Here's the acid test for appropriateness: Pretend that someone near and dear to you is witnessing what you are writing or sending, or knows what you are thinking about sending. If, say, your partner saw this behavior, how would he or she feel? That you are asking yourself this question could mean that you shouldn't be doing it!
When I run on the treadmill, I read. But I have found that the only way to read while on the treadmill is to hold the book, since it moves around too much on the stand, you move around too much. I've gotten very good at holding a book and running, which tends to screw up my neck a little bit.
Trauma survivors have a deficiency in their capacity to regulate emotions - they're too prolonged and too intense and too negative. As a corollary to affect regulation, self-esteem, sense of self and inter-personal functioning all goes downhill. And that's a chronic thing that's solved in an-inter personal context.
Back in the day, I was the first non-recovering doctor working in recovery. People would say, 'You can't do that! We need recovering guys in this.' But usually recovering doctors have a lot of baggage and so there's a certain amount of liability with a recovering doctor. But of course it can be ideal.