so I rock out on the Planet Fitness treadmill and can do my routine no problems...of course I'm beat afterwards but I'm usually not on the verge of death
I do the same routine at my hotel fitness center from time to time and it tells me I run the same distance and I do the same times...BUT IT BEATS THE SHIT OUT OF ME. It's like almost twice as hard for me to finish. I still finish, but at the end...I wonder why I'm so ****ing killed on one treadmill and not on the other?
Are all threadmills not created equally?