What is a normal blood pressure — and what should you actually be aiming for? The honest answer is that there is no single healthy blood pressure target that fits everyone. The right number depends far more on frailty than on age, and getting it wrong in either direction carries real risk. Here's what the evidence says, and how to work out the target that's right for you.
Start with a story. Two people can walk into a clinic with almost exactly the same blood-pressure reading — and for one it is good news, while for the other it is the reason they are in a cast. Take a man in his mid-forties. His monitor says 118 over 76, and he's frightened: his father had a heart attack at fifty, he's been reading online that anything creeping toward 120 is a warning sign, and he's convinced something is quietly going wrong inside him. Now take a woman in her eighties. She's on two blood-pressure tablets, and her reading is a tidy 120 over 80 — the exact number everyone is told to aim for. Last month she stood up out of a chair, the room went grey, and she went straight down. She broke her wrist.
Same number. For him it's a gift; for her it's a hazard. And this isn't really a story about old people. That frightened man in his forties is almost anyone, right now. The woman in the cast is almost anyone, or their parents, in thirty years. What decides which one you are isn't the number of birthdays — it's something called frailty. This article walks through both ends of the tightrope, and what to actually do about your own number.
Table of Contents
- Why lower blood pressure at all?
- Who was in the SPRINT trial — and is your 120 really 120?
- Is aiming under 120 better? The 2024 ESPRIT trial
- Blood pressure and falls in older adults: frailty, not age
- Is a low blood pressure good? The young end of the scale
- How to measure blood pressure at home correctly
- How to lower blood pressure without medication
- What blood pressure target should you ask your doctor about?
- The bottom line: your target isn't one number
- References
Why lower blood pressure at all?
To see why one identical number can mean opposite things, start with the question both of those patients are really asking: why chase this number at all? The answer is simple — less pressure on the vessels means fewer heart attacks and strokes. (One note before going further: this article is educational and is not a substitute for medical advice — anyone should speak with their own doctor before changing their blood pressure treatment or medication.)
The trial that made “lower” the goal was SPRINT, published in 2015. In 9,361 high-risk adults, aiming for a systolic under 120 beat aiming for under 140 on hard outcomes: the intensive group had 1.65% of patients per year suffer a major cardiovascular event, versus 2.19% per year in the standard group — a hazard ratio of 0.75 — and lower all-cause death, at a hazard ratio of 0.73 [1].
That is often written up as a “27% reduction,” but it's worth being straight about the numbers, because the relative figure always sounds bigger than what a person actually feels. In plain terms, it's about half a percentage point fewer events per year. Put another way: you'd treat roughly 61 people to prevent one cardiovascular event, and about 90 to prevent one death, over the three-and-a-bit years of the trial [1]. It's a real benefit — but a modest one, and anyone quoting the 27% without that context is only telling half the story.
One quick bit of precision, because it trips everyone up. The famous “120 over 80” isn't a target — it's the ceiling of normal blood pressure. Once someone is actually being treated, the guideline number doctors aim for is under 130 over 80. So “aim for under 120” refers to a specific, high-risk group in a specific trial — not a rule for everybody. It sounds settled — so why isn't the answer just “everyone aim for 120”? The first catch is who was actually in that trial.
Who was in the SPRINT trial — and is your 120 really 120?
Before anyone takes that number to heart, two things buried in the fine print completely change what it means for them.
The first is the exclusions. SPRINT deliberately left out the exact people who are often most worried. No one with diabetes. No one with a prior stroke. And not the frail [1]. So the headline result was never tested on some of the people most likely to be reading about it.
The second is the measurement — the single most common question on this topic. SPRINT measured blood pressure with an automated device while the patient sat alone in a quiet room, and that reads about 5 to 10 mmHg lower than the cuff on a doctor's wall [2]. So the trial's “under 120” isn't the “under 120” seen in clinic — a point that matters enormously once it comes to measuring a blood pressure number properly at home.
Is aiming under 120 better? The 2024 ESPRIT trial
So does “lower is better” hold up once the diabetics and stroke patients SPRINT excluded are added back? The newest and largest trial did exactly the one thing SPRINT wouldn't — it let the sicker patients in.
ESPRIT, published in The Lancet in 2024, enrolled 11,255 patients, this time including people with diabetes and prior strokes. And aiming under 120 still won — on events (hazard ratio 0.88), on cardiovascular death (0.61), and on death from any cause (0.79) [3]. It's the biggest, freshest piece of evidence in this whole debate, and it points the same direction as SPRINT.
To keep this honest rather than cherry-picked, here's the counter-example. Back in 2010, ACCORD tried the same under-120 target in people with type 2 diabetes and missed its primary outcome: a hazard ratio of 0.88 with a p-value of 0.20, although strokes did fall [4]. The best read is that it was underpowered — ESPRIT later showed the benefit — but it's only fair to name it. So if aiming lower keeps winning — in the fit, in the frail-ish, in diabetics, in stroke survivors — why would anyone ever need to aim higher? Because there's a second cliff, and it's on the other side of the road.
