You can touch your palms flat to the floor. People are impressed at yoga. And you cannot work out why you keep rolling ankles, tweaking knees and collecting niggles that never quite clear. If that sounds familiar, your flexibility might be part of the problem, not the gift everyone thinks it is.
Let me paint a picture you might recognise. You were the flexible kid. You are the one who can sit in positions that make other people wince. And you are also, somehow, always nursing some small injury: a grumpy knee, an ankle that keeps going, a hip that clicks and aches. Everyone tells you to stretch more. It never helps. There may be a reason for that, and it has a name.
Joint hypermobility means your joints move beyond the normal range. It is common, though exactly how common depends enormously on the criteria used, the age group and the population studied. Estimates across the literature run from a few percent to well over half. For adults, somewhere around 10 to 20 percent is the figure most often quoted. It shows up roughly two to three times as often in women as in men. So if you are a bendy female runner, you are in a very big club, and most of the club has never been told what it means for their training.
For plenty of people hypermobility is harmless, and for some it is a genuine asset. But when loose joints meet the repetitive load of running, without enough strength and control to manage that extra range, you get the classic picture: recurring minor injuries, joints that feel unstable or unreliable, and a body that never seems to properly settle no matter how sensibly you train.
A quick, rough self-check
The Beighton score is the standard screen clinicians use. It is scored out of nine, because four of the moves are counted on each side and one is counted once. You can get a rough sense of it at home, but please treat this as a prompt to get assessed properly, not as a diagnosis you give yourself.
The five moves: bending your little finger back past 90 degrees, pulling your thumb back to touch your forearm, hyperextending your elbow more than 10 degrees, hyperextending your knee more than 10 degrees, and placing your palms flat on the floor with your knees straight. For adults, five or more out of nine is generally taken as the threshold. Note the 10 degrees on the elbows and knees, because without it almost everyone scores a point there.
Why female runners feel this more
Two things stack up for women here. First, the baseline rate of hypermobility is simply higher. Second, the hormonal environment affects soft tissue. Joint laxity does increase in pregnancy, and many women notice their joints feel looser at certain points in their cycle. I will be honest that the mechanism is less tidy than it is usually presented. Relaxin gets blamed for all of it, but studies looking for a direct link between relaxin levels and measured joint laxity have come back inconsistent, with at least one finding laxity rose in pregnancy without tracking relaxin levels at all. The effect is real. The neat single-hormone explanation is not.
Add in the well-documented female-specific injury patterns, in particular ACL tears, which women sustain at roughly two to three times the rate of men and higher still in some sports, and you can see why loose-jointed women benefit enormously from strength and control work.
I will be straight about the evidence too. Whether hypermobility alone raises your overall injury risk is genuinely mixed, and a prospective study of elite female footballers found no effect at all. The picture is clearer for some specific joints than for the body as a whole, with reasonable evidence linking hypermobility to shoulder problems and to ACL injury. But the practical picture on the ground is consistent. Lax joints with weak muscular support around them are a reliable recipe for recurring trouble, and building that support is squarely within your control, which is the good news.
The mistakes bendy runners keep making
Chasing more range when the problem is control
This is the big one, and I want to be precise about it, because the usual advice flips too far the other way. Stretching is not banned. Hypermobile bodies get genuinely stiff bits too, often from muscles working overtime to hold a joint together, and stretching those is fine and often helps. What does not help is treating every ache as tightness and cranking an already-loose joint further into range. If a joint already goes further than it should, more range is not the fix. Strength through the range you have is.
Skipping strength because running is your thing
For a hypermobile runner, strength training is not optional cross-training to drop the moment life gets busy. It is the brakes and the suspension on a car you keep flooring. Two proper sessions a week is genuinely not negotiable here, because the muscle is doing the stabilising job your ligaments are not quite managing on their own.
Doing a bit of balance work and calling it stability
Standing on one leg while you brush your teeth is a start, but balance alone does not build the control you actually need. The injury-prevention evidence is clear that balance work is not protective on its own, only in combination with strength, plyometrics and agility. Wobble boards in isolation will not get you there.
Locking out your joints to feel stable
Hanging on your hyperextended knees or elbows feels supportive in the moment but loads the ligaments instead of the muscles, which is exactly backwards. Learn to hold a soft, slightly bent, muscularly controlled position instead of dumping your bodyweight into the end of your range. It feels like harder work because it is. That is the point.
How to train strong around bendy joints
The hypermobile runner’s strength blueprint
Strength through range, twice a week
Load the big patterns: squat, hinge, lunge, calf raise and single-leg work. Full, controlled range with real, progressively heavier weight over time. The aim is muscle that can control the joint actively, not just a body that can move through a big range passively.
Single-leg everything
Running is a single-leg sport, one foot at a time, over and over. Split squats, step-ups, single-leg calf raises and single-leg deadlifts build the stability that matters most, exactly where you keep getting caught out. If you only had time for one category, this would be it.
