The caveat of the cold adaptation training is to avoid actual hypothermia and frostbite. If you are training in the cold, you should look up the symptoms of these problems, so that you can avoid them. One solution for me is to workout near the train lines. If you need to bail, the nice warm train is not far. Bicyclers can include a blanket or additional warm clothes in the panniers. If you are running in the near athletic range, adding a light pack for cold weather is also probably a good idea. Essentially, if you have proven to yourself that you can run 10 miles every day, then adding a light pack is no big deal.
High athleticism creates diagnostic dilemmas, so in order to avoid unnecessary problems, going to the doctor should be a last resort. Try detraining before going to the doctor. One example of a diagnostic dilemma results from the fact that muscular types are sometimes misdiagnosed as obese. Another might be the presence of low levels of heart proteins, like cardiac troponin T (cTnT) in the blood, or small abberations in the ECG. Essentially, sick people are under alot of strain, and that strain sometimes looks mistakenly like the strain of healthful physical activity.
BTW, I can't wait to try my gel Cumulus running shoes. Wow! 6+ miles on the hills planned for Saturday, and lap time continues to improve. This is great progress. I only wish I could run much more! Time will tell. experience was indispensable. Many people would find the discomfort unbearable, but the pain is transient and mild, and the knees and quads recover quickly. The benefit is clear in the improved running capacity.
Once I demonstrated that I could century ride on a bicycle reliably, running was the obvious next step for me. I hit the hills even harder this week, and I recovered more quickly as well. I'm really looking forward to pushing into the athletic range, in order to see if the benefits continue to accrue. The training schedule is friend. I would gladly run much too far without it. It occurs to me that failure in young athletes often results from failure adhere to a scientific training schedule. Another big pitfall is the temptation to set aside the diet that gave them success. Athletes who are successful in their youth probably learned exceptional nutrition skills from their mothers, and they should stick with that.
Some organizations are loathe to give up their heavy weather secrets. Other agencies may withhold crucial information for reasons that are not in the benefit of others, or guide people into unfruitful paths. Over-competitive types are often all too happy to take advantage of our weaknesses. I recommend finding better associates. Ultimately, we take responsibility for our own training. Good luck with yours.