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This article is part of our comprehensive guide to hypermobility and Ehlers-Danlos syndrome.
Losing weight doesn’t appear to cause more subluxations, and the honest version of that sentence is that nobody has ever actually counted them. Not once, not in hypermobile Ehlers-Danlos syndrome, not in hypermobility spectrum disorder, and not in any group big enough to be worth quoting. What has been looked at is pain, and that picture is a good deal less comfortable, as after major weight loss, those with hypermobility don’t reliably get the relief that everybody else gets, and some of them describe more joints hurting afterwards rather than fewer [1][2].
So, the answer is a genuine “we don’t know”, though it’s the useful kind of don’t know, as the reason nobody knows is interesting in itself, and there’s a fair amount of decent research sitting either side of the gap.
The bit that catches people out is that load and stability are two different things, and they don’t have to move in the same direction. Getting lighter genuinely reduces the force going through a knee, and that’s measurable and not in dispute [3]. But a hypermobile joint isn’t unstable because of what’s pressing down on it, it’s unstable because the ligaments, the capsule and the tendons holding it together are more compliant than they should be, and shifting body mass doesn’t change any of that [4][5]. Hypermobile EDS and HSD are connective tissue problems with joint instability built into them, so a smaller number on the scales leaves the underlying tissue exactly as it was [6][7].
Which means you can genuinely take load off a joint and still end up with less control of it, if the thing that was doing the controlling went down at the same time.
That’s the argument, and the rest of this is the detail: what actually turns up in people after big weight loss, the three mechanisms that could plausibly explain it and how strong each one is, where the GLP-1 drugs sit in all of this, and the situations where losing weight is straightforwardly the right call. Some of it is solid, and a lot of it is inference from adjacent fields.
What Turns Up After Major Weight Loss
The direct human evidence here is small, and it comes down to two groups of people who’d had bariatric surgery, with not a single subluxation measured in either of them. What did get measured was pain, and how people rated their own joints afterwards.
After bariatric surgery, those with hypermobility didn’t get the multi site pain reductions that the non hypermobile ones got, and tended to keep the pain in the load bearing joints, so hips and knees mostly [1]. In a second group, looked at after the fact rather than followed forwards, those with hypermobility had increased or new pain in a greater number of joints after massive weight loss, and the differences turned up at the ankles, shoulders, hands and feet [2].
Now, look at that list again. Ankles, shoulders, hands and feet, which aren’t the joints you’d expect to improve or worsen based on how much weight is going through them, and two of them barely carry any weight at all. If this were purely a loading story, the knees and hips would move and the hands wouldn’t.
Some people also reported a change in how hypermobile they thought they were after surgery, which got interpreted as possible increased awareness of instability rather than proof that anything structural had got worse [1]. That distinction matters and it’s an easy one to skate over though, as noticing your shoulder move in a way it always moved is a different event from the shoulder starting to move further, and from the outside the two look exactly the same.
Take all of that gently though, as it’s a small amount of evidence, it’s in people who had surgery rather than people who dieted, and it measures pain and self report rather than anything a clinician watched come out of joint. None of it shows that intentional weight loss increases documented subluxation counts in hEDS or HSD, and the case for worrying is indirect and mechanism based [1][2].
One more thing about both of them, as it genuinely matters. The weight loss involved was large enough and quick enough to sit near the top end of what a body can be asked to do, which is a reasonable place to go looking for an effect, since if something is going to show up anywhere it’ll show up there. It’s an unreasonable place to draw conclusions about somebody losing a stone over a year.
What it does do is close off the comfortable assumption, as you can’t look at somebody hypermobile carrying extra weight and say “the joints will settle once that’s off”, because in the only groups anybody has followed, they largely didn’t. That isn’t the same as saying it’ll make things worse, but it does mean the confident version of the advice was never earned.
Why a Subluxation Is Such a Hard Thing to Count
If the answer is “nobody has counted”, the obvious next question is why not, and it isn’t laziness. Counting subluxations is genuinely awkward, and why it’s awkward explains a lot about the shape of everything else.
