I am confused...
Is any one else confused?
To restate what every one else has said, but with my twist on it: Running outside is quite different, and better than running on a treadmill, or even on an indoor track. I remember high school Phys. Ed, I could run forever on the track inside, no sweat. But once the weather cleared up, got warm and we ran outside, I was a useless knob. Running maybe 1.5 kilometers at most.
No substitute for the real thing.