Isometric Exercises Anyone Can Do

Almost every piece of exercise advice handed to a person in pain assumes the joint can travel. Walk for thirty minutes. Do ten repetitions. Swim, cycle, stretch. All of it moves something through a range, and when the range is where your pain lives, the advice quietly stops being advice and becomes a reminder of what you cannot do.

Isometric exercise is the exception. You contract the muscle and the joint does not move — no range, nothing travelling, nothing to get halfway through and regret. That makes it the lowest-barrier strengthening there is, and it is genuinely worth your time. It is also surrounded by claims the research does not support, including the one you have most likely already read: that holding a contraction switches pain off.

What isometric actually means

A muscle under load can do one of three things. It can shorten, which is the lifting half of a bicep curl. It can lengthen while still holding tension, which is the lowering half, and is where most next-day soreness comes from. Or it can produce force without changing length at all. That last one is isometric — iso, same; metric, length. The muscle works. The joint stays exactly where you put it.

In practice there are three families of them:

• Holding a position against gravity. A wall sit, a plank, holding one leg straight out in front of a chair.
• Pushing or pulling against something that will not move. Palms into a wall, hands pressed together in front of your chest, your own hand against your forehead.
• Squeezing. A rolled facecloth, a soft ball, a handgrip trainer.

Nothing in any of those pictures moves, which is the whole point. You choose the joint angle before you start, so you can choose an angle that does not hurt and work there — and you can stop at any instant, because you are never mid-repetition with a weight above you or a knee bent past the point of no return.

The practical consequences are the reason this is worth an article. No equipment. No floor to get down onto and back up from. No space, no shoes, no changing your clothes. Most of them can be done sitting in a chair, several can be done in bed before you have worked out whether today is a good day, and nobody in the room can tell you are doing them.

The strongest evidence has nothing to do with pain

The best-supported thing isometric exercise does is lower blood pressure, and the size of the finding surprised the people who found it.

In 2023 a team at Canterbury Christ Church University published a network meta-analysis in the British Journal of Sports Medicine pooling 270 randomised controlled trials and 15,827 participants — every mode of exercise training that had been tested against resting blood pressure since 1990. Isometric training came out on top for both numbers, with average reductions of 8.24 mmHg systolic and 4.00 mmHg diastolic. In the network ranking for systolic pressure it scored 98.3%, ahead of combined training at 75.7%, conventional weights at 46.1%, aerobic exercise at 40.5% and interval training at 39.4%.

That ranking figure is worth unpacking, because it is not a probability that isometrics will work for you. It is the chance that this mode would finish near the top if you re-ran the whole comparison — a statement about the ordering of the evidence, not about the size of anyone's benefit. What matters more is the 8.24, and 8 mmHg off a systolic reading is in the same territory as a single blood pressure medication at a starting dose.

Drilling into the sub-modes, the isometric wall squat ranked highest of all for systolic pressure. Running ranked highest for diastolic. The protocol underneath the wall squat and handgrip trials is remarkably consistent and remarkably small: four two-minute holds with a minute of rest between them, three times a week, at roughly 30% of your maximum effort, for at least eight weeks. Twelve to twenty minutes, three times a week, against a wall.

Be clear-eyed about the limits. The individual trials are mostly small and mostly short, and a network meta-analysis compares treatments that were often never tested head to head. More importantly, every one of these studies measured the number on the cuff. None of them followed people long enough to show fewer heart attacks or strokes, which is the outcome anybody actually cares about. Lowering blood pressure by other means reliably does that, so the inference is reasonable — but it is an inference.

Your doctor probably will not raise this first

Hypertension Canada's 2025 primary care guideline does not mention isometric exercise at all. Its lifestyle section keeps to dynamic aerobic activity — the familiar 150 to 300 minutes a week of moderate movement, which in people with hypertension improves systolic and diastolic pressure by about 6.9 and 4.9 mmHg. That is not a rejection of isometrics — it is what a guideline looks like when the evidence is newer than the consensus. Guidelines are assembled from what is settled, and a finding published in 2023 has not yet had time to settle.

It does mean that if you want to try this, you will be the one bringing it up. And it means something more useful for anyone reading a pain website: if 150 minutes of moderate walking a week is not available to you — because of your knees, your back, your fatigue, or all three — then isometric training is the only form of exercise with a comparable blood pressure result that you can do sitting still. For this audience that is not a footnote. It is the single strongest argument in this article.

The pain claim that outran its evidence

Now the part you probably came for, and the part where the internet is ahead of the research.