Start with what the word actually covers. In hypermobile EDS and HSD, instability sits in the ligaments, the capsule and the tendons, and what comes out of that is a spread of events: subluxations, full dislocations, sprains and soft tissue injuries, turning up across a lot of different joints rather than one troublesome one [4][5]. So it’s a category rather than an event. A shoulder that goes fully out and needs putting back is one thing, a kneecap that tracks off and slides back on its own before you’ve finished the step is another, and a rib that shifts when you turn over in bed and hurts for three days is a third. All three get called a subluxation by the person they happened to, quite reasonably, and none of them produces the same record.
Now add the practical problem, which is that almost none of this happens in front of anybody who could document it. A joint that goes and comes back has usually finished before you could get to a phone, let alone a clinician, and the imaging afterwards shows a joint sitting exactly where it should be (which is its own special kind of infuriating). So the honest record is nearly always a person saying what happened, which is perfectly fine as information and genuinely difficult as a measurement.
Then there’s the awareness problem, which is the one that turned up directly in the bariatric work, where some people rated their own hypermobility differently afterwards [1]. None of that is scepticism about what anybody reported, it’s the genuine difficulty that if you lose a lot of weight, you also change how much you move, how much you’re looking at your own body, what clothes you’re in and how much attention you’re paying to a joint somebody has just told you should be feeling better. Any one of those would change how many events get noticed and written down, without a single joint behaving any differently.
None of which makes the reports wrong, it makes counting them properly a job that needs designing carefully rather than tacking onto the end of a weight loss trial, which is presumably why it’s never been tacked onto the end of a weight loss trial.
And it leaves a gap with a very specific shape. Pain after weight loss in those with hypermobility has been measured, twice, in small groups, with results that should make everybody pause [1][2]. Joints actually coming apart has been measured never. So anybody telling you the research shows weight loss causes subluxations is describing the first of those and calling it the second.
Why Lighter Isn’t Automatically Steadier
Mechanically, weight loss does exactly what it says on the tin, as drop a kilo and the compressive and resultant forces at the knee go down, and so does the knee adduction moment while you walk [3]. That’s real, it’s measured in people with obesity related knee disease, and nothing here argues against it.
The problem is that muscles are quite clearly doing a job in there as well. They act as shock absorbers and as dynamic stabilisers, and when they’re weak, shock absorption drops, stress through the joint surface goes up and joint control gets worse [3][8].
So, you’ve got two dials. One is how much force arrives at the joint, and losing weight turns that one down. The other is how well the joint is held and steered while that force arrives, and losing weight doesn’t touch that dial directly at all, though the way most people go about losing weight tends to turn it down as a side effect. In somebody with ordinary connective tissue, dial one dominates and everything feels better. In somebody whose passive restraints were never holding much in the first place, dial two is carrying an unusual share of the work, and taking anything off it gets noticed.
Which is why “just lose the weight” is such an unsatisfying thing to be handed in a ten minute appointment.
The Muscle Problem, and It’s the Best Supported One
Of the three mechanisms that could explain any of this, muscle loss is the one with the most behind it, and it’s also the one you can actually do something about, which is a rare combination.
Muscle is the active stabiliser, and a hypermobile joint leans on it harder than an ordinary one does. That isn’t a fringe position either, as it’s why physical therapy for hypermobility spectrum disorders aims at strengthening the muscles around the joint in the first place, because those muscles are what improve mobility and dynamic control when the passive restraints are loose [9]. In hEDS specifically, muscle strength tracks with how well somebody gets out of a chair, how far they walk in six minutes and how limited they are day to day, and proprioception complicates that relationship rather than sitting neatly alongside it [10].
That last point gets skipped a lot, as the signal coming out of a lax joint is worse before the muscle even gets involved, so you’re asking a weaker system to steer using poorer information.
