On fatigability and rationing as improved terminology over fatigue and pacing

rvallee

Senior Member (Voting Rights)
Recently, a few discussions over terms have caught my attention on two terms that I think can make discussions of ME/CFS make more sense. Obviously terminology is a fraught issue, we are still tainted by the 'chronic fatigue' label after all this time, and this is mainly because to retire terminology, it needs to be replaced, unless that change is imposed by saboteurs, as what happened with chronic fatigue, and this hasn't happened.

Mainly, as the title says, this is about using alternative terms for two of the main concepts: fatigability, as a replacement to fatigue, and rationing, as a replacement to pacing.

Fatigue is obviously an issue in ME/CFS, but pretty much all discussions and comments made suggest to me that fatigability, a rapid increase in fatigue after minimal exertion, makes 100x more sense than fatigue. It also removes much of the nonsense about non-existent 'baselines', since no matter how well-rested someone is, with ME/CFS the issue is that it can be made significantly worse way too easily.

Especially, not all of this is PEM, and it's causing problems. The fatigability, more than fatigue, is why rest is so important. There is even a solid analogy in rocket science, where it's not velocity that matters, so much as it's acceleration, and ultimately "delta-v", the amount of acceleration that is needed to reach an orbit. We can coast through life fatigue, but we can barely ever accelerate to where it needs to be. There is the disproportionate loss of function relative to the exertion, something that is critical to understanding and managing the illness but is almost entirely missing from all discussions, and this can't be reconciled with fatigue.

Which brings me to the other term that is problematic: pacing. Pacing isn't a good enough analogy, and it's been misused so much that I don't think it can be repaired. Lots of ideologues even use the term pacing to mean GET, and we're not fixing that any time soon. If a term requires this much over-explanation, it's bad.

What I think makes much more sense as a term is, instead: rationing. Pacing in our context is usually used in as in the context of a race, where a runner can't simply sprint the whole way, have to slow down enough to make it to the end. But it can also be used the other way: pace up, increase the pace, or you will lose the race. And this has caused so many issues, especially when you consider that the best way for someone to manage a 'baseline' increase in ability to pace up is to exercise. I think this is something that breaks the minds of rehabilitation enthusiasts, because their misunderstanding of the issue is framed in the term's limits.

Rationing makes a lot of sense to me. It evokes the limited quantity of what is needed, exertion, in a way that can't be twisted to mean the opposite. It's also dynamic, as unlike the number of spoons in a house, which doesn't vary much without going to the store and purchasing (but also offers the misleading idea that one can simply just do that, buy more energy), rationing is strictly about limiting usage and making 'refilling' actions critical to the whole thing.

Rationing is not strictly restricting. When stocks are plenty, they can be used. When they are low, their use must rapidly decrease. It's also not limited to the context of a race, which pacing sort of forces to think about, and rather makes it about normal usage. To me it's just a much better analogy.

It also works very well with video game language, which most people are familiar with by now, to some degree. You may have a number of potions/bonuses/buffs, whatever, but that number may vary, it may drop almost down to zero after a rough encounter, and you may replenish as the game moves on, except life isn't designed in a way to make the game winnable, so there is no guarantee of that. It's also just as critical to inventory management to not over-use things that are in limited quantities as it's important to make use of them when needed. Life isn't a video game with easy mode turned on, we don't finish the game with an over-flowing inventory. We have to use it as needed simply to continue playing the game of life.

I think I can make better arguments for this, but it doesn't matter much what I think, I'm more interested in what others think. Right now I think we are limited by this language, more than most understand, and one way out of it is to take control of the discussion by improving on the basics of how we talk about it.
 
Fatigue is obviously an issue in ME/CFS, but pretty much all discussions and comments made suggest to me that fatigability, a rapid increase in fatigue after minimal exertion, makes 100x more sense than fatigue.

For me baseline/background fatigue (or low energy) is much more of a disabling factor than fatiguability.

For example, I don’t have the issue of raising my hands above my head as being a problem.

Maybe we are all different or have different diseases under a syndrome umbrella.

Maybe all this refining of the definitions down to the one that fits you exactly isn’t helpful?
 
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We are trying to explain the term PEM
Are we?

Some of the time we are, of course, but the subject is wider than that. Fatiguability is present all the time, whereas PEM isn't necessarily.

