Holy cow!!!
What a good idea!
*looks for something to make a sled with*
got great hills around here ...
What kind of belt is that that guy has on?
Actually, in retrospect, I can't say that squats, lunges, and walking hills on the treadmill did NOTHING for my hamstrings. Once upon a time (now, NOBODY laugh!!!) I could barely do 10 lbs on the hamstring curl without cramps and "OUCH YOU'RE HURTING ME!" pain. Now I can do 35, so I must have accomplished SOMETHING.
Nowhere near what you people can do I'll bet.