I believe that today’s weather was the coldest in which I have ever run. It’s possible that I ran in colder weather back in my 20s or 30s, but if I did, I have forgotten. I have, however, biked in colder weather than today’s (and may do so again tomorrow morning). I headed out at around 10:30am, and ran 7 miles. The temperature was somewhere in the mid-teens, but perhaps more importantly, the sun was shining and winds were light. I changed things up a bit from my usual running garb: I wore 32° Heat synthetic long-sleeve shirt and long johns, Kühl running pants (relaxed fit instead of my usual tights), Under Armour long-sleeve top, Patagonia R1 jacket, REI balaclava, Injinji Snow calf-height toe socks, Correct Toes, winter gloves, and Xero Mesa Trail waterproof shoes. I also put petroleum jelly on the exposed parts of my face (cheeks, nose, forehead).
Notes:
- I worked up a good sweat in this gear. The gloves were a poor choice- my hands got too warm and sweaty, and I ended up taking the gloves off for probably 50% of the run. I should probably go with mittens over light liner gloves instead.
- I am becoming a big fan of the Injinji Snow socks. My feet never got even the slightest bit cold. I may try these socks out for biking as well. In any case, I think I need to pick up another pair or two of them.
- The balaclava was a mixed bag, much as it is with cold weather biking. Depending mainly on what direction I was facing, I alternately wore it up over my mouth or down around my chin. It kept my head and neck nice and warm. When I pulled it up over my nose and mouth, my sunglasses fogged up. With my mouth covered and my nose exposed, the balaclava did a decent job, but any breathing out of my mouth got it damp, so I mostly kept it up over my chin with my mouth exposed, again similar to how I use it on the bike. That worked well for most of the run, but was uncomfortable with any kind of headwind. I’m going to need to use something else if I ever want to run on a really windy, frigid day.
- The pants worked out well. With tights, my legs sometimes get uncomfortably cold when the temperature is below 20. The combination of the 32° Heat long johns and looser-fitting running pants was quite comfortable. Never underestimate the power of air as an insulator! I didn’t seem to sweat as much “down there”, either. (Incidentally, 32° Heat is a Costco house brand. The material is a polyester/acrylic/rayon/spandex blend.)
- I had a similar issue that I typically encounter in the summer: I kind of “hit the wall” around mile 6. It was a very similar feeling to what happens on a hot, humid summer day: I just run out of energy, and continuing becomes a struggle. I’m now wondering if it’s something to do with breathing and oxygen intake: it’s a lot harder to efficiently breathe when the air temperature is so cold. This is even more noticeable when I have to exert more (e.g. when running uphill). Similarly, in the summer, the humid, oppressive air (particularly on “code orange” days) can be hard to breathe as well. In the cold, this kind of goes back to choice of headgear: maybe I need something that will let me breathe more effectively with my mouth and nose covered, as that would help to warm the air I’m taking in. I should probably also just realize that I can’t operate at optimal levels of exertion on these kind of days, and maybe make a conscious effort to set a relaxed pace (particularly at the start of the run) and take the whole thing a little easier.