Blood Pressure

Exercise and blood pressure: what happens during, and what happens after

Your reading climbs while you move, and the British Heart Foundation says plainly that this is normal. What the number does in the hours afterwards matters more, and so does when you put the cuff on.

NK Medically reviewed by Dr Nouman Kazmi, MBBS FCPS ·10 min read

Key Takeaways

The BHF puts it plainly on its high blood pressure page: your blood pressure naturally goes up and down throughout the day and night, and it’s normal for it to go up while you’re moving about. A high number taken mid-session isn’t telling you about your blood pressure. It’s telling you that you were moving.
Blood Pressure UK turns that into an instruction. Don’t measure within half an hour of eating, smoking, a caffeinated drink or exercising, because all four can raise a reading for a while.
There’s a measured dip in the hours afterwards, and it has a name. A 2016 meta-analysis of 65 studies found an average fall of 4.80 mmHg systolic and 3.19 mmHg diastolic, enough to pull a reading taken too soon below your real resting number. It showed up whatever the starting reading, whatever the exercise, and whether or not people were taking blood pressure medication.
The UK floor is lower than it sounds. The NHS asks for 150 minutes of moderate activity a week or 75 vigorous, plus two days of strengthening work, and it counts a brisk ten-minute walk towards the total.
Two cardiologists read the same 2023 review and came away with different answers on which kind of exercise is best. The disagreement is about what the study design will support, and both halves are below.
Walking isn’t the consolation prize. Across two large US cohorts followed for just over six years, walking and running produced similar reductions in the risk of newly diagnosed high blood pressure once the energy spent was matched.

In This Article

Why the number goes up while you move
What the number does in the hours afterwards
What the UK guidance actually asks for
Which kind is best, and where the experts split
Walking is the floor, and the floor is low
Frequently asked questions
The bottom line

Why the number goes up while you move

If you’ve ever had a reading taken at the gym, or put the cuff on while you were still getting your breath back from the stairs, you’ll have seen a number that looked alarming. It almost certainly wasn’t.

The British Heart Foundation says so on its high blood pressure page: your blood pressure naturally goes up and down throughout the day and night, and it is normal for it to go up while you are moving about.

Dr Anthony Komaroff, editor in chief of the Harvard Health Letter, puts the mechanism in one line. While you are exercising, your blood pressure and your pulse both go up, to supply the additional blood flow that your exercising muscles need. That rise is the delivery system doing what it’s been asked to do.

It also isn’t limited to the hard stuff. Dr Deepak Bhatt, a cardiologist and lecturer at Harvard Medical School and a former editor in chief of the Harvard Heart Letter, makes the scope explicit: when you perform any type of exercise, whether aerobic, strength training, stretching, or even balance exercises, both your blood pressure and heart rate increase to meet the greater demand for oxygen from your muscles. Tai chi and a sprint sit on the same spectrum. They don’t differ in kind, only in how far the number travels.

That matters for what you do with the number, because the thresholds everyone quotes aren’t built for a body in motion. The NHS counts blood pressure as high from 140/90 when a healthcare professional checks it, or 135/85 when you check it at home, and both of those assume you’ve been sitting still. A reading taken with your heart rate still up measures something else entirely.

Isometric work sits at the far end of that spectrum. Dr Arun Manmadhan, a cardiologist at Columbia University who works on hypertension and sports cardiology, notes that during an isometric hold, when the muscle is in its contracted state, blood pressure can rise quite significantly and temporarily. Dr Bhatt attaches a caveat: some research suggests isometric exercise may raise blood pressure more during the activity than dynamic exercise does, but the evidence isn’t conclusive.

4.80 mmHg

is the average systolic fall in the hours after a single exercise session, pooled across 65 studies. Diastolic averaged 3.19 mmHg. The 2016 meta-analysis that produced those figures, published in Arquivos Brasileiros de Cardiologia, found the drop held regardless of the starting reading, the type of exercise, the time of day, and whether participants were on blood pressure medication. Researchers call it post-exercise hypotension.

What the number does in the hours afterwards

Most writing about exercise and blood pressure is about the long game, the months of consistency, the resting reading in a year’s time. Underneath it sits a shorter effect that gets much less attention, and it’s the one that shows up on a home monitor this afternoon.

