I know the theory, but assuming you are isolating because you have been exposed to Covid 19 rather than because you have it, are you completely confined to your house?
I was thinking about the fact that if we had to self isolate, we could at least go into the garden for fresh air etc. But would it be ok to go, say, for a drive assuming you didn't get out of the car near anyone else? Dh would get really frustrated if he couldn't run regularly. We live rurally and could drive for a mile or two and then walk/run somewhere quite isolated.
Hopefully it won't happen but if it did, having the option to go out would help a lot.