Last night at Sunshine's cross country meet, I was asked by a friend about using the incline on a treadmill which got me to thinking about a statement Jillian Michaels made during her radio show on KFI. It went something like this:
"If you use less than 1% incline on a treadmill, it's like going downhill."
So at a minimum, set your incline to 1.0 and give it a go. Once you get warmed up, start using the incline to raise your heart rate and see how tough those hills really are!