Carpio-Rivera and colleagues at the University of Costa Rica pooled 65 studies on the acute effect of a single session. On average, systolic came down 4.80 mmHg and diastolic 3.19 mmHg in the hours afterwards, both by enough that chance isn’t a likely explanation. In the paper those appear as corrected effect sizes of −0.56 and −0.44.

They sliced the data eight ways and the result didn’t really budge. The reduction stayed significant regardless of the participant’s initial blood pressure level, their sex, their physical activity level, whether they were taking antihypertensive medication, how the blood pressure was measured, what time of day it was measured, what type of exercise was performed, and which training programme was used. In their own summary: regardless of the characteristics of the participants and exercise, there was a reduction in blood pressure in the hours following an exercise session.

The falls were larger in men, in people not taking antihypertensive medication, in those who were already physically active, and when the exercise performed was jogging. Age and effect size were inversely correlated, so if you’re older the average dip is smaller. The paper also notes, citing earlier work rather than its own analysis, that mean reductions measured over a full 24 hours come out at about 3.2 mmHg systolic and 1.8 mmHg diastolic, with the biggest part concentrated in the first few hours.

So the number drifts in both directions around a workout, and that’s exactly why the timing advice exists. Blood Pressure UK’s pre-measurement guidance names exercising alongside eating, smoking and caffeinated drinks, with the same instruction for all four: don’t measure within half an hour, because these can all raise your blood pressure temporarily. Its reasoning is about the rise. The dip afterwards is the mirror image of the same problem, and it flatters the number instead of frightening you with it.

A fixed slot beats any amount of mental arithmetic. Blood Pressure UK asks for five minutes of sitting still before the cuff goes on, with your back supported, feet flat on the floor and your arm resting at the same height as your heart. If you pick one time of day and keep it, you stop having to work out what to subtract for the walk to the shops. You’re comparing like with like, which is the whole point of measuring at home.

None of this means a post-exercise reading is worthless. It just isn’t answering the question you think you’re asking. If you want to know what moving does to you, take one before and one an hour after, and write down both. If you want to know what your blood pressure is, take it the way you always take it, at the time you always take it, on a morning that looks like most mornings.

What the UK guidance actually asks for

The NHS physical activity guidelines for adults aged 19 to 64 are shorter than you’d expect, and the numbers in them are the ones every other UK page is quoting.

Adults should do some type of physical activity every day. The weekly target is at least 150 minutes of moderate intensity activity, or 75 minutes of vigorous intensity activity, with the NHS adding that 75 minutes of vigorous activity can generally give similar health benefits to the 150 moderate. On top of the aerobic half, you need strengthening activities that work all the major muscle groups, on at least two days a week. The NHS is clear those days don’t count towards the 150: muscle-strengthening exercises are not always an aerobic activity, so you’ll need to do them as well as your 150 minutes. It also asks you to spread the exercise evenly over four to five days a week, or every day, and to break up long periods of sitting or lying down.

Moderate intensity has a definition you can apply without a heart rate monitor, which is handy if you haven’t got one. It will raise your heart rate, make you breathe faster and feel warmer, and the test the NHS gives is whether you can still talk but not sing. Brisk walking is the first example on its list, next to water aerobics, riding a bike, dancing, doubles tennis, pushing a lawn mower, hiking and rollerblading. Vigorous activity makes you breathe hard and fast, and you won’t be able to say more than a few words without pausing for breath.

On the NHS’s own high blood pressure page, the activity line sits on a short do-list with diet and weight: exercise regularly, aiming to do at least 150 minutes of exercise a week. The British Heart Foundation approaches it from the other end, listing not getting enough exercise among the things that increase your risk, and its suggestions are deliberately ordinary. Commit to walking every day at lunchtime, try a new hobby, swap a short drive for a walk or a cycle. Not a gym membership between them.

The NHS puts one sentence before all of the above, and it belongs here too. Speak to your GP first if you have not exercised for some time, or if you have medical conditions or concerns, and make sure your activity and its intensity are appropriate for your fitness. Dr Manmadhan makes the same point about isometric work specifically: for someone with uncontrolled high blood pressure to begin with, or other pre-existing cardiovascular conditions, it may not be the safest or most optimal mode of exercise, and the answer is to talk to your doctor about what’s best. Any question about your medication, your dose or whether a particular activity is sensible for you is a question for the person who prescribes it.