Blood pressure and falls in older adults: frailty, not age
Push the wrong person's pressure too low, and the result isn't a prevented stroke. It's a fall. This is the part about parents — and about everyone, later. Watch how the target flips.
The mechanism is plain enough. In a frail older person, drop the pressure, they stand up, blood doesn't reach the brain fast enough, they go grey and go down — and a broken hip is not a small event. The numbers behind each link in that chain are sobering. In frail nursing-home residents over 80, those with a systolic under 130 who were on two or more blood-pressure drugs had a 78% higher risk of dying over two years [5]. A meta-analysis of about fifty thousand people found that orthostatic hypotension — the blood-pressure drop on standing — carried a 73% higher odds of falling [6]. And a broken hip itself carries a one-year mortality of around 20 to 30 percent [7].
There's a floor at the bottom number too. The coronary arteries fill during diastole, so if the bottom number drops too far — below about 60 — it may starve the heart's own blood supply. That's the so-called J-curve. But it's worth being careful here: this shows up in observational data, not proven cause-and-effect [8].
And here's the part almost everyone gets wrong — including plenty of doctors. This is not about age. When the trials looked at their own fittest patients over seventy-five — the ones sent for the under-120 target — those people still got the benefit (hazard ratio 0.66 for events, 0.67 for death), and they did not fall more than anyone else (4.9% versus 5.5%) [9]. So the falls story was never really an age story. It's a frailty story: not that a birthday flips the target, but whether the body has become fragile. The honest boundary is worth stating out loud — the falls-and-over-treatment harm rests on observational data in frail people, while the trials studied relatively fit elders. So the rule is “frailty, orthostatic symptoms, tolerance,” never “old means aim higher.”
Picture that woman again. Somewhere along the way, someone added a second tablet to push her pressure down to the number on the chart. And then nobody ever went back to ask whether she still needed it — not after she lost a little weight, not the first time she felt dizzy standing up. Her reading looked perfect right up until the morning it put her on the floor. The target was the only thing anyone was watching. She was the thing they missed.
Is a low blood pressure good? The young end of the scale
Now the good news — and it's for that worried man from the very start. For someone younger whose reading is low, this is the moment to relax.
The risk here is continuous — there's no magic safe threshold. Across about a million adults, cardiovascular death roughly doubles for every 20 points of systolic pressure, all the way down to 115 over 75 [10]. A lower number simply tracks with lower lifetime risk.
And a lifetime of lower pressure beats anything a three-year trial can show. Genetic data suggest that lifelong lower blood pressure compounds into dramatically lower lifetime cardiovascular risk [11]. One honest guard on that, though: this is lifelong exposure, effectively from birth — not the effect of a pill started in mid-life. So two ends of one tightrope. How does anyone find their footing on it? Here's the framework.
How to measure blood pressure at home correctly
Before arguing about whether a target should be 120 or 130, here's the uncomfortable truth: most people are chasing a number that's simply wrong. The white-coat effect and bad cuff technique wreck the reading, and the number on the machine may not be the real number. In fact the doctor's office is often the worst place to measure it — for many people the reading jumps just from being there, which is exactly why the guidance now says to measure blood pressure at home, where it's real, before anyone decides the target [12].
The good news is that this part is fully within a person's control. Sit quietly for five minutes first; back and feet supported, arm resting at heart level, the right cuff size, no talking, empty bladder, and no coffee or exercise for half an hour beforehand [12].
And don't trust one number. The protocol that works is two readings, morning and evening, for a week — then throw out the first day and average the rest [13]. Decisions rest on that average, never on one alarming reading.
Technique matters more than people think, because bad technique doesn't just add noise — it biases the number upward, toward over-diagnosis and over-treatment. Get these wrong and the number lies, almost always too high. Talking during the reading can add up to nineteen points; letting the arm hang can add over twenty; a full bladder, crossed legs, the wrong cuff — each quietly inflates it [14]. Those are ranges across studies, not fixed values, and they push the number in one direction: up.
How to lower blood pressure without medication
Once the number is real, it becomes possible to find a spot on that tightrope — and there's a surprising amount a person can do to lower blood pressure without medication. Think of it as a simple two-way sort. Younger, tolerates a low reading, no dizziness on standing? Aiming lower is fine. Frail, falls, symptomatic drops on standing, or a very low bottom number with heart disease? That points toward a softer, higher target.
