I was wondering do you burn more calories running up hill and down hummock or just running straight the whole time? I use to lately run on a track, but lately I've been on the streets which are hugely hilly.. that go up and down profoundly! I know you burn more calories running up hills, but would it be way smaller number running down? Hmmm.

How can i attain a great stomach?

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Answers:    hills are greate, way better after flat, you shouls sprint up some of the hills and powerwalk down, if you run down the hills you wikll attain shinsplits, that is very itchy

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