Amazing that you can get much the same functionality in a off brand $30 watch these days - at least monitors sleep and blood oxygen - although it explicitly does not do medical diagnosis. Still every senior should have one for many reasons.
Do you mean per hour?
Additionaly increasing blood pressure on the head helps for sleeping more. I do that and sleep for an average of 10 hours a day. 12 hours or 14 hours/day of sleep for me, is not rare either.
Also increasing the blood pressure on the head helps fix myopia 100%, like that woman astronaut who returned to earth and her eyes worked perfectly again.
In space that's the default situation. The heart pulses maniacally to keep blood circulating all around, but in no gravity places the legs are a pretty small organ, they don't need that much blood. So in space, a lot of blood ends up on the head. We can simulate that on earth for half an hour/day and it has numerous benefits.
No, but that was a popular torture fathers did to kids some decades back. I know several people, all men, whom their fathers tied the legs to a rope and hung them upside down for some hours, when they were boys. Pretty funny!
Much simpler actually. Just hung your head lower than your body, from a bed, a sofa, or even a motorcycle as much as you can, 10 minutes or half an hour.
It is a good idea to exercise at the same time, your strongest muscle on your body, your jaw muscle, by chewing imaginary leaves. That will help blood to flow on the head much quicker, and much more of it as well.
Back when we were monkeys, we chewed a lot of leaves. According to my estimations, we moved our jaw up and down, more than 10.000 times per day. That helped move blood up, towards the head, while nowadays we chew 100 times per day.
But getting fit enough for a regular headstand is a pretty solid investment from my experience.
How is increased head pressure 30-60min a day going to change the fact that your soft tissue at the back of your throat closes the airway when you're sleeping?
Any other solution to clear out liquids from nasal airways doesn't make sense. Nasal sprays for example are total garbage. Measuring how much the airways are blocked doesn't make any sense either.
The goal is to clear out stuff from the airways and there are several ways to achieve it, all of them much worse than what i describe. They all hover in 5% efficacy to 20% or 30% efficacy.
The only other solution with such a high percentage of efficacy, is to chew 10.000 times a day, which is very inefficient.
Monkeys when climbing on trees, turn upside down hundred times a day. People who climb trees and turn upside down hundred times a day, have no sleep apnea problems.
Instead of climbing on trees, there is a way to simulate that effect on the industrial age.