In 2015, Ebonie Rio and colleagues published a study in the British Journal of Sports Medicine on volleyball players with patellar tendinopathy — jumper's knee. A single session of isometric holds, five of them at 45 seconds each, at 70 to 80% of maximum effort with the knee bent to sixty degrees. Pain dropped 6.8 points on a ten-point scale immediately afterwards, against 2.5 points for the same players doing conventional moving repetitions, and the relief was still there 45 minutes later.

That is a spectacular result, and it travelled. Within a couple of years isometric holds were being recommended everywhere as an analgesic — hold this for 45 seconds and the pain turns off.

Then people tried to repeat it. A 2020 systematic review and meta-analysis in BMJ Open Sport & Exercise Medicine gathered ten randomised trials and 294 participants across patellar, rotator cuff, lateral elbow, Achilles and gluteal tendinopathy. The picture it found was not the one the headlines had promised. Rio's own follow-up trial two years later produced 1.8 points against 0.9 for moving exercise — a real drop, a fraction of the original gap. A 2020 trial by Holden found 0.8 against 1.1, with the moving exercise slightly ahead. And the one study of the immediate effect in tennis elbow found that pain went up after the isometric holds, not down.

The reviewers' conclusion was that isometric exercise does not appear to be superior to moving exercise in managing chronic tendinopathy, on limited evidence. They did not say it was useless — they said it can reasonably be part of a progressive loading programme and may suit some people. What they could not find was the switch.

Why the painkilling effect is weakest in the people most interested in it

There is a real mechanism underneath the claim, and it is worth understanding precisely, because the precision is where the disappointment gets explained.

After a bout of exercise, people become measurably less sensitive to pain for a while. It is called exercise-induced hypoalgesia, it has been demonstrated repeatedly in laboratories, and isometric holds are a reliable way to produce it — loads as light as 10 to 30% of maximum will do it, provided the hold goes on long enough.

Almost all of that work was done in people who do not have chronic pain. When a 2021 systematic review in The Journal of Pain looked separately at people who do, isometric exercise did not produce the effect at all in chronic musculoskeletal pain — three studies, 114 participants, no measurable change in pain sensitivity. The picture varies by condition rather than being uniformly absent: it shows up in shoulder pain and does not in fibromyalgia. Where it does appear in chronic low back pain, it tends to be local to the muscles that worked rather than felt all over. And a higher degree of catastrophising — the thought pattern where pain feels like it can only get worse — predicts a smaller response, which is a cruel finding given who is most likely to have it.

This is the paragraph to keep if you keep only one. The effect is real. It is smaller in you than in the healthy volunteer whose data produced the article recommending it to you, and in some conditions it is not there at all. Go in planning on strength, and treat any pain relief as a bonus rather than the reason you showed up — because if relief is the reason you showed up, one unremarkable fortnight will end the whole thing.

What they are genuinely good for, and where they come last

Strength is the honest answer, with a caveat about ranking.

The clearest look at that ranking comes from a network meta-analysis in PLOS One of three kinds of strengthening for knee osteoarthritis, covering twelve trials and 753 people. It compared isometric work against isotonic work — moving the joint under load, which is ordinary weight training — and isokinetic work, which needs a machine in a clinic that controls the speed of the movement.

Isometric training finished last for pain, scoring 35.0% against 80.9% for isotonic and 83.8% for isokinetic. It finished last for knee extension strength too, at 26.1%. It placed second for physical function, which is the one measure where holding a position seems to hold its own.

But all three beat conventional therapy on its own. Read the ranking and that comparison together and the practical rule falls out by itself: isometric strengthening is the weakest of the three methods, and it is the only one many people can actually start with. Isokinetic training needs a machine and an appointment. Isotonic training needs a joint that will move under load without punishing you for it. Isometric training needs a wall.

So its honest place is at the beginning and at the bottom — the thing you do when the joint is too sore, too swollen or too recently operated on for anything else, and the thing you graduate out of when it is not. That is precisely why the quadriceps set is the first exercise nearly every physiotherapist in Canada teaches after a knee problem, and it is why nobody's rehabilitation should still be only quad sets six months later.

The exercises

None of these needs equipment, and all of them can be scaled down to nothing. The rule for every one is the same: pick a position that does not hurt, build the tension gradually over two or three seconds rather than snapping into it, and let it go gradually too.

How hard, and for how long

There are two doses here for two different jobs, and they are not interchangeable.

For blood pressure, the dose is light and long: about 30% of your maximum effort, held for two full minutes, four times with a minute of rest between, three sessions a week for at least eight weeks. Thirty per cent is lighter than most people assume — roughly the tension you would use to hold a full mug steady. If you cannot last two minutes, you are pushing too hard.

