I've had a killer headache all day and I am scheduled for a two-mile workout. Can I do it? I did.
Like a fictional drug addict who said "I never took a pill I didn't have a pain for" (Michael Palmer, The First Patient) , I never quit an exercise program I didn't have a medical excuse for. A headache, or cramps, or sore legs, or whatever. I don't mean serious medical things, but small things that I let become obstacles. So I did the two-miler, and I feel sweaty but less pain in my head, for a little while at least. Worth it? You bet!