If you are running up a hill in the real world, it’s harder than running on a flat surface because you need to do all the work required to lift your body mass vertically. The work is based on the force (your weight) times the distance travelled (the vertical distance).
But if you are on a treadmill, no matter what “incline” setting you put it at, your body mass isn’t going anywhere. I don’t see how there’s any more work being done than just running normally on a treadmill. Is running at a 3% incline on a treadmill calorically equivalent to running up a 3% hill?
In: Engineering
You are still lifting yourself up a hill, it’s just that the treadmill is pulling you back down as soon as it happens. It’s exactly the same as how a treadmill works without an incline.
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