It makes sense I guess ... I mean have you ever checked out your rubber garden hose after it's been left outside during an overnight freeze? It's stiff as road-kill! Or on the flip-side, ever tracked any of that black-tar stuff from the street in on your shoes on a 100 degree day? Road tar is made up partly of rubberized-asphalt, and it melts when it gets hot. It only stands to reason that the rubber on the soles of our running shoes will have a similar reaction to the dipping and sky-rocketing mercury.
I work for a chemical manufacturer that makes spray-on liquid rubberized-asphalt products for construction. Most of them really begin to drip and run when applied at temps over 80 degrees. Conversely, they are almost impossible to spray when it gets below 40 degrees. Rubber is a great, versatile product, but it is very vulnerable to changing temperature.
I really started noticing the temperature effect on shoes in the summer months. Typically I get about 300-400 miles out of my Brooks Trance 9 running shoes. Now, understand that I'm 180-185 lbs, a notorious heel-striker, run almost every day, and average about 10-15 miles per run - with a long run on the weekend. My shoes get more than a typical 3-5 mile, every other day workout.
But during this summer punishment, I noticed the soles would wear-thin in non-typical places. As the pavement heated up, the rubber in my soles got softer and softer. The cushioning was great, to an extent. But I felt like sometimes it was almost too cushioned. Like some of the support in this Stability shoe was breaking down. Like I could feel every tiny rock or crack in the pavement through the soles. As a result, I really saw severe wear & tear at about 150 miles, but I usually made them work until the 250 mile-marker. (hey, I'm not made of money!)
Winter
As a result of logging so many miles in these frozen rubber soles, I seem to have more connective-tissue soreness during the winter months. The knees sometimes feel a little achy. My ankles and arches are always sore. And I've battled Achilles tightness at times. I NEVER struggle with these problems in the summer months.
This winter, I mixed in a pair of Brooks Ghost 3's, which have a little more cushioning that the Trance 9's. And in the past I have tried the Asics Gel-Cumulus 10, a pure cushion-type shoe, during the deep freeze. These shoes were a little softer than my Trance 9's, but not much. I've also used trail shoes, mostly for the additional traction on slippery roads, but they are stiff as well. I can never seem to get the added cushioning I'm looking for when I can see my breath.
All this is just a long way to say that I just don't think running shoes are made for extreme temps. They seem to function best at temps of around 50 to 75 degrees. But then again, so do I!
What do you think?
Is there such a thing as a "Winter Running Shoe"?
Do you change shoes in the winter?
Do you suffer more joint pain in the winter?
...be great today!
