I'm quite amused at being called more intelligent because I'm pretty sure that I do NOT understand all the terminology or even the basic science behind the theory! But after reading a bit, and watching the video, I thought that I understood at least the general idea of what CFS patients are supposed to do about exercise. It's kind of like knowing how to drive a car without having any understanding of internal combustion engines. :Retro smile:
So, here's what I got out of the video.
First, they say that everyone, CFS patients and everyone else, have more than one "energy system." But in CFS patients one (or more?) of these energy producing systems are broken. So, she is advising that CFS patients work only within that energy system that is still working (I'm avoiding naming any of these energy systems to avoid confusion).
So, what should CFS patients actually do with this information?
First of all, it seems to reaffirm what most CFS patients already know from trial and error. They know that they cannot use the general exercise guidelines. This is true for both heart rate (e.g., that rule that says take 220, subtract your age, then multiple by some percentage to get the optimal heart rate for your workout) and for length of exercise (e.g., 20-30 minutes per day).
CFS patients should NOT follow these general rules. Instead, they must start very small - try not to go above a certain heart rate and don't go longer than a certain time. In one of the PDF files you attached they suggested an exercise duration of 30 SECONDS (not minutes) to start. And build in rest periods of 3 to 6 times longer than the exercise periods. That's quite different from 20-30 minutes.
The problem comes in trying to calculate exact numbers. What is the appropriate heart rate for your workout? How long should you "exercise"? (or do some activity - stretching or whatever) How long to rest? How often?
Without a fancy testing set up and a personalized trainer I don't know how anyone can really KNOW these variables. So, I think we have to rely on trial and error, start really small, take lots of rest breaks, and do less if there are symptoms the next day.
The new thing for me is to be aware of my heart rate and sit down and rest when it starts to get too high. My instinct, even though I try to pace myself and to rest a lot, is to finish whatever activity I'm doing (e.g., unloading dishes or something like that, not "exercise") instead of sitting down to rest. I think to myself, "I'll just finish this one last thing and then I'll sit down." But I think that means that at those times I'm probably going over my limits without even realizing it because it doesn't really feel like I'm pushing myself to do something so minor. But I guess my body thinks it is "exercise" whether my mind wants to admit it or not.
To state my problem less obtusely: If I walk to the bus stop, that's a bad idea, however, if I sprint to the bus stop (as long as it's not too far away), then I'm safe. It seems I just haven't been moving fast enough? Is this right?
This suggestion above seems wrong to me. I don't think sprinting or doing things faster is the answer. I don't actually know "the answer" but the general idea seems to be that you should do any exercise or activity in small bits, taking lots of rest, and building up slowly.
This is long and rambling and may not be what you were looking for. I hope you do find someone who can actually explain the whole aerobic/anaerobic thing. I can only focus on the practical "What should I do about it?" questions.