Progress your control work deliberately
Start with simple balance, then add eyes closed, then limb movement while you balance, then being nudged slightly off balance. This graded progression is how proprioception, your sense of where your joints are in space, actually improves. Balance in isolation, never progressed, does not cut it.
Train landing and deceleration
Controlled hops, landings and change-of-direction drills teach your hips and knees to absorb and manage force. Multi-component programmes built this way cut non-contact knee injuries substantially, which lands especially close to home given the female ACL risk. Start low, land softly, build gradually.
Build running load slowly and symmetrically
Lax tissue takes longer to adapt to repetitive pounding. Nudge your mileage up gently, keep a close eye on any one joint that keeps flaring, and resist the urge to spike volume just because your lungs and your enthusiasm feel ready. Your connective tissue is the thing setting the pace, not your fitness.
Free tool
The Injury-Proof Routine
Four at-home capacity tests, then a 20-minute routine ordered by whichever link in your chain came out weakest. Built for exactly this problem.
Open the toolYour warm-up and your kit matter too
A hypermobile body often benefits from a slightly longer, more deliberate warm-up than the quick jog most runners get away with. You are waking up the muscles that have to actively stabilise joints your ligaments are not fully managing, so give them a proper chance to switch on. A few minutes of glute, calf and single-leg activation before a run is not fussy. For you it is the difference between the stabilisers doing their job from the first step or arriving halfway round the loop when the damage is already done.
Shoes are worth a thought as well. Plenty of hypermobile runners feel more secure in a shoe with a bit more structure and a stable platform underfoot, rather than something soft and sloppy that lets the foot roll wherever it fancies. There is no single right shoe for everyone, so go by feel and by what keeps your niggles quiet, but do not dismiss the idea that a more supportive shoe might simply suit your particular body better.
What progress actually looks like
Progress for a hypermobile runner is quieter and slower than the social media version of fitness, and that is completely fine. You are not chasing a wild new range of motion, because you already have range to spare. You are chasing control, and control is far less visible. It shows up as the ankle that stops rolling, the knee that stops aching on the downhills, and the gap between niggles slowly stretching from weeks into months.
Expect it to take real time. Connective tissue adapts more slowly than muscle and far more slowly than your cardiovascular fitness, which is exactly why so many bendy runners get caught out: the engine is ready long before the chassis is. Hold your nerve, keep the strength consistent even through the boring middle stretch where nothing seems to be happening, and trust that those quiet months are precisely when the robustness is actually being built.
A simple weekly shape
If you want a rough template to start from, it looks like this. Two strength sessions a week, spaced apart, built around squats, hinges, lunges and single-leg work, with a few minutes of balance and control work tacked on at the end. Running kept mostly easy while you build the strength base, with any faster work added in small, careful doses. A proper warm-up every single time, no exceptions. And an honest eye on any one joint that keeps grumbling, so you catch a niggle while it is still a whisper rather than a shout.
It is not complicated and it is not glamorous. It is just consistent. The hypermobile runners who turn things around are not doing anything clever or secret. They are doing the ordinary strength and control work, properly, for long enough to let their bodies catch up with their ambitions.
Strength does not have to mean a gym
If the gym is not your thing, or not practical right now with everything else going on, that is not a reason to skip the strength work, because you can get a very long way at home. A pair of adjustable dumbbells, or even a loaded rucksack, plus your own bodyweight, covers the essentials: split squats, step-ups onto a solid chair, single-leg calf raises off a step, glute bridges and single-leg deadlifts. The key is still progression, so make it gradually harder over time rather than doing the same easy version forever.
What matters is not the postcode of the building you train in. It is that you load the right patterns, through a controlled range, consistently, and keep nudging the difficulty upward. Consistency and progression win every time. The equipment is just a detail.
This is not a life sentence
I want to be clear about the tone here, because it would be easy to read all this and feel like your body is a liability. It is not. Hypermobility is simply a feature of how you are built, and with the right work it becomes something you manage easily rather than something that manages you. Plenty of excellent runners are hypermobile. The ones who thrive are just the ones who learned early that strength was non-negotiable for them, and then quietly got on with doing it.
Strength will not make your joints less mobile, and honestly that is not the goal. The goal is a body that can own its range rather than fall into it. Give a hypermobile runner a couple of years of consistent, progressive strength and control work and the change is genuinely dramatic. The niggles space out and then fade. The joints start to feel like yours and like they can be trusted. And the flexibility that caused you so much grief finally starts working for you instead of against you.
Four tests at home, then a twenty minute routine built around whichever one you fail.
Is this you?
- You are the bendy one, and also the one who is always quietly nursing some small injury.
- You have been told to stretch more a hundred times and it has never once actually helped.
- You love running but your joints feel loose and unreliable the moment you load them up.
Ready to stop guessing?
I coach female endurance athletes with plans built around real bodies and real lives. If you want yours built properly, come and work with me.
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