The proprioceptive side of it is reasonably well documented now, as hypermobile children have poorer knee position sense and weaker knee extensors and flexors than children who aren’t hypermobile [11]. In adults with generalised joint hypermobility, much the same thing turns up at the elbow, the knee, the neck and the lower back, alongside smaller limits of stability, and in some of the work, lower isometric strength in the legs or less endurance in the neck muscles [12][13][14][15].
So, the baseline is already a bit compromised before anything else happens.
Why a Hypermobile Joint Leans on Muscle Harder
It’s worth pausing on why the muscle matters disproportionately here, as it isn’t simply that there’s more work to do.
In a joint with ordinary connective tissue, the passive restraints do a decent amount of the holding for free. The ligament reaches the end of its range and simply stops the movement, no decision required, no energy spent, no delay. In a more compliant joint, that end point arrives later and more softly, so a lot of what used to be a mechanical stop now has to be an active one, which means muscle, which means the nervous system has to decide to do it and has to decide in time.
That’s a worse deal in three separate ways, and they compound. It costs energy, which is part of why hypermobility and fatigue turn up together so reliably. It has a delay built into it, as a reflex is quick but it isn’t instant, and a ligament is instant. And it depends on knowing where the joint currently is, which is exactly the information a laxer joint supplies less precisely [11][12][13].
The common workaround, in our experience and in the wider pattern of how these bodies behave, is to hold more or less everything a bit tighter all of the time, so that the joint never gets near the range where the decision has to be made. That works, in the sense that it keeps joints in, and it’s expensive, in the sense that it’s why so many of those with hypermobility are simultaneously bendy and stiff. We’d call that a compensation rather than a fault, and it’s worth saying that’s our reading of the pattern rather than something anybody has run a trial on.
But if that’s broadly what’s going on, then muscle isn’t a support act at all, it’s doing a job the tissue was supposed to do, badly paid and under time pressure, and anything that reduces how much muscle is available, or how well it’s informed, lands directly on joint stability rather than on general fitness. Which is why, out of the three, the muscle mechanism is the one worth taking seriously.
Losing Weight Costs You Some Muscle
Weight loss isn’t fat loss, however much we’d all like it to be. In healthy younger adults eating a quarter less than usual for two years, the restricted group lost fat mass and fat free mass compared with the group eating freely [16]. And in older adults with obesity doing much the same thing, even a strategy built around supplementing protein still produced a modest loss of lean tissue while overall weight came down by about seven per cent [17].
That second one is worth sitting with, as it was actively trying to protect the muscle and still didn’t quite manage it. Protein helps, it just doesn’t make the problem go away.
Now, what does losing muscle actually do to stability. In the general population we’ve got a reasonable amount on that, under the heading of sarcopenia, which is the generalised loss of muscle mass and function, and it’s associated with falls, instability, frailty and poorer outcomes after surgery [18][19]. In older adults measured on a force platform, having sarcopenia independently made postural stability worse [20]. And in people who’d had joints replaced, sarcopenia came with higher odds of the prosthetic dislocating or loosening [21].
That last one is the closest thing in the literature to a mechanical stability signal, and it needs a caveat roughly the size of a bus. A prosthetic hip is not a hypermobile shoulder, the people in that work are older and have a different problem, and nobody is claiming the numbers transfer. What it supports is the general principle, that low muscle reserve leaves a joint mechanically worse off, and that principle isn’t controversial. It’s the size of the effect in a hypermobile twenty nine year old losing fifteen kilos that nobody has the faintest idea about.
What That Adds Up To
Put the three findings next to each other and you get something that looks like a mechanism rather than a story. The active stabiliser matters more than usual in hypermobility. The signal it works from is already noisier than usual. And the standard way of losing weight reliably takes a slice off the active stabiliser.
None of which proves the joints come apart more often, because nobody has counted. But it’s a considerably better reason to be careful than “some people on the internet said it happened to them”, and it points at something specific you can protect rather than a vague instruction to be cautious.
The Fat Pad Question
Mechanism two is the one that gets mangled most often online, usually into “your body fat was holding your joints together”, so it’s worth being precise about what’s actually supported and what isn’t.
