Question about catabolism / muscle wasting

So I've been reading about this, trying to figure out what it means/how it works. Is this caused by high cortisol levels?

I definitely don't have as bad a case as some of you but I seem to be losing muscle strength, and I never have the desire to stretch like I used to. That used to feel really good (years ago), feeling the blood rush in. When I go for walks I seem to cut them short, and I seem to be eating/craving more and more meat. Strange b/c overall my AF is improving. My hypoglycemia is completely gone, and so is my sensitivity to cold weather. Thought I read somewhere that another organ is involved, was it thyroid, parathyroid, hypothalamus? Any help? I'm too busy this week to research. I just realized there's a "Muscle Forum." Tweet