Treadmill Walk

I planned on going to the river walk to walk again yesterday, but the temp was in the mid 40s, and I don't do cold. I decided to use my treadmill that I haven't used in almost 2 years (since before I got pregnant with my baby). The stats really boggled my mind. I felt like I was flying going 3.2 or 3.3. It certainly felt like I was going faster than I do outside. I go at a pretty easy pace, even up through the winding trail that's straight up 2000 feet.

The treadmill is mostly flat. A little incline, but nothing serious. It is a cheap Weslo one from Walmart, and the incline can't be adjusted at all. I was breathing hard and sweating pretty good after about 10 minutes. Of course, it's warmer in my house than outdoors, but I did have the fan on. These are my stats:

Splits:

Compared with my walk last Thursday:

So when I was walking, it seems to me, a slower, more relaxed pace outside, I was going 43 seconds faster per mile than on the treadmill? Not only that, outside I was not even tired. This morning I am sore. The place where the top of my thigh meets my bottom is sore. (I'm sure there's a name for that place, but I don't know it, and am too lazy to look it up.) My back hurts also. I really felt like I was going faster on the treadmill. 

Plus the calories were very different too. My treadmill asks me nothing about my weight or age. It just has some general algorithm for calculating calories burned in x distance and y time. And the fitbit is probably off as well. I may need to get a heart rate watch sooner than later. That way I'll know a pretty accurate calorie/pace count.