A study involving 1.4 million adults found that nearly six in 10 people with high blood pressure were unaware of their condition, while separate research suggests regular wall sits may significantly reduce blood pressure without specialized equipment.
By yourNEWS Media Newsroom
Millions of adults may be living with dangerously elevated blood pressure without knowing it, according to a major new study that found nearly 60% of affected participants had never received a diagnosis or treatment. The findings raise concerns about missed opportunities to prevent heart attacks, strokes and other cardiovascular complications, including among younger adults who may not undergo routine screening.
Researchers at the University of Oxford analyzed blood pressure measurements from 1,428,494 adults participating in Our Future Health, one of the world’s largest health research programs. The study, published Sept. 23 in BMJ Public Health, found that 37.2% of participants met the criteria for hypertension, while 58.8% of those with the condition had not previously been identified as having high blood pressure.
The research also revealed substantial gaps in treatment effectiveness. Among participants already taking blood pressure medication, 50.2% continued to record readings of 140/90 or higher, suggesting that many patients require additional monitoring, treatment adjustments or other interventions to achieve adequate control.
The findings were based on measurements collected between 2022 and 2025 at more than 200 enrollment centers across England. Researchers defined hypertension as a systolic reading of at least 140 millimeters of mercury, a diastolic reading of at least 90, or reported use of medication to lower blood pressure.
Although elevated readings were increasingly common with age, the study found that hypertension was not confined to older populations. Approximately 15.3% of adults younger than 40 met the study’s definition, demonstrating that cardiovascular risk factors can emerge decades before people typically begin receiving routine age-based health screenings.
Men had substantially higher rates of hypertension than women after adjusting for age, with prevalence estimated at 41.9% compared with 28.6%. Rates also increased with body mass index, reinforcing existing evidence connecting excess body weight with elevated blood pressure.
The University of Oxford’s announcement of the findings highlighted concerns that existing screening and treatment practices are failing to identify large numbers of people who could benefit from earlier intervention.
Wenyu Liu, a medical statistician at Oxford Population Health and the study’s lead author, questioned whether current approaches adequately address the scale of the problem.
“While hypertension is largely a ‘silent killer’, the current approach to detecting and treating high blood pressure is not fit for purpose,” Liu said.
“This isn’t a problem confined to a particular group; it’s substantial across almost every demographic we examined. Even among younger adults, who currently aren’t eligible for an NHS Health Check, over 15% already had high blood pressure. This underscores the need for population-wide prevention strategies alongside targeted treatment for people at high cardiovascular risk.”
The results add to longstanding concerns about hypertension because most individuals experience no obvious symptoms while their blood pressure remains elevated. Without regular measurements, the condition can progress unnoticed for years, gradually increasing strain on the heart, blood vessels, kidneys and brain.
According to the British Heart Foundation’s guidance on hypertension, high blood pressure contributes to approximately half of heart attacks and strokes in the United Kingdom. The organization has estimated that millions of British adults remain unaware of their condition.
Persistently elevated pressure can damage artery walls, accelerate the development of cardiovascular disease and increase the likelihood of kidney problems, heart failure and certain forms of cognitive impairment.
Professor Bryan Williams, the foundation’s chief scientific and medical officer, said the Oxford findings demonstrate the importance of detecting hypertension before serious complications develop.
“This study paints a concerning picture of the scale of undetected high blood pressure in the UK, and the challenges of keeping blood pressure under control in those already receiving treatment,” Williams said.
“High blood pressure remains the leading modifiable risk factor for cardiovascular disease, linked to around half of heart attacks and strokes in the UK. The worrying reality is that millions of people are still living with the condition without knowing it and missing opportunities for early diagnosis and treatment.”
The researchers emphasized that their findings represent a cross-sectional assessment rather than a long-term evaluation of individual blood pressure patterns. Measurements collected during a single clinic visit may be influenced by temporary stress, physical activity or anxiety, sometimes referred to as the white-coat effect.
Consequently, an elevated measurement does not automatically establish a diagnosis of persistent hypertension. Repeated home readings or ambulatory monitoring can help clinicians determine whether blood pressure remains elevated outside a medical setting.
Nevertheless, the exceptionally large sample suggests that undetected and inadequately controlled hypertension remains a significant public health concern.
Researchers also questioned whether screening strategies that focus primarily on older adults provide adequate opportunities for prevention among younger people. In England, routine National Health Service health checks generally target adults ages 40 to 74, potentially leaving younger individuals without systematic assessments.
Iain Turnbull, a clinical research fellow at Oxford Population Health and general practitioner involved in the study, said the results reflect difficulties encountered in routine medical practice.
“Many patients with high blood pressure are undetected or are sub-optimally treated. There is a need for a more proactive approach to detection of high blood pressure and to consider initiation of treatment based on predicted risk of cardiovascular disease in addition to levels of blood pressure,” Turnbull said.
While the Oxford research highlighted gaps in identifying and treating hypertension, a separate clinical trial published in September examined whether a simple form of exercise could help lower blood pressure.
