I knew this twenty years ago. It is only now becoming a popularly accepted idea.
I had a feeling that almost everything that goes wrong in the human body begins with swelling of one form or another. It is funny how you just know this instinctively for a long time but whenever you try to explain it to somebody else they don't register it until some doctor is on television telling them the same thing many decades later. I can remember sitting in a diner in New York City attempting to transmit this idea to some guy who sold books with me and him just staring at me like I was talking about UFO's. It was really important, I knew it back then. I suspected back in those days it had something to do with cancer and today most doctors are headed in this line of inquiry. The cancer cell is a cell that gets sick of being inflamed all the time and anaerobic and it decides to switch to a sugar diet. Sunlight plays a huge role in all of it, I knew it back then. The cells in your body need sunlight to set their regulatory clocks and when they don't have it they easily slip into a sort of Mad Hatter topsy-turvy internal world where there is no source of truth.
I suspect the worst damage to people with various sleep disorders is swelling in the brain and in the heart from lack of sleep. I believe that insulin then does different types of damage to inflamed tissue if it connects when it is swollen like this. Snoring and lack of oxygen both cause inflammation, making sleep apnea one of the biggest killers of them all. Seriously, sleep apnea is more deadly than smoking a carton of cigarettes a day.
I noticed again and again when lifting weights that whenever I did things that helped reduce swelling and inflammation, my recovery was always quicker and I rebounded much more strongly. I always felt that sunlight and vitamin D played some vital role in controlling inflammatory reactions. I knew the worst sign you were overtraining was swollen feelings in muscles that persisted many days after your workout. This was a sign you had not recovered and should not exert yourself again until these symptoms abated. The important thing was not to simply train when you could, but rather when your body had fully charged itself again and all swelling was gone. I made great gains using these ideas in my late 20's, increasing my strength by 5%-10% a week sometimes for months in a row. Funnily enough, at a time when protein was villified as the food of the devil and heart disease, I knew a big shot of protein, particularly from eggs or fish, made swelling go down all over the body quickly within an hour or so of eating. Steamed vegetables were nearly as effective or better at making that hot and sore feeling go away.
I was able to apply these notions to myself but it was always wasted time trying to elaborate on these concepts for other people. It frustrated me, like everything else in this life. I have had Cassandra Complex for so long it has become a sort of comic relief in my personality.
Nietzsche said that some men can learn everything they need to know in life by noticing the smallest reactions of physiology in themselves - their feelings when eating a long or a short egg, the sensations they get before a storm is coming, their emotional reactions to sunlight and sunset. Other men spend their whole lives learning and never really learn anything because they never acquire any self knowledge. You understand what is going on inside of you, the rest of the universe is downhill from there.