I recently figured out that low humidity equals a "good" run. Learning to run on a treadmill helps with a good run. On the really humid days I've been using the treadmills at work. They have a huge fan that blows right on you, which is nice. Last week as I tried to wipe my sweat I pulled the key out so it stopped and lost my info. Argh!! I had my stop watch on so I knew my time. I did 39 minutes and felt like I could have done more. Today I did 39 minutes outside on the lakeside trail. Went 3.4 miles. The most I've run. Ever. Felt awesome.