Todd Davenport Profile picture
Nov 7, 2022 17 tweets 8 min read Read on X
Hi @ManvBrain. Thanks for an interesting article in @NYMag. What a great premise; to suggest #LongCovid is a condition that rhymes with #MECFS. We totally agree on that. Not everyone with #LongCovid has #MECFS of course, but enough do that the analogy has some intellectual merit.
My name is Todd. I've been involved in #MECFS research and clinical practice for about the past 15 years. Since the start of the pandemic, I've been working to build on efforts of patient-experts to warn folks about the potential and eventuality of post-viral fatigue syndromes.
As you're getting what we'd call post-publication review on the article, and there's no good football games on to watch this evening, I thought I'd connect here to provide a few thoughts. I'm definitely open to discussing these thoughts offline. My DMs, as the kids say, are open.
To answer the question in the title, I'd say 'sure.' Disabling fatigue of post-viral origin has long been the most common illness people have never heard of. Up to 4 million people in the U.S. had #MECFS prior to the COVID and 90% estimated not yet diagnosed. So maybe 40 million.
In any any event, as you rightly point out, the early efforts of patients and scientists, many of whom with #MECFS and acting at great cost to their own wellbeing and functioning, saw the potential need to more research and treatments for the coming pandemic of chronic illness.
Then, as you also rightly point out, the early work of patients and scientists, many of whom living with #LongCovid, working against the clinical and scientific communities, made their own label and also have done much of the formative scholarly work on their *own disease.*
These observations lead to my first takeaway from the article. Patients living with #MECFS and #LongCovid aren't 'militant' as the quote suggests or 'sore losers' because they science didn't go their way; they are the closest thing we have to bonafide experts on these conditions.
Researchers and clinicians like me learn every day from patients living with these conditions. So far, we take ideas, test them, and disseminate the ones that seem to work, but the patients are always ahead of us. We dismiss them or fail to listen to our collective disadvantage.
This observation leads to my second takeaway from the article. Patients have long told us that graded exercise and cognitive behavior therapy don't work well or they cause symptoms to be worse. In the article, you interviewed proponents of these treatments but not the other side.
If you had interviewed folks who work on exercise research paradigms, the article look different. For example, maybe the article would have discussed studies indicating there are problems with metabolic, immune, and neurological functioning that are *worsened with activity.*
And it would be this data that makes cognitive behavior therapy look like a band-aid and graded exercise therapy look harmful. If I had covered up the dateline, I'd have thought this article was published 10 years ago and certainly prior to 2015. We've learned a lot since then.
We learned the shiniest evidence for CBT and exercise wasn't worth the paper it was printed on. By the time the article was published, subjects who worsened could be classified as improved. These were the scientists you chose to quote in the article and defend on social media.
In fact, you'd be hard-pressed to find a clinical guideline in #MECFS and #LongCovid anymore that recommend CBT and graded exercise as a first intervention, because we now know the evidence you have decided is so solid turned out to be more like the emperor's new clothes. Tweet text: If I had to sum...
As a physical therapist, I would love to prescribe exercise for #MECFS and #LongCovid! It would totally align with my professional training and also my worldview as a person and as a clinician. But I don't, at least at first, because it makes people worse.

First, do no harm.
The syllogistic fallacy 'if exercise helps tired people then exercise must help #LongCovid and #MECFS' isn't new. And neither is the article's premise that #MECFS and #LongCovid must be psychogenic, despite not one shred of scientific evidence establishing actual causation.
The article ends with an odd - and oddly strong - bias toward this unproven default psychogenic etiology for #MECFS and #LongCovid. I guess I'll never understand how we can start from the idea of something other than psychiatric disorder causing other conditions -- but not these.
Anyway, as I mentioned, I’m happy for a chat. Or not. Either way. We need to educate the public about #MECFS and #LongCovid, because our governments have decided it’s not worthwhile. The fourth estate is all we have. So we need to make sure we get this right. I’d be glad to help.