Some fat depots do a local mechanical job. The infrapatellar fat pad, the wedge of tissue sitting between the kneecap, the femur, the meniscus and the tibia, fills that space, helps distribute synovial fluid around it and absorbs impulsive loads going through the joint [22][23]. Modelled mechanically, it behaves in a non linear and viscoelastic way, and its structure lets it deform so as to actually reduce stress in the surrounding tissue [22][23]. Fat pads taken from osteoarthritic knees show measurable stiffness and viscoelastic behaviour under both compression and shear, so this isn’t a theoretical property that vanishes in real joints [24].
This is also the explanation that got floated for what turned up in those with hypermobility after bariatric surgery, that adipose tissue might have some stabilising effect and rapid loss of it might reduce stability [1]. It was raised to explain an observation though, rather than tested, so it generates a question rather than answering one.
Now, none of that means body fat generally protects hypermobile joints, and anybody telling you to stay heavier for the sake of your knees is well ahead of the evidence. Obesity raises joint load, raises the torques going through joints during ordinary movements like standing up from a chair, drives inflammatory signalling and increases osteoarthritis risk across knees, hips, ankles and other tissues [25][26][27], and that’s a much larger and much more consistent body of work than anything about fat pads.
The supported claim is narrow, and it’s worth stating in its narrow form. Some fat depots, particularly around the knee, have genuine passive mechanical functions, so losing them could in theory reduce local cushioning or space filling support even while total loading of the joint improves [24][28]. In theory, and in a knee, as nobody has shown this happening in anybody hypermobile, and nobody has connected it to a subluxation.
Worth asking what would have to be true for it to matter to you as well, because the honest answer is quite a lot of things at once. The depot would have to be one that does a mechanical job, and most body fat isn’t. The loss would have to be big enough to change the geometry of the joint rather than just its weight. And the cushioning that got lost would have to matter more than the load that also got lost, in the same joint, at the same time. That’s three conditions stacked, and the direct evidence for all three in somebody hypermobile is zero.
We’d put this one in the “plausible and probably small” box, and if a whole argument gets built on it, that’s a sign there isn’t much better material behind it. It’s popular because it’s satisfying, in that it explains a confusing experience with a tidy physical picture, and the satisfying explanations are the ones to be most suspicious of.
Collagen, and What Eating Less Might Do to It
Mechanism three is the least direct of the lot, and it’s also the one where most versions of this question anywhere on the internet go furthest past what the research actually says. So we’ll go slowly.
The reason anybody raises it at all is sound enough. The Ehlers-Danlos syndromes are disorders of collagen or of the wider extracellular matrix, its synthesis and its maintenance, and hEDS and HSD probably involve structural fragility in fascia, tendon and the supportive connective tissues [6][7][29]. If your connective tissue is already the weak link, then anything that puts the machinery for building and maintaining it under nutrient stress is at least worth asking about.
What’s been shown is in animals. In rats, restricting food reduced collagen production in articular cartilage, and it did so in proportion to how severe and how prolonged the deprivation was [30]. In a wound repair model, chronic caloric restriction decreased collagen accumulation in the new tissue along with measures related to crosslinking [31]. In adult mice, graded calorie restriction changed the elemental composition of bone collagen, which got attributed to the body mobilising its own proteins and to a genuine change in how the collagen was put together [32].
Three animal findings pointing the same way are more interesting than one on its own. They’re still three animal findings though, nobody has tested whether any of it holds in people, and there’s no work at all on collagen turnover during weight loss in anybody with hypermobility (which will surprise nobody). So treat it as a reason to suspect something rather than a reason to believe it.
Bone during caloric restriction is a bit closer to home, because there the human work exists, and it disagrees with itself. In healthy younger adults eating a quarter less for two years, bone mineral density fell at the lumbar spine, the total hip and the femoral neck, and the markers of bone turnover shifted towards resorption [16]. In young adults carrying extra weight who did six months of it, there was no significant loss of total body or hip density despite resorption markers going up [33]. And in mice, the effects go in opposite directions depending on whether you look at trabecular or cortical bone, and whether the animals are young or old [34].