I'd also say fatigue isn't present all the time—though whether others agree will partly depend on what they understand the word to mean. It may also depend on severity.
 
Are we?

Some of the time we are, of course, but the subject is wider than that. Fatiguability is present all the time, whereas PEM isn't necessarily.

I'd also say fatigue isn't present all the time—though whether others agree will partly depend on what they understand the word to mean. It may also depend on severity.
Sorry but I deleted my post. I wasn't explaining myself properly. I agree with what you wrote. I didn't have fatigue for years after onset.
 
Rationing makes a lot of sense to me. It evokes the limited quantity of what is needed, exertion, in a way that can't be twisted to mean the opposite.

I agree—my only caveat is that it implies you know how much of your meat ration you have left. And you know how much you'll get when you present your coupon to the butcher next week.

That may not be a fatal flaw, but it is in there somewhere.
 
I agree that 'rationing' is a better term than pacing considering pacing is used for other chronic illnesses that benefit from 'pacing up'
Also if you said to pre-ME me,
“activity rationing”, I immediately understand. “activity pacing” sounds more like finding an efficient way to take breaks between activities while maximising the amount of activities.
 
Fatigue is obviously an issue in ME/CFS, but pretty much all discussions and comments made suggest to me that fatigability, a rapid increase in fatigue after minimal exertion, makes 100x more sense than fatigue.
Not to me it doesn't. For me, the most disabling aspect of ME/CFS is PEM, but the thing that affects me negatively every single day is fatigue. The fact that fatigability means that I tire more quickly than someone else is, for me, a sideshow compared to everything else, and would be extremely difficult to differentiate from deconditioning, even if that was possible.

[And in case I'm misunderstood, no, I'm not saying that ME/CFS is caused by deconditioning, just that it is highly likely that I, and many others, are deconditioned due to the restrictions imposed on us by ME/CFS].
 
I don’t like fatiguability as a replacement name for fatigue, because I think they are different concepts that need different names.
Though I think @rvallee points something interesting out.
Disabling baseline fatigue, which is basically the essence of many older definitions of the illness, and still heavily heavily pushed in newer definitions like the IOM, seems not to be universal. In fact in this forum it seems about 50/50 whether fatigue or fatiguability is more disabling.

For all its flaws, this is one thing the ICC does right, you can be diagnosed without having to tick some box about “extreme chronic fatigue”.
 
Though I think @rvallee points something interesting out.
Disabling baseline fatigue, which is basically the essence of many older definitions of the illness, and still heavily heavily pushed in newer definitions like the IOM, seems not to be universal. In fact in this forum it seems about 50/50 whether fatigue or fatiguability is more disabling.

For all its flaws, this is one thing the ICC does right, you can be diagnosed without having to tick some box about “extreme chronic fatigue”.
Sure. But getting rid if fatigue is not the way forward. The solution, in my opinion, is to mention and explain both.

As long as you include PEM in the diagnostic criteria, you’ll avoid the false positive from e.g. just deconditioned people. Assuming they get PEM right, of course..
 
As long as you include PEM in the diagnostic criteria, you’ll avoid the false positive from e.g. just deconditioned people. Assuming they get PEM right, of course..
The problem I was trying to say is not the false positive, but the false negative.

Say, if you have very typical ME/CFS, you’re very severe, PEM, dozens of symptoms that come from it including fatigue, but no disabling baseline fatigue.

You don’t fit the IOM or the CCC. Because they explicitly require strong basline fatigue. (But you probably fit the ICC)
 
Rationing is brilliant.

I am wary of any word that has fatigue in its root. Maybe try replacing with a word thats not even medical, but conveys similar feelings? Waning, ebbing, etc, something that connotes a dminishing.

Sorry, just spitballing. But I fully am behind the rationing idea.
 
The problem I was trying to say is not the false positive, but the false negative.

Say, if you have very typical ME/CFS, you’re very severe, PEM, dozens of symptoms that come from it including fatigue, but no disabling baseline fatigue.

You don’t fit the IOM or the CCC. Because they explicitly require strong basline fatigue. (But you probably fit the ICC)
Good points
 
Rationing is brilliant.

I am wary of any word that has fatigue in its root. Maybe try replacing with a word thats not even medical, but conveys similar feelings? Waning, ebbing, etc, something that connotes a dminishing.