One small piece of technique from Dr Bhatt, because it’s easy to miss. During strength training, breathe out as you lift, push or pull, and in as you release. People sometimes hold their breath to squeeze out more effort, and that sudden strain is what can make blood pressure spike. Counting out loud as you lift and release is a reliable way to remember, and it doesn’t matter how silly it sounds. He’s talking about heavy furniture and boxes of books as much as loaded barbells.

Which kind is best, and where the experts split

The short answer first. On both readings below, the types of exercise measured came out ahead of doing none, and Dr Komaroff puts it as plainly as anyone: choosing one of them is the best thing you can do for your health. The best kind is the kind you’ll still be doing in February.

The longer answer is a disagreement. In July 2023 the British Journal of Sports Medicine published a very large review of exercise and resting blood pressure, and two cardiologists writing for two institutions read it differently. We haven’t read the review itself, so both accounts below reach us second hand and are named as such.

Dr Komaroff, for Harvard Health, describes it as an analysis of nearly 300 randomised trials involving over 15,000 people, each one assigning participants either to a particular form of regular exercise or to no exercise for at least two weeks. Several types were evaluated, and the five he lists are aerobic training, high-intensity interval training, dynamic resistance training, isometric training, and combined training. His conclusion has two halves, and the second is the one that gets dropped. Each of these types was clearly effective at lowering resting blood pressure. And then: since none of the studies compared one type of exercise to another, but instead compared one particular type of exercise to no exercise, we can’t be sure which type of exercise is best.

“Since none of the studies compared one type of exercise to another … we can’t be sure which type of exercise is best at lowering blood pressure.”

Dr Anthony Komaroff, Harvard Health, October 2023

Dr Manmadhan, for ColumbiaDoctors, reads the same review and lands somewhere else. He describes it as an analysis of over 15,000 people in 270 clinical trials from 1990 to 2023, calls that very large, and reports that it found that almost all forms of exercise training led to lower blood pressure, and that the most effective form was isometric exercise training. On that basis he says he’ll recommend isometric training more specifically, particularly to patients who already have borderline or mildly elevated blood pressure, and for people who can’t or don’t want to do vigorous aerobic work.

The split is about what a review of this shape will support. If every trial inside it tested one exercise against doing nothing, then ranking the five against each other is an inference drawn across trials, not a result measured inside one. Dr Manmadhan draws that inference. Dr Komaroff holds back from it. The question is open, and nothing you do next depends on which of them turns out to be right.

If the isometric detail is what you came for, we have a separate piece that goes through the protocols in detail.

Walking is the floor, and the floor is low

Walking has a reputation as the gentle option, the one that doesn’t quite count. The evidence puts it higher than that, and so does the NHS.

Its walking page sets the bar at a brisk ten-minute daily walk, which it says has lots of health benefits and counts towards your 150 minutes of weekly exercise. Brisk means about three miles an hour, faster than a stroll, and the test is the same one: you can still talk but you can’t sing the words to a song. If you’re not very active but able to walk, it says to increase your distance gradually, and if your joints are a problem, to check whether your local pool holds exercise classes, because the water supports your joints while you move.

The comparison comes from two large US cohorts. Neither was a trial. Williams and Thompson used the National Runners’ Health Study and the National Walkers’ Health Study, 33,060 runners and 15,945 walkers, and followed them for 6.2 years to see who developed high blood pressure, high cholesterol, diabetes and coronary heart disease. Matched for the energy spent rather than the time taken, running was associated with a 4.2% lower risk of a new high blood pressure diagnosis, and walking with 7.2%. Their conclusion is that the same energy spent on moderate walking or vigorous running produced similar risk reductions. The walking advantage was only marginally greater, and not by enough to call it a real difference.

Two things about that study separate interesting from settled. The conditions were self-reported and physician-diagnosed, not measured by the researchers, and both cohorts were people who already walked or ran, so the comparison is between matched amounts of energy spent. Harvard’s Nutrition Source, reading the same cohort, adds one detail the abstract leaves out: the faster the walking pace, the greater the risk reduction observed.

