How can it ever be?

Im leon. Im going to gym almost everyday, im a very mascular man (6packs muscles etc..).
Few hours ago i had a bet with a 16 years old girl from the gym about our durability (stamina).
She is a beautiful girl, se does gymnastics, blonde and tall.
We decided to see who can holds more time when the other is chocking him, and who can run faster a 3KM run.
But she won. She held 2 minutes and 40 seconds when i chocked her, i held onmy 1 minute and 36 seconds and almost lost counscious.
The 3 KM run i did in 14:10 and she done it in an amazing 12:01!
How can that be?

forevershorts

Choking is really bad, gentleman, and avoid that at all costs.

And that girl might be particularly well trained, there is no need to compare.