I walked out of Three Rivers Running Co. with a pair of Nike Zoom Structure Triax+ 13 and a new understanding of why I've been having slight knee pain.
I am now a pronator.
Yep, in the eight months since I was first fitted at the Running Co., my gait and form has changed. Casey (I think that's his name) said it's not uncommon for a runner's gait to change as she steps up her mileage. The more the body works, the more inefficient it can become. It sounds weird but from what I could ascertain, in the first year of running - especially with mileage increases - the body adapts and becomes inefficient. The longer you run ... say three years from now ... I will become more efficient.
We might not have ever figured out that I was a pronator had he not noticed how I was walking out to the parking lot to do a lap in the Nike Vomero 5+. (It's a great shoe for you neutral runners. Just sayin'.) I stepped like a neutral runner but the roll-off or kickback was that of a pronator. He tested me out on the treadmill and sure enough, the ankles rolled in slightly.
The Triax+ is a minimal stability shoe, ideal as I'm considered a mild to moderate pronator. It's also not too heavy - 9.6 ounces - but still has some cushion. Just what I wanted! I did try on the Brooks Adrenaline, which Mark bought a couple weeks ago, but I think I'm just a Nike girl. Sorry, Brooks!

Casey did say that I can still wear my neutral Mizunos for shorter runs. I could even have a new neutral for short runs and keep the stability shoe for long runs. Seeing as the Mizunos are getting high in mileage, I'll probably just stick with the Triax+. No need to give Mark a heart attack with a second demand for new shoes.