Soldato
That's a very sweeping statement you're making there.
I am a much faster runner out in the real world than I am stuck on a treadmill. I don't know what it is about running on real terrain, it tires me out less. It might be something to do with air movement.
Not a sweeping statement at all. You are the only person I know of that states they find running on a treadmill harder than outside. Even extrapolating that out would indicate 95% of people find treadmill running far easier than outside running.
If you think 95% is sweeping then fair enough. I , on the other hand, don't think it is.
May I ask your 5K time outside V treadmill and also what kind of terrain it is outside (flat, uphill, downhill etc)?