When I run on the treadmill, the computer display says I do 9 minute miles and it feels really fast and difficult. When I run on the ground, around my neighborhood, using paths I've measured through my bike computer and/or googlemaps, my pace is 8 minute miles with less perceived effort.
Why does it feel harder when running on the treadmill than on flat ground? I thought that the action of the moving belt on a treadmill actually helped you cheat a faster pace. Is it just me?