Then there are the lifestyle levers, all evidence-based and prescription-free. Pooling 270 randomised trials, aerobic exercise lowered systolic pressure by about four and a half points, while isometric holds — think wall-sits — came out on top at roughly eight points [15]. The isometric figure deserves a careful flag: it's the biggest number but rests on the smallest, shortest trials with no heart-attack-or-stroke outcome data yet, so it's best treated as a promising, time-cheap option rather than proven event reduction — aerobic exercise is the one carrying the hard-outcome evidence. Every kilogram of weight lost drops systolic pressure by about one point, so a five-kilo loss is worth roughly four to five points [16]. Cutting salt by about four grams a day lowers systolic pressure by just over four points — and about twice that in people who already have high blood pressure [17].
The DASH eating pattern — where the original trial actually provided the food — lowered systolic pressure by 5.5 points overall, and 11.4 points in people who started with hypertension [18]. In people drinking six or more drinks a day, cutting back by about half lowered systolic pressure by five and a half points [19]. And eating more potassium — the fruit-and-vegetable side of DASH — lowered systolic pressure by about three and a half points in people with high readings [20]. One important framing point: these effects are not simply additive. Treat each as “roughly this much on its own,” the combination as “meaningfully more, but you can't just add them up” — and note the effects are consistently larger in people who start with high blood pressure.
There's one hard catch in that whole list. Potassium is dietary and doctor-guided — never a supplement to self-prescribe. For anyone on certain blood-pressure pills, such as ACE-inhibitors or ARBs, or with kidney problems, loading up on potassium can push it dangerously high [21]. That one is a conversation with a doctor, not a supplement to add on one's own. But everything else here can start today. Put simply: every point taken off with your own two feet is a point a pill doesn't have to.
What blood pressure target should you ask your doctor about?
This last step is where a patient stops being a passenger and starts advocating for themselves. The questions to bring are simple: “Given my age, my risk, and how I tolerate it — what's the right target for me?” “Am I getting dizzy standing up on this dose?” And, if things have changed: “If I've lost weight or my health has shifted, should we reassess?”
And if asking feels awkward, it's worth knowing that individualising the target is mainstream, not fringe — the guideline bodies themselves disagree. The 2017 American guidelines set the treatment target at under 130 over 80 [22]. Another major body — the American College of Physicians and the family-medicine group — argued for a more relaxed under-150 in people over 60, and told doctors to individualise [23]. When the experts openly disagree, a patient has every right to ask where they personally land.
One caution, and it's the only real “don't” in the whole topic: don't change prescription doses alone. The target is worked out together with a doctor. But everything else here — measuring the number properly, walking, the salt, the potassium-rich food — is available to start today.
The bottom line: your target isn't one number
Remember the two patients? The man in his forties, staring at 118 over 76 and bracing for bad news — he can breathe. For him, that low number is a head start, and the worst thing he could do is treat it like a disease. And the woman in the cast? Her family should walk into her next appointment and ask one simple question: given how she's doing now, is this still the right target — and does she still need both tablets?
Here's where the evidence lands. The right blood-pressure number isn't printed on a chart. It's the balance between the strokes that are prevented and the falls that are caused. The evidence is clear that high blood pressure should be treated — that part isn't really up for debate. What's individual is the target.
So it comes down to three things. Make sure the number is real — measure it properly, at home. Pull the levers that are genuinely within reach. And bring one question to the doctor: what's the right blood pressure target for me?
References
1. https://www.nejm.org/doi/full/10.1056/NEJMoa1511939
2. https://www.ahajournals.org/doi/10.1161/HYPERTENSIONAHA.117.10479
3. https://www.thelancet.com/journals/lancet/article/PIIS0140-6736(24)01028-6/fulltext
4. https://www.nejm.org/doi/full/10.1056/NEJMoa1001286
5. https://pubmed.ncbi.nlm.nih.gov/25685919
6. https://doi.org/10.1016/j.jamda.2018.11.003
7. https://doi.org/10.7326/0003-4819-152-6-201003160-00008
8. https://pmc.ncbi.nlm.nih.gov/articles/PMC10978147/
9. https://jamanetwork.com/journals/jama/fullarticle/2524266
10. https://doi.org/10.1016/S0140-6736(02)11911-8
11. https://doi.org/10.1001/jama.2019.14120
12. https://doi.org/10.1161/HYP.0000000000000087
13. https://doi.org/10.1161/CIR.0000000000000803
14. https://pubmed.ncbi.nlm.nih.gov/27977471
15. https://doi.org/10.1136/bjsports-2022-106503
16. https://doi.org/10.1161/01.HYP.0000094221.86888.AE
17. https://pubmed.ncbi.nlm.nih.gov/23558162
18. https://doi.org/10.1056/NEJM199704173361601
19. https://doi.org/10.1016/S2468-2667(17)30003-8
20. https://pubmed.ncbi.nlm.nih.gov/23558164
21. https://ods.od.nih.gov/factsheets/Potassium-HealthProfessional/