So it depends on age, on duration, on the site you measure and on how much fat somebody was carrying to start with, which isn’t a satisfying answer and is unfortunately the correct one. Anybody handing you a flat “weight loss weakens your bones”, or a flat “it doesn’t”, is picking whichever half they prefer.
Weight Loss Isn’t One Thing
Something gets lost when all of this gets discussed as though losing weight were a single event with a single set of consequences, as the three mechanisms above don’t apply equally to every route.
The only direct human evidence in hypermobility comes from bariatric surgery, and surgery is the most extreme version of the thing. The loss is large, it’s fast, and it comes with an absorption change on top of the calorie change, so the two groups that sit closest to the question are also the two least like what most people reading this are actually doing [1][2]. That cuts both ways honestly, as it might mean the surgical results overstate what a slower dietary loss would do, or it might mean surgery simply got there first and showed us the effect at a size big enough to see.
Dietary restriction is the route most of the mechanism research uses, and it’s where the lean tissue findings come from. Two years of eating a quarter less took fat mass and fat free mass off healthy younger adults [16], and a protein supplemented version in older adults with obesity still took a modest amount of lean tissue while overall weight dropped by around seven per cent [17]. It’s also the route the animal collagen findings map onto most directly, as those animals had their food restricted rather than an operation [30][31].
Drug driven loss is the newest route, and the one with the least behind it in this context.
And then there’s the part nobody can control, which is where the fat actually comes off. You don’t get to choose, and the local mechanical roles that some depots play, the knee fat pad being the best characterised one, are properties of specific tissue in specific places [22][23][24]. Whether a given person’s weight loss takes much of that particular tissue, and whether it matters if it does, isn’t something anybody has measured in a hypermobile knee.
So, when somebody asks whether losing weight will make their joints worse, the more answerable question underneath it is usually how, how fast, and what’s being protected on the way. Those have partial answers, the original question doesn’t have one at all.
GLP-1 Drugs and Hypermobile Joints
This is the question we get asked most often now, and it’s usually phrased as “is Mounjaro going to wreck my shoulders”. So, the short version first: there is no evidence either way, because nobody has looked.
The GLP-1 receptor agonists cause substantial weight loss and that part isn’t in doubt [35][36], and they’ve moved well beyond diabetes into obesity treatment and a widening set of other uses [37]. What nobody has tested is whether they increase subluxations in hEDS or HSD. Nothing, in any form, in either direction, so if somebody tells you they do, or tells you they don’t, they’re telling you what they reckon.
What does exist is a tradeoff, and it’s worth understanding rather than being frightened of.
On the concerning side, these drugs take lean mass along with fat. Up to 40 per cent of the weight lost on semaglutide, and up to 25 per cent of the weight lost on tirzepatide, has been attributed to lean body mass [38]. Those are the figures that get shared around social media with an alarmed caption, and they’re real, so we’re not going to pretend otherwise. Two points from the same source never travel with them though. The lean mass loss may simply be proportional to how much weight is coming off overall, which is what happens with any large weight loss and isn’t a special property of the drug. And in some of the work, skeletal muscle index or grip strength held steady after an early dip [38].
So it’s a concern with an asterisk, rather than the muscle catastrophe it usually gets written up as.
On the reassuring side, the broader musculoskeletal signal is pretty quiet. Pool together everything that’s been properly tested, and there’s no difference between people taking a GLP-1 drug and people taking nothing in reported osteoarthritis, rheumatoid arthritis, osteoporotic fracture, synovitis or disc protrusion [39]. Which isn’t nothing, as if these drugs were quietly wrecking joints at any scale, you’d expect something to show up there.
Come at it from rheumatology or from orthopaedics and you land in roughly the same place, which is that the anti inflammatory and metabolic benefits are plausible, and that long term safety, and how much of the effect is the drug rather than the weight loss, are both still open [36][38]. Bone is genuinely uncertain. In mice, and in people whose records were looked back over rather than followed forwards, the signals are mostly neutral to mildly adverse depending on who’s being looked at and on whether diabetes is in the picture [40][41]. The common side effects in the wider obesity work are mainly gastrointestinal, and a few other safety signals turn up in the pharmacovigilance reporting, none of them specific to hypermobility [42].