And the floor may be lower still. Harvard Health reported a study published in Circulation in November 2024 that put activity trackers on 14,761 people for a full week. On average they slept about seven hours, spent nearly eleven hours sitting, three hours on their feet, an hour and a half strolling, just over an hour walking fast, and sixteen minutes doing anything the researchers would call exercise. Which is to say the exercise was the smallest slice of the day by a long way, and the sitting was the largest. That’s most of us. After adjusting for things like age and smoking, replacing any less active behaviour with five minutes of exercise a day was associated with systolic blood pressure 0.68 mmHg lower and diastolic 0.54 mmHg lower. More time produced more. The study authors calculated that swapping sedentary time for 20 to 27 minutes of exercise a day could reduce cardiovascular disease by up to 28% at the population level.

Those per-five-minute numbers are small, and they’re printed here at their real size. What they establish is that there’s no threshold you have to clear before any of it counts. Dr Manmadhan’s advice to patients who find the whole idea off-putting is to start by aiming for just five to ten minutes a day, on the grounds that a few minutes is enormously beneficial and better than doing nothing.

So the eleven hours is where the room is. The biggest change available isn’t a harder workout, it’s breaking that up more often.

Matter BP Tracker

One week of walking isn’t a trend. Six is.

The changes on this page are a few mmHg at a time. That’s too small for any single reading to show you, and about the right size for six or eight weeks of them. The Matter BP Tracker keeps the number, the date and the note you write next to it, so the morning after you started walking is still there in two months, with your note on it. Your GP gets handed a pattern with its odd days explained.

Open the BP Tracker → Readings and notes·Charted over weeks

Frequently asked questions

Is it normal for blood pressure to go up during exercise?

Yes. The British Heart Foundation says so on its high blood pressure page: your blood pressure naturally goes up and down throughout the day and night, and it’s normal for it to go up while you’re moving about. Dr Anthony Komaroff of Harvard Health gives the reason, which is that your blood pressure and pulse rise together to supply the extra blood flow your exercising muscles need. Dr Deepak Bhatt notes it happens with every type of exercise, aerobic work, strength training, stretching and even balance exercises, because all of them increase the demand for oxygen. The UK thresholds, 140/90 at a surgery and 135/85 at home, are resting figures, so a number taken while you’re still warm isn’t measuring the same thing.

How long should I wait after exercise before taking a reading?

Half an hour, on Blood Pressure UK’s guidance. It names exercising alongside eating, smoking and caffeinated drinks such as coffee, and asks you not to measure within half an hour of any of the four, because they can all raise your blood pressure temporarily. It also asks for five minutes of sitting still immediately before the reading, back supported, feet flat on the floor and your arm resting at the same height as your heart. There’s a second reason to wait that the guidance doesn’t mention: the hours after exercise carry a measured dip, so a reading taken soon afterwards can come out below your usual resting number.

How much exercise does the NHS recommend?

150 minutes a week of moderate activity, or 75 of vigorous. On top of that, you need strengthening work on at least two days a week, covering all the major muscle groups. The NHS is explicit that those strengthening days are extra, because muscle-strengthening work isn’t always aerobic. It also asks you to do some activity every day, to spread the week’s exercise over four to five days or every day, and to break up long stretches of sitting. On its high blood pressure page the same 150-minute figure appears on a short list with eating well and losing weight if you’re overweight.

Is walking enough, or do I need to run?

Walking counts. One large study suggests it may do more of the job than its reputation implies: Williams and Thompson followed 15,945 walkers and 33,060 runners for 6.2 years, and matched for the energy spent, running was associated with a 4.2% lower risk of a new high blood pressure diagnosis and walking with 7.2%. Their conclusion was that the two produced similar risk reductions. The walking edge was only marginally greater, at a p-value of 0.06, and the conditions were self-reported, so treat the two as similar rather than better. The NHS sets its own bar at a brisk ten-minute daily walk, which it counts towards your 150 minutes. Brisk means roughly three miles an hour, and the test is that you can talk but not sing.

Does strength training raise blood pressure, and is it safe if mine is high?