For strength, the dose is shorter and harder: holds of ten to forty-five seconds at somewhere around two-thirds of your maximum, five to ten of them, most days of the week. Muscle gains from isometric work are largely specific to the angle you trained at, give or take about twenty degrees either side, so if you have a range you can use, work two or three positions in it rather than one.

For a joint that is currently angry, the dose is gentle and frequent: short holds at low effort, several small sessions through the day rather than one long one. A quadriceps set does not need to be hard to be worth doing.

Whichever you are doing, the next day tells you whether you got it right. Stiffness or mild soreness that settles within a day is normal and is not damage. Pain that is worse than your baseline two days later means the dose was too high — halve it and go again rather than stopping altogether.

Breathing is the part that goes wrong

The genuine risk in isometric exercise is not the muscle or the joint. It is what people do with their breath.

The instinct during a hard sustained effort is to take a breath and bear down on a closed throat — the Valsalva manoeuvre, the same thing you do lifting a heavy box or straining on the toilet. It sends blood pressure climbing steeply for as long as it goes on, and the rise is more pronounced in older adults than younger ones. That is an odd risk to be carrying in an exercise you took up partly to lower your blood pressure, and it is entirely avoidable.

The fix is a single rule: if you cannot talk, you are doing it wrong. Count the seconds out loud through every hold. Out loud is the whole trick — it is impossible to hold your breath and count at the same time, so the counting enforces the breathing without you having to think about it.

Getting them to actually happen

The reason an exercise programme fails is almost never the exercises. Isometrics have one large advantage here and one hidden disadvantage, and it is worth naming both.

The advantage is that they attach to things you already do. The kettle takes two and a half minutes to boil, which is a wall sit with time to spare. An ad break is four quadriceps sets. Being on hold to a call centre is grip squeezes, and you cannot be seen doing them. The five minutes between waking and deciding whether today is a good day can be glute squeezes and quad sets, done lying down, before the day has had a chance to make its case.

The disadvantage is that because they are invisible and undramatic, they are unusually easy to skip and unusually hard to notice progress in. Nothing gets heavier. Nothing looks different. So write down what you can do on day one — how many seconds the wall sit lasted, which hole your belt is on, how many stairs before the knee complains — because in six weeks that note will be the only evidence you have, and without it you will conclude nothing happened.

On a bad run of days, hold the floor rather than the ceiling. One quadriceps set beats the programme you skipped because you could not face all of it, and our flare-up guide is built around exactly that decision. The same pacing logic that applies to walking applies here — there is more on it in our piece on daily living and pacing.

An exercise you can do on your worst day is worth more than a better one you manage only on your best.

Where this sits in Canadian care

The Canadian 24-Hour Movement Guidelines ask adults for muscle-strengthening activity at least twice a week, alongside the aerobic minutes everyone quotes. Isometric work counts towards the strengthening half, and for a great many people in pain it is the only thing that will.

If you can get in front of a physiotherapist, do — a person who watches you do these will correct the angle, the effort and the breathing in ten minutes, and none of those three can be corrected by a table. Outpatient physiotherapy is not covered by provincial health insurance for most adults in most provinces, though several run publicly funded programs for people on low incomes, over 65, or recently discharged from hospital; it is worth asking your provincial health line rather than assuming. If your problem is an arthritic knee or hip, the GLA:D program is the education-and-exercise route with the best Canadian evidence behind it, and Arthritis Society Canada can point you at services in your province. Pain BC runs free coaching and online programs that are open to people outside British Columbia.

And treat all of this as a floor rather than a ceiling. Isometric holds are where you start when moving hurts; they are not where anybody should finish. When the joint tolerates more, it wants more — our morning mobility routine is the natural next step, tai chi adds movement without impact, and the walking build-up exists for when you are ready to go outside with it.

Giving them a fair trial

Eight weeks, and decide the terms before you start.

Pick one job. Blood pressure, or a specific muscle you know is weak — not both, because the doses conflict. Pick two or three exercises from the table rather than twelve, and choose them for the job rather than for variety. Write down the starting measurement: a home blood pressure reading taken at the same time of day on a validated monitor, or the seconds, stairs and distances that are your daily arithmetic.

Then hold the schedule for eight weeks without judging it, because neither blood pressure nor muscle gives you an answer in a fortnight. Re-measure at week eight against what you wrote down, not against your memory of how last month felt.

If the numbers moved, you have found something you can keep doing for nothing, forever, in a chair. If they did not, you have spent twelve minutes three times a week finding that out, which is the cheapest failed experiment in this whole field — and the muscle you built while running it is still yours.