Right now I run exclusively on a treadmill for a few reasons.
* I like being able to run when it's convenient for me. In my case, that's the middle of the night, or in the wee early morning hours before it gets light out. These aren't times I would want to be out on the dark, isolated trails or on streets. (Right now I work nights, so I run at odd hours compared to most people).
* I love the fact that I'm in an air-conditioned room with fans on full blast! It's been scorching here recently because we are having a heat wave, and it's still 80-90 degrees in the middle of the night! Ugh.
* I can wear my earphones and zone out listening to music and not worry about being attacked by some psycho or rapist.
* I can watch movies or TV to distract myself.
* When I run outside I don't carry a water bottle. So when I run on my treadmill I can gulp down some icy water whenever I feel the need.
* I can more easily see small measures of progress, such as a little bump up in my speed.
* And mostly, it's because at home I can wear a little pair of compression shorts and a jog-bra. No one is around to see my jelly belly or my thunder thighs as I chug along.

I'd never
dare go out wearing that in public! I'd have to throw on a pair of loose shorts over the compression shorts, and a shirt or tank top to cover up with.
But, having said all that, I do eventually want to get back to running outside again. I enjoyed it when I did it years ago for all the same reasons already mentioned in other posts.