It raises it during the set, like every other kind of exercise. Dr Deepak Bhatt, writing for Harvard Health, says that if your blood pressure is well controlled and you’re otherwise healthy, most types of strength training including weight lifting are generally considered not only safe but beneficial, with precautions. The precautions are specific. People whose blood pressure isn’t optimally controlled should be cautious about lifting very heavy weights, and he includes heavy furniture and boxes of books rather than only barbells, because a sudden intense effort can make blood pressure spike. Breathe out as you lift, push or pull, and in as you release, because holding your breath is what people tend to do when they’re straining. Whether it’s right for you specifically is a question for your GP, and the NHS asks you to speak to one first if you haven’t exercised for some time or you have other conditions.

Which type of exercise is best for blood pressure?

This is genuinely unsettled. One 2023 review in the British Journal of Sports Medicine found almost every form of exercise training associated with lower blood pressure, and two cardiologists reading it disagree about whether it can rank isometric training first, because none of the trials inside it compared one exercise type against another. Dr Arun Manmadhan of Columbia reads it as naming isometric work the most effective form. Dr Anthony Komaroff of Harvard Health reads the design as unable to say. The section above has both readings in full. The point they agree on is the one you can use: the types measured beat doing nothing, so the practical answer is whichever one you’ll keep doing.

The bottom line

Your blood pressure going up while you exercise is the circulatory system doing its job, and the BHF says so on the page you’ll probably land on when you first get a high reading. The rise is temporary, it happens with every kind of activity including the gentle ones, and it doesn’t tell you anything about the resting number the thresholds are built around.

What follows the session is well documented. Across 65 studies, the average was a fall of 4.80 mmHg systolic and 3.19 mmHg diastolic in the hours afterwards, holding across both sexes, different exercise types and people on and off medication. That’s why Blood Pressure UK’s half-hour rule puts exercising next to coffee and cigarettes. A reading taken too close to a workout is measuring the workout, in one direction or the other.

The guidance underneath all of it is modest and specific. 150 minutes of moderate activity a week, or 75 vigorous, two days of strengthening work, spread across the week, and a GP conversation first if you’ve been inactive or you have something else going on. A brisk ten-minute walk counts. Whether isometric work beats the rest is still unsettled, and you don’t need it settled to start, because every type measured in that review came out ahead of doing nothing. Pick the one you’ll keep, measure at the same time each day, and give it six to eight weeks before you read anything into the line.

Continue Learning

References

NHS. Physical activity guidelines for adults aged 19 to 64. Page last reviewed 22 May 2024. Available at: nhs.uk
NHS. Walking for health. Page last reviewed 15 December 2022. Available at: nhs.uk
NHS. High blood pressure (hypertension). Page last reviewed 19 July 2024. Available at: nhs.uk
British Heart Foundation. High blood pressure (hypertension): causes and symptoms. Page updated 31 March 2026. Available at: bhf.org.uk
Blood Pressure UK. How to measure your blood pressure at home. Available at: bloodpressureuk.org
Carpio-Rivera E, Moncada-Jiménez J, Salazar-Rojas W, Solera-Herrera A. Acute Effects of Exercise on Blood Pressure: A Meta-Analytic Investigation. Arq Bras Cardiol. 2016 May;106(5):422–433. doi:10.5935/abc.20160064. Available at: pmc.ncbi.nlm.nih.gov
Williams PT, Thompson PD. Walking versus running for hypertension, cholesterol, and diabetes mellitus risk reduction. Arterioscler Thromb Vasc Biol. 2013 Apr 4;33(5):1085–1091. doi:10.1161/ATVBAHA.112.300878. Available at: pmc.ncbi.nlm.nih.gov
Komaroff AL. How does exercise affect blood pressure? Harvard Health Publishing, 1 October 2023. Available at: health.harvard.edu
Manmadhan A. The Best Exercise to Lower Your Blood Pressure? It’s Not What You Think It Is. ColumbiaDoctors, 26 October 2023. Available at: columbiadoctors.org
Bhatt DL. Strength training and blood pressure. Harvard Health Publishing, 1 August 2021. Available at: health.harvard.edu
Corliss J, reviewed by Cannon CP. To lower blood pressure, even five minutes of exercise helps. Harvard Health Publishing, 1 February 2025, reporting a study published in Circulation on 6 November 2024. Available at: health.harvard.edu
Harvard T.H. Chan School of Public Health, The Nutrition Source. Walking for Exercise. Available at: nutritionsource.hsph.harvard.edu

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