Are you sure that diet change has anything to do with your improvements? My personal experience is that strength training alone can do wonders.<p>10 years ago I got rather bad back problems. I tried karate, running, walking in mountains. It did not help. Then 6 years ago I went vegan for ethical reasons resulting in a drastic diet change. I expected that would affect my health - something for better (like back pain), something for worse. To my surprise that had no effects for health.<p>Then 3 years ago I read book from www.bodybyscience.net and started strength training. That really helped. Chronic back pain gradually became less bothering. The last time I experienced its acute form when one has to lay for few days was 18 months ago when previously it was 2-3 times per year. The best pert is that I only train once per week for 15-20 minutes.