I'm truly sorry to hear about what you're going through - and also very happy that you've found a holistic solution with plain ol' ginger root, available at any grocery store. I'm the same as your husband, in the gym 7x week and with a very troublesome rhomboid muscle spasm that radiates into my neck when I sleep. I'll try your remedy.
I have osteoarthritis so I'm familiar with inflammation. In the last year I dropped from 190 lbs to 160 lbs and that has helped greatly. I also took an honest look at my diet, and cut out almost all refined sugar products, including my beloved regular coke, which is a can full of sugar. I also started spin classes and do that 5x/week and that has really helped with weight loss, though not for everyone.
Another thing I learned - sugar causes inflammation in the body. Taking it out of your diet eases the inflammation. It's an easy way to feel better, but does require determination to just get it done.
All the best to you, and thanks again. Joe
Cutting out processed sugar helped to dramatically reduce internal inflammation. I found I can still handle natural sugar as in fruit, at least 2 servings a day.