I've read that running (as with many things) is all in the mind. Your body will tell you that you can't do it, but if your mind says you can, then your body will have to follow suit.
I definitely experienced that this afternoon.
The first 2 miles of my run looked like this:
"I hate this. Why am I doing this? My ankles hurt. There's a park bench right there. I should sit down and call it a day. Seriously... I knew I never liked running."
But then, magically, my last 2 miles were excellent. A big part of it was that I switched my music to Christian rap. Who ever thought that Christian rap would be so good? Not me. But some of it is really great (e.g. Lecrae, Flame).
After that... I was all like "I love running! This is awesome!"
He is a war veteran who wrote about his experience at war, coming back to New York City, life with PTSD, and the wonderful effect of getting a service dog.
It is great read. I learned tons about PTSD and service dogs. For instance, did you know that service dogs start training at three days old? And also, that it can cost up to $25,000 to train a dog for this very special role?