Welcome! I've been learning a lot from this group. I am turning 81 in January and have lived a similar active life. I let my three mile a day habit lapse when I moved to a desert house in southern Utah. I thought the five or six mile hikes were a good replacement. Then I stopped the hikes -- too hot, too early, etc. I thought my weekly pilates, yoga, and aerial yoga was enough. I developed all your same health concerns. I had a bunch of tests on a bunch of machines. Then meds prescribed and taken. I was still lethargic and fuzzy headed. I am now feeling better because we acquired an Aussiedoodle puppy -- a wild woman dog who requires a two to three mile walk on the desert every morning. I think I have found my cure...back to that daily workout to start the day. That probably isn't your answer, but thought you should know you aren't alone in the frustration of living actively, eating healthily and not getting rewarded as well as you should be. But, then again, I look at other 80 year olds and count my blessings.