Little Bluestem,
What I forgot to say is that exercise is exactly what jassysan is trying to achieve with lying down with low breath. Only much more effective. MUCH more.
You can start slowly if you are exhausted. Let's say do 3 minutes the first time, then go up to 5 etc... until you reach the 11 minutes at one go.
You could start with 4 minutes three times a day to get used to it.
The point is : something only happens after the body is used to the rhythm and secure in it. You do not get the hormonal effects if you stop at 3 minutes. But if you are too weak to go on, you are still teaching the body to do this, so there is an effect, you ARE regaining ground. If you start with shorter timings, it is a start and you will soon get it right.
Once you can do it 11 minutes at one go, you can do it several times a day. But not just after eating. Time of day does not otherwise matter.
This is something you should do every day at least once. Commit yourself for 40 days. If you miss one day, start again counting from day one.
This is teaching new ways to your brain and body, it is also a kind of training. You will notice it will influence your breath in the rest of the day and the night (then it happens but you don't notice it!). This is a very small thing with very subtle results.
After a couple of weeks it is a good idea to change the line you are singing. This changes the movements of the jaw and hits of the tongue. I forgot to say : choose a nice line, not something gloomy!
Good luck!
Asklipia
To retierate, all I have to do is to sing "DO RE MI FA SOL LA SI DO" start for one minute then increase to 15 mins over a period
of months?