I can do a run here and there on a treadmill, but anything longer than 45 mins and I am done. I have a friend who did every training run for a marathon on a treadmill, even his 3+ hour long runs. On a side note, he didn't finish the marathon due to his legs not used to the pavement. Corland I believe you do you long runs on the roads correct?

Running on the treadmill all winter had my legs not quite ready for outside running and I had a lot of pains at first. However, the treadmill helped me create a firm base, so I wouldn't trade that for anything. There are too many times when because of my schedule with the kids and work, I would end up not running at all if it weren't for the treadmill. This past weekend I ran 20 miles with Pam. This was the longest run of my life and the longest run outside. I was pretty tired afterwards, but I did it. My legs didn't start complaining until mile 16, and then they were just tired. By mile 18 I was noticing some pain in my quads from the hills throught out the course. By mile 20 I was ready to stop. I learned that my first marathon on Sept 9th will be more trying than I hoped.

The treadmill keeps me feeling good. I use the HR monitor and the treadmill allows me to run faster in my aerobic training zone. I dont hold up well running long miles on the road. Last year I had loads of down time due to injuries. Its boring no doubt, but music, TV and audio books help a ton. I intend to start slowly transitioning the majority of my runs to the road. I currently run 20-30% of my miles outdoors. I'd like to raise that number to 80-90% before my fall marathon. Crossing my fingers hoping the injury bug stays away