Sorry, just spitballing. But I fully am behind the rationing idea.
As am I. There is an implication of shortage of something and that fits perfectly with experiencing a lack of energy. Life is making repeated choices between activities ( in the broadest sense ) because they can't all be attended to. My energy is not sufficient to do all that: choices need to be made. A bath one day, a visit another, a short outing, but they can't all be done on the same day. I like rationing.
 
For me baseline/background fatigue (or low energy) is much more of a disabling factor than fatiguability.

For example, I don’t have the issue of raising my hands above my head as being a problem.

Maybe we are all different or have different diseases under a syndrome umbrella.

Maybe all this refining of the definitions down to the one that fits you exactly isn’t helpful?
The aspect where it became obvious for me it fits the term fatigueability rather than fatigue was in ‘cognitive fatigue’ (which is ironic as if just learned there was the term of cognitive fatigue fitting because apparently it’s common in certain other conditions from an hcp friend)

I could save up all my muster to try and tackle eg a conversation - particularly where there would be direct questions. But that could never make the limit of what I had looking and sounding and thinking anywhere near the ‘appear normal’ even as an ill person stretching far enough I wouldn’t either drop off a cliff (and normally the posture stuff would go too) or brain switching off and mouth still going so being vulnerable etc at a certain point, I’d guess probably ten minutes before I realised it too.

That of course doesn’t mean I’m not a shadow of myself that I have to save it up and by that it means have kicked out with the timing of it too so that naturally it happened to be at an awake time for me that week and didn’t involve setting multiple alarms and big sleeping the day before etc.

And I'm a social person and like to think so will always not be able to help trying to push through and shake my head awake even when I'm feeling damn awful, but then even if I manage that through adrenaline or whatever it is then there are power-down robot malfunctions that start to kick in as obvious signs - whether just struggling with the physical act of talking or anomia or the thinking to be able to have words that go to my mouth, nevermind are the right thing then those types of errors will be kicking in.


And the arm thing for me too. Where if I used my arm above my head or eg a decade plus ago I carried a light shopping bag for a bit then I ended up with an arm that shook when I tried to get a drink to mouth and was , literally, ‘exhausted’

Not everything has always felt like this. But I’ve had a very hard life with no Lee way given for most of it. And I was fittter physically (although no weightlifter I did a large variety of sports) and sharper cognitively than probably anyone in my age group in the years before I got ill which I think allowed people to not acknowledge the issue (if I could still walk x faster than many or add up y who cares if I was flat on my back unable to get up in time - that must have meant its behavioural even tho I was actually diminished to a tiny % of myself), including me - who knows what was fatiguability ie 'can't' when I should have been able to if others 'get tired too' when you reframe it to isolate it to just those things and exclude that those others got to not be punished with the days I now know were PEM, not functioning at all.

And I’ve had so many different situations and deterioration. And because in an unreasonable world I’ve been required to not just mask but out perform others in order to survive that day. Then deal with the price and how to survive the next and how to hide it and so on.

So it’s always a lot of work for me to slowly go through and work out eg if the fatigue ability appears as I get iller or time has gone on or was always actually there.

I do absolutely agree however that for once trying to be strict on people not using the terminology of one when it’s inaccurate is really important however because it’s an important thing to me trying to work out what is going on and describe it. The exhaustion fatigue might some of it be ‘hang over’ from the fatigue ability that wears off enough I can push thru a bit eventually in some things I guess and ‘something else’ in other cases.

And I know that seems harsh to some exhausted people who 'just want to approx say whatever to get it across', when there is so much in-between that might indeed end up categorised in one or the other (fatigue or fatiguability or PEM) but I think it might be a helpful thought experiment to slowly think through these different things to work out if these phenomena associate with each other in specific ways. eg does my shaking arm event always lead to PEM? Which types of fatigue do or don't have some association with PEM or fatiguability and which aspects of it seem to happen separately?

I’m intriguing myself now thinking about the ‘central fatigue’ (vs peripheral’) which I’d term as that building up thing where I know I’ll eventually pass out for days and have to sleep off the physical and everything else exhaustion - is that for example a ‘building up of fatigue’ (whatever that term actually encompasses because it certainly isn’t the bps definition of it just being a state of mind as if push thru it with caffeine etc ) or ‘something else’ a bit like the fatigue ability term was suddenly needed as the arm not being usable for four hours after x clearly was
 
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