Why aren't doctors, especially researchers, more interested in defining the different muscle pain qualities in more detail?
I think most MDs (and for that matter, most DVMs) get little practical training in muscle physiology. They kinda skim over the topic and leave it to the physical therapists, occupational therapists, deep muscle therapists and sports physicians to address it. When it comes to muscle issues of any kind, the last person I want to see is my physician. Instead, I head right to a good physical therapist (one proficient in dry needling and one who works independently, not in a PT shop).
It is amazing what my favorite PT has taught me about my muscles, myofascia, posture, movement and even breathing (none of which my physician really understands), and when it comes to living more pain-free than painful, I owe her everything.