Nobody in any of that had hypermobility, or if they did, nobody recorded it.
One thing to keep in mind though. Decisions about starting a GLP-1 drug, about how fast to lose weight on it, and about monitoring muscle, pain or bone along the way, need a licensed clinician who knows you have hEDS or HSD. That isn’t us covering ourselves, it’s that the monitoring is the part that makes the difference, and it isn’t something you can do from a blog.
When Losing Weight Genuinely Helps
There’s a version of all this that talks somebody out of losing weight they’d genuinely be better off without, and that would be a worse outcome than the one we’re warning about, so the other half deserves saying just as clearly.
Weight loss helps, and helps a lot, where the problem is mainly load or obesity related inflammation. Carrying extra mass increases joint stress, increases loading through ligaments, raises cartilage contact stress, changes how you walk and drives inflammatory adipokine signalling in osteoarthritis [25][27][43]. In adolescents, being hypermobile and carrying obesity together produced a stronger association with knee pain than hypermobility on its own, which is a fairly direct suggestion that extra mass amplifies symptoms at the joints taking the most mechanical punishment [44].
So if your knees are the problem and your knees are carrying a lot, weight loss is a reasonable thing to be doing, and the hypermobility doesn’t make it a bad idea.
Where it helps less, or where it can genuinely feel worse, is when the symptoms rest mostly on baseline tissue laxity, on dynamic stabilisation that wasn’t great to begin with, or on lean mass coming off quickly. That’s what came out of the bariatric groups in those with hypermobility, and it’s the only direct thing we’ve got [1][2]. It fits what turns up more widely in hypermobility too, where instability risk tracks the underlying condition rather than the body carrying it, particularly for kneecap instability and the phenotypes that dislocate repeatedly [45][46].
The sorting question, in our opinion, isn’t “should I lose weight” but “which of my problems is a load problem”, and that’s a question you can usually answer at home.
Sorting a Load Problem From an Instability Problem
This is the bit we’d actually spend a session on.
A load problem is one where the symptom scales with how much force went through the joint and how long for, so it builds across the day. It’s worse after a long walk, better after a sit down, worse on stairs, worse carrying things, and it’s fairly predictable, in that you can more or less forecast what a given day is going to cost you. That description fits the joints where obesity does measurable mechanical harm, which is mostly the knee and the hip, where extra mass raises joint stress, ligament loading and cartilage contact stress and alters the way you walk [25][43]. Take mass off that system and it improves, and being hypermobile doesn’t stop it improving.
An instability problem behaves completely differently, as it’s an event rather than an accumulation. It happens at a particular position rather than after a particular amount, it often happens when you’re doing almost nothing at all, and the size of the pain afterwards has no relationship whatsoever to the size of the force that caused it. Reaching backwards, rolling over, sneezing, standing up from a low chair while distracted. That’s the pattern that keeps turning up more widely in hypermobility, where the risk tracks the underlying condition rather than the body carrying it, most clearly for kneecap instability and the phenotypes that dislocate over and over [45][46].
The reason the distinction is worth the effort is that weight loss works on the first list and doesn’t touch the second, and the advice you get almost never separates them. Being told to lose weight for a knee that aches after a day at a market stall is decent advice. Being told to lose weight for a shoulder that comes out when you reach into a cupboard is advice for a different joint and a different problem, and it’ll be graded a failure when it doesn’t work.
Most of those with hypermobility have both lists running at once, often in the same joint, which is exactly why “did losing weight help” so often gets answered with a long pause. Half of it got better and half of it got livelier, and that’s a genuinely confusing thing to have to report to somebody who wants a yes or a no.
Being Told to Lose Weight, and Then Not Believed
There’s a pattern we see often enough in the studios that it’s worth naming, though nobody has researched it.
