconds to take a leak. I don’t think I could do 11 or 12 separate operations in that period of time, whatever they are. I suppose if I had a special device for inflating a given amount (not sure what that would be... maybe 3 seconds with a calibrated orifice on a needle), I could pull it off, but I’d have to hustle. Please allow time for unpacking and repacking the bag. 90 seconds?
(Yeah, well multiply a NASCAR pit crew's tire-changing routine by 25 -- and you & I can't still aren't likely to change a tire in that duration, you see, that's what they do for a living...they practice)
Now a lockerroom attendant is no pro pit crew, but he wouldn't need to be.
"Today’s six-member [NASCAR pitcrew] teams can change four tires and add fuel in as little as 11 seconds.." TECHNOLOGY COUNTDOWN: PIT STOPS
So a 6 member pitcrew can change 4 tires plus fuel up in 11 seconds.
that's 1 guy per tire & 1 guy fueling...the other guy is probably assisting all of the above...
Essentially, then, a pit crew member can change one tire in 11 seconds.
If an entire tire can be removed & replaced in that time...a measly 15% of air from a single football can be removed in that time -- even by somebody not operating every move at pitcrew speed!