Went for a run the other day. Managed 2 miles. Felt great, but my hips were sore for a day or so afterwards.

It didn't make sense though. When I run on the treadmill, I've NEVER sore. But every single time I run outside, my hips ache like crazy for days afterwards. I said this is Aaron and he explained that running outside is harder on your joints because you're pushing yourself. On a treadmill, you're just trying to keep up with the belt. Makes sense to me. But, I'd much rather be outside and running. I despise treadmills. I just wish running outside wasn't so killer on my hips.