I'm (barely) 5' 11", and I hover around 175 lbs. through diet, alone. Many years ago, my highest weight was 265 lbs. I dealt with my back occasionally "going o

I'm (barely) 5' 11", and I hover around 175 lbs. through diet, alone. Many years ago, my highest weight was 265 lbs. I dealt with my back occasionally "going out" entirely for years, to the point where I couldn't leave my bed for a day or more. I was able to correct this through isometric exercises, specifically "planking" (or "plank pose"), to build core muscles, protecting my spine. I suggest using the front, back, and side poses in which you rest on your elbows. This keeps you closer to the floor. This way, when your muscles give out (and they will) you'll be able to bring yourself down gently. Once you become familiar with the feeling of activating your core muscle groups, you can do a lighter form of the same exercise while walking, sitting, or simply standing. In fact, engaging your core muscles is essential to avoiding injury during other exercises, and planks are a great way to make a habit of it. Exercise aside, I'm probably not telling you anything you haven't heard before, but examine your diet and see what can be adjusted. More and more, my diet looks like Dave Asprey's Bulletproof Diet, and I've never felt better. Best of luck!