The study, published in BMJ Open Sport & Exercise Medicine, examined 100 adults with normal to high-normal blood pressure who participated in an eight-week investigation of isometric wall squats, commonly known as wall sits.
Unlike conventional squats, which involve repeatedly bending and straightening the knees and hips, wall sits require participants to maintain a seated position against a wall while keeping their muscles contracted.
Researchers assigned 80 participants to exercise groups and 20 to a control group. Those exercising initially completed four wall-squat holds separated by rest periods during three weekly sessions.
After four weeks, the exercise participants recorded an average reduction in systolic blood pressure approximately 9.5 millimeters of mercury greater than the control group.
The researchers then modified exercise frequency during the following four weeks to examine whether improvements could be maintained with fewer sessions.
Participants who continued performing wall sits three times weekly experienced the greatest reductions, with systolic blood pressure falling by nearly 14 points after eight weeks. Those who reduced their activity to one weekly session retained much of the improvement, while participants who stopped exercising experienced a reversal of their earlier gains.
The findings, described in a HealthDay report published Sept. 29, suggest that sustained isometric exercise could provide a practical method of supporting cardiovascular health.
“Even minimal engagement can help maintain significant benefits,” the researchers wrote.
The trial was relatively small and short, and participants generally had normal to high-normal blood pressure rather than severe hypertension. The results therefore do not establish that wall sits can replace prescribed medication or produce the same improvements in people with uncontrolled high blood pressure.
The findings nevertheless contribute to growing scientific interest in isometric exercise, which involves generating muscular tension without substantial joint movement.
Researchers believe repeated isometric contractions may influence blood vessel function and improve the body’s ability to regulate circulation. During a sustained contraction, blood pressure can temporarily rise, but regular training may eventually produce lower resting measurements.
A broader examination of isometric exercise and blood pressure has also identified wall sits and similar movements as potentially beneficial, although their effectiveness depends on exercise intensity, consistency and individual health conditions.
Other forms of physical activity remain important. Walking, cycling, swimming and resistance training can improve cardiovascular fitness, metabolic health and muscular strength while contributing to blood pressure management.
Nutrition also plays an important role. Diets emphasizing vegetables, fruits, beans, whole grains and other minimally processed foods can help provide potassium, magnesium, fiber and other nutrients involved in cardiovascular function.
Foods such as avocados, spinach, sweet potatoes, black beans, beets and arugula offer nutrients and naturally occurring compounds that may support healthy blood pressure. Potassium helps the body regulate sodium balance, while dietary nitrates found in vegetables such as beets can contribute to nitric oxide production, which helps blood vessels relax.
Reducing excess sodium intake, limiting heavily processed foods, maintaining a healthy weight and obtaining sufficient sleep are among the lifestyle measures recommended by cardiovascular organizations.
Certain herbal products have also attracted research attention. Hibiscus tea, garlic preparations and beetroot juice have demonstrated modest blood pressure effects in some clinical studies, although results vary and evidence remains insufficient to treat them as substitutes for established medical care.
Magnesium-rich foods may also support normal cardiovascular function, particularly when dietary intake is inadequate. However, high-dose supplements are not appropriate for everyone, and excessive potassium or magnesium intake can create complications for people with kidney disease or those taking certain medications.
Slow breathing exercises and stress management techniques may offer additional benefits by helping reduce sympathetic nervous system activity and supporting relaxation. Their effects are generally more modest and should be considered complementary to established treatment.
For individuals concerned about undetected hypertension, regular blood pressure monitoring remains one of the most practical preventive measures.
The British Heart Foundation recommends understanding blood pressure readings and using home measurements when appropriate to identify persistent elevations that may not be apparent during occasional medical visits.
An automated upper-arm monitor with an appropriately sized cuff is generally recommended for home monitoring. A common protocol involves taking two readings in the morning and two in the evening for seven days, then sharing the results with a healthcare professional.
Measurements should be taken while seated comfortably after several minutes of rest, with the arm supported at heart level. Avoiding exercise, caffeine and smoking shortly before testing can help improve consistency.
Blood pressure thresholds also vary among clinical guidelines. While the Oxford study used 140/90 as its definition, American guidelines classify readings beginning at 130/80 as stage 1 hypertension. A clinician can evaluate repeated measurements alongside age, medical history and other cardiovascular risk factors.
People already taking prescribed medication should continue treatment as directed rather than discontinuing it when readings improve. Lifestyle changes may reduce the need for medication in some circumstances, but adjustments should be made with medical supervision.
The combined findings point to two important considerations: hypertension frequently develops without warning, and effective long-term control often requires more than a single prescription or occasional measurement.
The Oxford study demonstrates that a substantial proportion of adults remain undiagnosed or inadequately treated, while the smaller exercise trial suggests that consistent, accessible physical activity may offer additional benefits.
Researchers continue to investigate how earlier screening, personalized treatment and sustainable lifestyle changes can reduce cardiovascular disease. For individuals of all ages, knowing their blood pressure and addressing persistent elevations remain central to preventing complications that may otherwise develop silently over many years.
Original article
Comments