Ha. Well I don't think its really worthy of an argument, but I get your point. I believe that track running is harder than treadmill. I do both. The reason is that treamills have the ground literally moving for you. Also, unless you put your grade to 1% you are actually running DOWNHILL on the treadmill. 1% more accurately mimics the ground outside. For track running you are moving the ground past you, engaging more leg muscles, you also have to compensate for turning, engaging even more leg muscles. The only reason I'd ever see treadmill as harder is that its soooo hecka boring it does take more work just to stay on the darn thing.
