No exercise capacity at all (ME/CFS + POTS) – tips for holding onto muscle while on tirzepatide?

cactus_enthousiast

cactus_enthousiast

Explorer
Joined
Aug 23, 2026
Messages
7
Reaction score
0
Location
Montreal, Quebec, Canada
Hi all,

About a month into tirzepatide and the scale is already moving a bit, which gives me some hope. The problem is that I'm completely unable to do sport or any kind of physical exercise. Myalgic encephalomyelitis (ME/CFS) plus postural orthostatic tachycardia syndrome (POTS) mean I have basically zero exercise tolerance. This is a recent development and it really suck. Sports used to be a huge part of my life (weightlifting, cycling, running, skating, skiing, swimming)… 🙁

So I'm curious whether anyone else here deals with these same diagnoses, or whether any kinesiologists or other professionals might weigh in. When exercise isn't an option, how do you stay as healthy as you can on a GLP-1, particularly with regard to keeping muscle mass?

I realize that dropping weight is important for my long-term quality of life, but it's genuinely tough when you can hardly do anything physical.

I'd really appreciate hearing any experiences or advice. Thanks!
 
During weight loss, creatine can be useful for preserving muscle mass. Making protein the main source of your calories would also be worth prioritizing. That said, since I have no idea how either approach interacts with your medical conditions, run it by your doctor first.
 
FartfulCodger said:

During weight loss, creatine can be useful for preserving muscle mass. Making protein the main source of your calories would also be worth prioritizing. That said, since I have no idea how either approach interacts with your medical conditions, run it by your doctor first.
Click to expand...
Yeah, protein is definitely key, no argument there. I also take 5 mg of creatine daily. From what I've read, that's supposed to be beneficial for ME/CFS. As for the medical side, I probably understand my own condition better than my doctor does, and I'm familiar with the basic guidelines. Still, it feels SO backwards to avoid exercise…
 
Protein is clearly the number one factor — roughly 1.5g/kg based on ideal body weight — and that amount has been demonstrated to limit lean mass loss during glp-associated weight reduction. In most cases muscle loss isn't really an issue as total mass falls: a lighter body needs less muscle to move around, and almost everyone ends up with better mobility and exercise tolerance. The picture gets more complicated when sarcopenic obesity is the starting point, so it partly comes down to how much muscle you already have. Simply being overweight or obese usually raises muscle mass through anabolic effects alone, even in the absence of exercise, at least for most people. If your starting muscle mass is well below average, professional guidance could be worth seeking, though I'm not sure solid research exists to support that advice.

In my own case, a large weight loss brought my blood pressure down dramatically — from needing hypertension medication to vision going grey when I stood up, with sitting or lying bp averaging 105/65 and a drop plus high heart rate on standing, which doesn't quite meet the criteria for POTS. It may be worth monitoring whether yours shifts alongside your weight; I don't know how much you're aiming to lose, but for me the effect was substantial, and I did lose 81kg in the end.

Best of luck. I haven't been diagnosed with that condition and haven't pursued a diagnosis, since doctors tend to view it quite negatively and useful treatments are scarce, but I do have many of its features. After dropping around 30 kilos, at 115kg, I did get considerably fitter: I began with 5 minutes of walking per day, and because the amount was so small I avoided any exaggerated post-exercise exhaustion, then gradually increased it as I lost another 40 kilos. That doesn't guarantee it would work for you, but it did for me.
 
Beyond the points already raised about muscle-sparing compounds that have shown promising results in trials, it might be worth checking out the VERU phase 2B QUALITY study and forming your own view.
 
Mine isn't CF in the typical presentation. What I have is secondary adrenal insufficiency, hashimoto's, MCTD, and a myasthenia gravis variant that shows no associated antibodies. (everything autoimmune-linked)

For me, prednisone makes an enormous difference to exercise intolerance. With more of it, I go from not being able to stand up to functioning close to normal, and I can even work out.

So here's my point: prednisone comes with awful downsides, among them muscle weakness, bone weakness and thinning skin. Using it long term does damage; short term it doesn't. Even so, it can be life saving. Pred may be worth a shot (for instance: 15 or 20mg daily, very short term, no more than that), since it is amazingly anti inflammatory and could support muscle function when inflammation is playing a role.

Should you give it a try, I'd suggest a modest dose, say 15mg, taken with a bite of food (not a meal) followed by exercise 2 hours later.

Studies in ME/CFS tested hydrocortisone and found no results. That matches what I went through. Yet name brand prednisone (Hickma brand) works like a charm for me.
 
lessthanhalf said:

Protein is clearly the number one factor — roughly 1.5g/kg based on ideal body weight — and that amount has been demonstrated to limit lean mass loss during glp-associated weight reduction. In most cases muscle loss isn't really an issue as total mass falls: a lighter body needs less muscle to move around, and almost everyone ends up with better mobility and exercise tolerance. The picture gets more complicated when sarcopenic obesity is the starting point, so it partly comes down to how much muscle you already have. Simply being overweight or obese usually raises muscle mass through anabolic effects alone, even in the absence of exercise, at least for most people. If your starting muscle mass is well below average, professional guidance could be worth seeking, though I'm not sure solid research exists to support that advice.

In my own case, a large weight loss brought my blood pressure down dramatically — from needing hypertension medication to vision going grey when I stood up, with sitting or lying bp averaging 105/65 and a drop plus high heart rate on standing, which doesn't quite meet the criteria for POTS. It may be worth monitoring whether yours shifts alongside your weight; I don't know how much you're aiming to lose, but for me the effect was substantial, and I did lose 81kg in the end.

Best of luck. I haven't been diagnosed with that condition and haven't pursued a diagnosis, since doctors tend to view it quite negatively and useful treatments are scarce, but I do have many of its features. After dropping around 30 kilos, at 115kg, I did get considerably fitter: I began with 5 minutes of walking per day, and because the amount was so small I avoided any exaggerated post-exercise exhaustion, then gradually increased it as I lost another 40 kilos. That doesn't guarantee it would work for you, but it did for me.
Click to expand...
Appreciate your response! Glad your condition is getting better alongside the weight loss.

I get regular monitoring and I wear a Garmin watch, so any shifts along the way should show up. I used to be fairly muscular and was lifting heavy weights right up until I got sick in December 2025. My heart rate climbs fast, but my blood pressure is fine (neither high nor low — it's my heart doing the compensating). Since May I've been on a betablocker to bring the heart rate down (it can drop blood pressure too), so I'll be keeping track of both HR and BP.

Semaglutide was what I used before, but my insurance would only cover up to 1 mg, which is the reason I went looking for a different option. Between the betablocker and doing no exercise, my metabolism is definitely slowing, and looking at my family genes, I can tell I'm not moving in a good direction...

I'm not informing my MD that I'm switching GLP1 and raising the dose... I'll handle whatever comes of it... The heart rate is also the reason I'm avoiding Reta and staying on Tirz, since it's better tolerated.

Like you, I really hope I can gradually build up tolerance as the weight comes down. My starting weight was 123 kg (April 2024), probably due to genes, an auto-immune condition and antidepressants, and I'm at 111kg now (with fluctuations along the way). Aiming to lose at least 40 kg.
 
Creatine looks like a solid option. A few extra kgs shouldn't worry you, since that's only water weight. For your situation, KPV might be something to consider trying.
 
Back
Top