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More from @sunsopeningband

May 19
If your theory of PEM/PENE doesn’t prominently feature bioenergetic impairment in cells composing all the body’s tissues/systems, then it doesn’t address the proximate cause of signs, symptoms, and disability associated with PEM/PENE in ME and “ME subtypes” of other conditions.
Do what you want with modifying immune system functioning or killing virus. Maybe you can temporarily lower the burden on a fundamentally de-energized immune system and inconsistently observe changes in PEM/PENE in some people. We’ve seen it in some phase II/III testing in ME.
But until you meaningfully address the underlying faulty energy system of the immune system (and other tissues), there will be no long-term cure. And getting there will require a different approach to thinking about this family of diseases, which puts observed immune system …
Read 4 tweets
May 8
A lot of smart people don’t get this nuance quite right, as this cardiologist demonstrates here, and this misunderstanding—while it seems quibbling—has deep implications for how we think about treating people living with post-exertional malaise, including people with Long Covid.
Exercise intolerance is a limited ability for physical activity. It's a broad definition. There are many reasons why someone may have exercise intolerance. We see it in people who have heart, lung, circulatory, and metabolic diseases. We even see it in otherwise healthy people.
Maybe the most common reason for exercise intolerance is deconditioning. This happens when a person can't do exercise because their body isn't physiologically prepared do it. However, in deconditioning and most cardiorespiratory diseases, the body maintains the ability to ...
Read 20 tweets
May 7
I spoke with members of the NIH RECOVER oversight committee in a meeting that was going to include the RECOVER-ENERGIZE PI before it didn't. My input was to include pacing in an adaptive design to ensure participants could move in and out of exercise groups if they crashed.
Instead, what we got was the UK PACE trial without the CBT arm. In other words, repeating the same mistakes at scale that we've already made with ME/CFS. Pacing is a core competency of attempting to live with PEM, not a separate intervention to be compared to others.
The current conceptualization of RECOVER-ENERGIZE fails to reflect the reality of PEM and how strategies to balance activity with rest are used to manage PEM. So, not only is the trial unrealistic, it's unlikely to balance risks and harms to participants. It shouldn't pass IRB.
Read 9 tweets
Apr 28
Exercising in Long Covid is the source of a lot of discussion on here because we know about a subset people with the disease for whom exercise may be harmful. I have been looking this figure for the past 3 days. There are some issues I'd like to point out. sportsmedicine-open.springeropen.com/articles/10.11…
Image
First, the presence of PEM is a(n absolute or relative) contraindication to physical exercise (depending on many factors). So, the top two boxes of the chart don't make sense together because ruling out contraindications to physical exercise would necessitate ruling out PEM.
Second, I really appreciate the consideration of PEM and PEM staging because I think they do matter. Defining these stages based on the DSQ-PEM may not be valid because the tool was not set up to do this. It is best positioned as the start of a conversation, not the end of one.
Read 20 tweets
Apr 25
This tweet forms the basis for a whole clinical masterclass in "the energy system is broken and all the pacing in the world probably won't fix it enough to respond normally, so stop acting like this is a realistic expectation."
A clinician asking a patient living with PEM to pace on one hand and exercise with the other is usually the living embodiment of the expression "robbing Peter to pay Paul." Worse, we are asking the patient to do less of what they want/need to do in service of an exercise program.
If you've ever lived on a budget, you understand this idea. You have a fixed amount of money. Things like paying a financial adviser might be a fine a choice, but it takes away from basic stuff like buying ramen noodles. Most people have to prioritize based on their own budgets.
Read 5 tweets
Apr 24
@eskabadu Thanks for this interesting question and set of observations. I appreciate you sharing them, as I also appreciate the chance to share. In the first part of the thread, you asked whether I think CPET measures PEM or the energy deficit associated with it. I think it is the latter.
@eskabadu My expertise involves two-day CPETs. In this methodology, a first CPET is used as a physical stressor (more on stressors in a minute) to *induce* PEM. A second CPET 24 hours after the first one is then used to measure the physiology of the post-exertional state.
@eskabadu The difference between the first and second test reflects changes associated with PEM in people with ME/CFS, as well as "ME-subtypes" of other health conditions. We don't expect big differences between tests. ME/CFS is the only one we see a big difference reliably, during PEM.
Read 11 tweets

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