4 ms·And thus the treadmill was born - running became slightly easier.by murt 6y agoAnd thus the treadmill was born - running became slightly easier.Joof 6y agoMy personal opinion is that the treadmill makes it so much harder!m463 6y agoActually, by altering the tilt you can do the same amount of exercise without switching from walking to a rundeleted 6y ago[deleted]Joof 6y agoI do trail running, sooooo... It depends and it doesn't make the running less boring.