Today’s Schmidt Initiative Long Covid and exercise talk is very interesting and discussed controversies! It clarifies an argument that I have not understood very well.

Dr. Abramoff is the speaker. He calls his talk “The E-Word and Long Covid”.

His lecture broke down into three sections.

I: Exercise is good for most people and most conditions. Hippocrates thought so and there are tons of studies. We still frequently fail: more than 1/3 of world population is insufficiently active in studies. No improvement over the last 20 years and a decrease of activity in high income countries, work more sedentary, transport more sedentary, inactivity in time off. (I would add screens to that list.)

II: Before Covid, there is a study that raised major controversy regarding ME/CFS (myalgic encephalomyelitis/chronic fatigue syndrome) and exercise. The paper randomizes people with ME/CFS into four groups. 1. GET — graded exercise 2. Adaptive pacing. 3. CBT – cognitive behavioral therapy and 4. usual treatment. The study has 160 people in each of the four groups. They report lower fatigue scores in groups 1 and 3, graded exercise therapy and cognitive behavioral therapy, but not group 2 and 4. The benefits seem to still be present after two years.

There is a significant backlash from the ME/CFS population, saying this “contradicts the fundamental experience of our illness”. Controversy came out over the study’s patient selection, outcome measure selection/subjective nature, lots of letters. The result is that exercise and PT are removed from NICE and CDC Guidance Statements for treating ME/CFS.

The problem is that exercise can lead to post exertional malaise (PEM) which is not just normal tiredness or soreness from starting a new exercise. People can be bed-bound and can have trouble with ADLs (Activities of Daily Living) for days or weeks. It can disable them from working and make them worse and we still don’t know why.

Another study looked at two days in a row of activity in people reporting PEM and impaired recovery. Day one had fairly normal exercise measurements, but day two showed lower VO2 peak, reduced peak heart rate, reduced endurance, reduced peak oxygen uptake, increase respiratory exchange ratio. Something changed. This study did not have controls.

So exercise for ME/CFS is still under study, controversial and rather loaded, since in the past patients were ignored, told they should just exercise, and treated badly.

Part III:

So does Covid trigger ME/CFS? In some people is it the same? That is still unclear.

Many of the treatments are from ME/CFS – lots overlap for many. 58% of Long Covid patients meet the definition of ME/CFS (Every lecture I’ve heard gives different statistic. Constant change.) PEM is common. PEM is a major diagnostic criteria – post exertional malaise is weighted more heavily than fatigue.

The initial studies came from Italy and were on people who survived hospitalization. They mostly improved with exercise and were thought to be deconditioned.

More studies follow. Eventually studies are partly post hospitalized and partly people never hospitalized. Most of those studies show some improvement with exercise. The length of study and what they measured are all different.

In Italy there is an observational study of 506 persistent fatigue long covid, non hospitalized, group of very active before covid, skiers and ski instructors as well as previously sedentary people. Active groups had less fatigue at 12 months compared to inactive groups. Their conclusion is that functional limitations are much more transient than ME/CFS.

Conclusions: We need more clinical trials!!!

Part of the controversy is over the Recover trial in the United States that is coming up. The Recover study has 1.15 billion in funding for 4 years. There is a proposed exercise trial with PT at different intensities. There is a backlash from ME/CSF groups, who say that people with post exertional malaise should be excluded and the money should go to studying pharmacologic treatments and a potential cure.

My take on this: it is complicated. The panel discussing this says quite sensibly that each patient is different and we have to sort out and look for Post Exertional Malaise. It does change over time. It looks as if people may recover a bit better from Long Covid PEM than overall ME/CFS. However, we have known for a while that ME/CFS can be triggered by one in ten severe infections (or by stress or both!) so it is scarcely surprising that Covid-19 would trigger it. The panel says that if it’s post hospital or there is no PEM, then go ahead with graded exercise. For the PEM folks, be cautious. And the PEM folks who are athletes don’t have a good concept of pacing and find it outrageous that their bodies are responding negatively. Function and exercise level before Covid-19 is important but it does not determine who will improve.

There, can I go? My brain is full, well fed with a lot of information today. I’ve tried to pass it on to you.

Many thanks to the Schmidt Initiative, Dr. Abramoff and the panel and speakers and organizers.

For the Ragtag Daily Prompt: feed. How many hours a day do cats loll? Is it fatigue or do they just like it?