I had the chance during a long ride on Saturday (we had actual no rain and sometimes sun....) to notice my riding stance and the effect on my neck. I realized that sometimes climbing a long/steep hill, or when tired, I tend to kind of collapse my neck and shoulders. I tried what the yogis/pilates folks call putting attention on, or energizing, that area. I was almost pushing lightly on the handlebars and keeping strength and attention on neck/shoulders. Does that make sense? I noticed that when I did this that my "core" ab muscles were more engaged and I rode better, and did not have soreness in my neck. I tend to have bad neck issues, probably from years of reading, writing and looking at computer screens.