I feel more power in my legs, doing hill repeats, more than doing stair repeats. Both are awesome, but hill repeats have my vote as best. If your gonna do the stairs WALK them. Get the feel of it! You're working the same muscles. I have noticed pain, after comparing walking them, and running them. You also don't have to RUN hills, to get a hill workout in. My last race Hibiscus Half Marathon, I trained by walking hills most of the time, but don't get me wrong, I did RUN them also.
@ Angry people, that were hurt from relationships and posting about it on facebook, myspace, or any other site: Set up and hug me stand, cause you need a hug. There is hope!. You will be ok, just go for a run. ;-)
The Vitamin Shoppe, is way better than GNC. Products are priced better. Your membership doesnt expire, so you wont have to pay to get a new one every year. Way more endurance products for us swim, bike, runners. Hello Vitamin Shoppe! You have a new customer!