I usually live in the Chilterns where there are lots of nice hills for me to run up and hill train on, however during the term time I live in cambridge, which has 1 tiny little inline, that can't really be called a hill at all. I am training for a 10k, and although I can run this distance already, I'd like to keep up my stamina by incorporating hill training, speed training etc into my regime. Would running on an incline on a treadmill be an ok substitute for the lack of hills? What do people think. I have had knee problems in the past, so need to be careful.