Learner - I agree that you should address underlying pathogens and other issues. However, I feel that this could be an added help that people are not utilising.
If you tag me, I'll know you answered me, so apologies for answering now ..
Most of the people I've talked in depth to and seen labs and gotten their doctors to run more labs turn out either to have one or more chronic, hidden infections. I think this is a low hanging fruit. The problem is, most doctors don't run adequate testing, don't repeat testing (Amy Proal says infections may be in the tissues and not always in the blood, so repeating negative testing may turn something up), and then don't interpret testing properly, then don't prescribe anything to help the patient, in the mistaken belief that people's immune systems will clear the infection(s).
The idea is that it's worth exploring doing absolutely nothing in some of these periods to use the extra energy for healing. I would still be lying down (so no extra deconditioning), just have less mental stimulus/exertion.
I hear what you are saying, but doing this regularly can lead to a deconditioning spiral if nothing else is done, too.
This illness, and hidden infections, toxicity, etc. deplete the body's resources. Activity demands resources. Replenishing diminished resources with mitochondrial and immune support resources, like B vitamins, antioxidants, carnitine/acetylcarnitine, NMN/NAD+, CoQ10/PQQ, amino acids, and mineral cofactors, gets biochemical pathways working better to support immune function, energy production, and activity.
So, while rest is important, and I do it myself, too many people are depleted in resources needed to support improved function.
The virus/toxin etc idea is difficult to unpack, as there is no way of knowing how serious any of the confections or toxic burdens are..
They deplete the immune system, damage mitochondria, trigger a wide variety of autoimmune antibodies, deplete collagen, and impact energy production and immune and nervous system function. They are the linchpin of improvement for many patients. I won't pretend everyone has an active infection, but too many have sneaky infections sapping resources, and destroying lives.
How can we be fine for some time then become much worse? Eg how did I go from mild to moderate to severe within 6 months? Did my viruses go into different tissues? Did the toxins mobilise? I don't actually know how this works in ME/CFS - how can we get worse with no changes but can't get better the same way (to a point)?
I have 2 herpesviruses that haunt me. They wait for me to have a little more activity, a little less sleep, physical or mental stress, less nutrition, let up on my antiviral, and start up again. One has immediate symptoms I'm aware of, the other I track through regular PCR testing, and I've been following them now for 6 years. I'm think it's quite easy to get worse by subtle changes one is not aware of and as the body gets laloafed down by the activities of the virus, resources are depleted faster, and other things stop working as well, and one is in a downward spiral.
Rest can help, but if one is too sick, without any other intervention - immune support, antiinfective, nutrients, rest won't do much beyond making one feel better briefly.