Somebody hypermobile gets told, more than once, that their joint pain would improve if they were lighter. They do the work and the weight comes off, and then the shoulder starts going more often than it used to, or the fingers start doing things they didn’t do before, and when they mention it, the response is usually some variation on “well, that can’t be the weight loss”. Which is technically true, in that nobody has shown it is, and completely unhelpful, in that nobody has shown it isn’t either.
The evidence gap gets used as though it were a negative finding, and it isn’t one. All that’s been done directly is two groups of people who’d had surgery, with pain measured rather than joints coming apart [1][2], and an absence of evidence in that situation means nobody looked, rather than somebody looked and found nothing.
So if you’re in that position, the correct thing to be told is that this hasn’t been studied. That’s a different sentence from “it doesn’t happen”, and it ought to be said as the different sentence it is.
What Actually Protects the Joint While the Weight Comes Off
Right, the practical part, kept inside what the evidence will actually carry.
The systems that could buffer instability during weight loss are the ones you can train. Closed chain exercise, proprioceptive training and strengthening all improve objective measures of control in those with hypermobility [47][48], and in that population it’s measured on outcomes that aren’t just somebody saying they feel better. It’s the strongest practical thing in here.
What nobody has done is test whether doing that work during a period of weight loss protects against instability. It’s the obvious study and it doesn’t exist, so what follows is us joining two solid things with a line that hasn’t been drawn yet, and you should read it that way.
– Resistance work is the priority rather than the optional extra: If muscle is the mechanism with the most behind it, and muscle is the thing that reliably comes off alongside fat [16][17], then the strengthening isn’t a nice addition to the weight loss, it’s the part that decides how the weight loss goes. Starting it before the deficit rather than after is the sensible order, though nobody has tested that either.
– Proprioceptive and closed chain work earns its place on its own merits: Both improve control measures in hypermobility [47][48], and since the signal from a lax joint is poorer before muscle enters the picture [11][12], this is the half of the problem that strength alone won’t touch. It also doesn’t need a gym, which matters if fatigue is part of your picture.
– Protein helps, and it doesn’t solve it: Building a restriction around supplemented protein in older adults with obesity still produced a modest loss of lean tissue while weight came down [17]. So protein is worth getting right and it isn’t a force field, and anybody quoting you a precise gram per kilo target for hypermobility specifically is making it up, because that work hasn’t been done.
– Speed is the variable nobody has measured: Rapid loss is what got singled out as the possible problem after bariatric surgery [1], and in animals, the collagen effect of restriction scaled with how severe and how long the deprivation was [30]. Both of those point the same way, towards slower being gentler, and neither of them is a human hypermobility finding, so treat it as a reasonable default rather than a rule.
– Track the instability as well as the scales: If your joints are doing something different, write down what and how often. Nobody has counted subluxations through a period of weight loss in anybody, which means your own record is genuinely better data than anything published, at least for you.
That last one isn’t a throwaway, as the reason this question has no answer is that the counting has never been done, and the counting isn’t technically difficult. It’s just that nobody has thought hypermobile joints were interesting enough to count.
What Nobody Has Measured
The gap is narrow and specific, so it’s worth stating it precisely rather than waving at it.
Nothing in any of this shows that intentional weight loss increases documented subluxation or dislocation counts in hEDS or HSD. The evidence is indirect and mechanism based, and what sits closest to the question in humans measures pain and self reported instability after surgery rather than joints coming out [2][1].
What would settle it isn’t complicated. Follow those with hypermobility through a period of weight loss, count subluxations before and after, and vary the kind, the speed and the composition of the loss. Whether different rates or different methods change actual subluxation frequency, rather than pain or the feeling of being less stable, is the open question, and it’s been open the whole time [1][2].
Until somebody does that, there’s a mechanism that makes sense, a small amount of human evidence pointing in an uncomfortable direction, and a lot of adjacent research that’s suggestive without being decisive, which is enough to protect the muscle and take the loss slowly, and not enough to tell anybody not to lose weight.
The Fibro Guy
