BOTTOM LINE: Sometimes slightly flares up my symptoms; good for general health.
After my pain had come down (initially as a result of trigger point injections, but then more so after John F. Barnes myofascial release treatments) and I could do some moderate exercise for limited periods of time, I tried swimming. Lifting my head to breathe aggravated my neck pain so I started using a snorkel. Now I can swim for about twenty minutes as long as I don't use my arms too much. Using a kickboard (to rest my head on and minimize arm movement and neck muscle engagement) helps me avoid overworking my neck.
Described below is one of the many approaches I've tried or considered trying for healing my chronic myofascial pain: