Runners - Outside or Inside?

Outside, because I hate treadmills, and don't have a gym membership.

Outside! Love it. Trail running, especially. Feels more challenging, plus there are more things for me to focus on when I'm outside.

when i first started running, i stayed inside on a treadmill. it wasn't until my first race several months later that i ever ran outside. it's a completely different experience. now i rarely ever use a treadmill because i get bored after a mile or so -- but outside i can keep going. i do like to change up my route a little bit, and it does help that i live in a beautiful area where the weather is temperate year round and the scenery is gorgeous. like other runners, i do also enjoy trail running although i don't get to do much of that anymore.

Outside!! I love running somewhere...the best runs are me running, lost in my music and eventually getting lost and having to gps my way back home.

Steady state, outside 100% I can't run a 10k to treadmill city.

HIIT sprints however are all inside, all the time.

I swear I saw a treadmill in Game of Thrones being used as a torture device.

Outside for me. Treadmill is a last resort. One of my 2013 goals was zero treadmill miles. Still on pace.

Outside. Only time I ever ran on a treadmill was when I had my feet checked out for fitting running shoes and the clerk was rolling on the floor laughing at my desperate attempts to keep balance.

Outside. Why would you pay to run indoors when you can run outside on variable terrain and have interesting things to look at. Sun, Cold, wind, rain and snow it all can be fun and you don't have to pay a subscription.

Topic pretty much says it all, which do you prefer? and why?

I used to run on my treadmill, indoors all the time because I would get shin splints if I ran outside. However, I switched to outside after I had my gait analysed and had new shoes fitted and I had that done, after I ran a 5k race and realized that running outside was a little "different" to running on the treadmill.

I adore running, it has changed my life and I cannot praise it enough. I thank God that I am able to do this activity, seriously.

Outside for sure. Rain or shine, snow or sleet. I haven't run indoors for several years, and still manage to run close to 100 miles per month, even in the great white north. I love seeing other people be active. I love the fresh air, the sun... nothing is better.

I do both weekends usually outside since during the week I have too get up very early to exercise I feel that I get a better run in outside

I'm just getting into to it but I find that I run so much better (longer & faster) outside than on a treadmill! If the outdoors could be climate controlled, free of creepy men that bug you while you run (my newest experience) and loose dogs then I think I would run out there all the time! I will still use my treadmill when I have to but I definitely prefer it outside!

Definitely outside although years ago I did it inside. Right now, I run 5ks on the weekends and my training runs during the week are done in the early morning in the dark.. If its a training run, I like to get it done before work and I find outside is not as boring. I have found that when I run on a treadmill, it aggravates my feet problems. I have bunions that don't hurt if I wear the right shoes/dress shoes/ etc... However, even with good sneakers, the pounding of the treadmill hurts my feet.

edited to add. I don't mind running in rain, snow, etc.... As long as its not lightning or thunder as that is not safe. To me, it just adds variety and challenge.

Outside as well. Trail running is a very meditative experience.