am: 2 miles with Sumo, then about 2 hours later ran 13 miles in 2 hours. These runs are very hard for me for a couple of reasons. I have not been carrying any nutrition or water, did not get much of anything for breakfast, and running on snow may be more difficult than I realize.
Total miles = 15
My upper back discomfort does not help. I've been carefully doing some back extensions on the exercise ball daily.