over the past year I have logged many, many hours on my treadmill as part of my Ultra trail racing workouts. my work schedule does not always allow for outside workouts.
if you are new to treadmill running, I will share a few anecdotal things that I have noticed:
1. running on a treadmill always seems easier than running outside. I don’t fully understand why, but it may have something to do with the “bounce” of the treadmill surface
2. instead of focusing entirely on the treadmill speed(MPH) to set your pace, focus on HR and perceived effort. MPH on treadmills is pretty unreliable
3. I cannot explain this but: when I run outside at the same HR and PE as the treadmill, my moving pace outside is always quite a bit faster than my treadmill pace. my theory is that the treadmill absorbs propulsion energy and the hard ground outside does not.
4. running at inclines on my treadmill of up to 12%, with 20 min intervals at 10% has absolutely helped my LT, and overall ability to run hills outside.