A simple squeeze test predicts death risk better than blood pressure, research shows

It takes about as long as a handshake. A patient squeezes a handheld device called a dynamometer, the clinician notes the number, and in that single moment a surprising amount of information about the patient's likely future — their risk of heart attack, stroke, dementia, falls, and early death — has just been captured. A growing body of research now suggests that grip strength, long used by physical therapists to track frailty in older adults, is one of medicine's most powerful predictors of longevity, often outperforming the blood pressure cuff that hangs in every exam room.

The most influential evidence comes from the Prospective Urban Rural Epidemiology study, known as PURE, which tracked close to 140,000 adults between the ages of 35 and 70 in 17 countries — ranging from Canada and Sweden to India, China, Colombia, and Zimbabwe — over a median follow-up period of four years. Each 5-kilogram reduction in grip strength was associated with a 16 percent increase in the risk of death from any cause and a 17 percent increase in the risk of dying from cardiovascular disease. The same 5-kilogram drop was tied to a 7 percent greater chance of heart attack and a 9 percent greater chance of stroke. Grip strength predicted mortality more strongly than systolic blood pressure — the standard screening measure doctors have relied on for generations.

Grip strength could be an easy and inexpensive test to assess an individual's risk of death and cardiovascular disease.— Darryl Leong, director of the McMaster University and Hamilton Health Sciences cardio-oncology program and lead author of the PURE study

The PURE study, published in The Lancet, was designed specifically to test whether health findings from wealthy nations hold up in poorer ones. After accounting for income level, education, employment status, physical activity, diet, tobacco use, and alcohol use, grip strength's link to mortality remained intact, the Population Health Research Institute at McMaster University, which ran the study, reported. That the relationship survived adjustment for so many confounding variables — and did so across vastly different health systems and economies — is what made the size of the association notable even to the investigators themselves.

Later research has reinforced the signal. Drawing on federal health survey data from 9,583 American adults and published in Scientific Reports, a 2024 analysis determined that each 5-kilogram drop in grip strength was associated with a 36 percent higher mortality risk in men and a 49 percent higher risk in women across roughly seven years of follow-up, according to Morning Overview. A separate study of 5,472 women aged 63 to 99 — published in Public Health and led by Michael J. LaMonte of the University at Buffalo — determined that women in the strongest grip category faced a 33 percent lower chance of death than those in the weakest category, a finding that held after researchers controlled for age, race, lifestyle factors, and existing medical conditions. The data also showed that each gain of roughly 15 pounds in grip strength corresponded to a 15 percent reduction in mortality risk.

Crucially, the women's study found that greater muscular strength predicted lower mortality even in participants who did not meet standard aerobic exercise recommendations — a finding that challenges the traditional emphasis on cardio as the primary exercise for longevity. The study authors observed that strength levels may matter more than previously recognized, noting that aerobic exercise has long been the primary focus of longevity-oriented fitness guidance, according to Managed Healthcare Executive.

Why would hand strength carry so much information about the whole body? The answer lies in what grip strength actually measures. According to Pete Rohleder, a kinesiologist at Kansas State University writing in National Geographic, generating a forceful grip demands coordinated muscle activation, effective transmission of force through tendons and joints, and the nervous system's ability to recruit and synchronize thousands of motor units at once. Grip strength also reveals whether muscle tissue has shrunk or been replaced by fat through aging or inactivity — a process called sarcopenia — and is tied to metabolic and cardiovascular health because muscles depend on adequate blood flow, oxygen delivery, and insulin sensitivity.

Hand grip strength is one of the most overlooked indicators of long-term health. With a single squeeze, it reflects the accumulated effects of how we move, fuel, recover, and live.— Pete Rohleder, kinesiologist, Kansas State University

This is why clinicians increasingly describe grip strength as a functional vital sign — or, as Leong puts it, "the sum of all health-related behaviors, activities, and illnesses both across a lifetime and in the recent past." Unlike blood pressure, which captures a narrow cardiovascular snapshot, or BMI, which reflects body composition without distinguishing muscle from fat, grip strength integrates signals from the muscular, nervous, metabolic, and cardiovascular systems simultaneously.

The cardiovascular connection runs deep. According to National Geographic, grip strength is a window into vascular health, autonomic nervous system function, and overall cardiorespiratory fitness, shaping inflammation, endothelial function, insulin resistance, and heart-rhythm stability — factors that all contribute to heart attacks, strokes, and heart failure. Commenting on the PURE findings, researchers from the University of Southampton proposed that grip strength could be "a particularly good marker of underlying aging processes" rather than simply a measure of muscular power, according to Morning Overview.

Grip strength also tracks with biological aging at the molecular level. Research from 2023, cited by National Geographic, linked lower grip strength to faster DNA methylation aging — a molecular indicator of how quickly the body is aging biologically. Mark Peterson, associate professor of physical medicine and rehabilitation at the University of Michigan and lead author of that study, found that weaker individuals are often biologically older than their chronological age would suggest, while "people who are stronger tend to have a lower biological age."

The practical consequences extend well beyond mortality statistics. People with weaker grip face elevated chances of falls and hospitalization, partly because low grip strength is associated with reduced bone density and a greater likelihood of fractures. According to Rohleder, those with weaker grip tend to move more slowly, have trouble on stairs, and find routine daily tasks harder to manage. Grip strength is also linked to brain health: in one study of more than 40,000 adults cited by National Geographic, a strong grip was associated with better cognitive outcomes. And it predicts what geriatricians call homeostenosis — the body's reserve capacity to bounce back from illness.

Because grip strength is influenced by so many factors across a lifespan, it can tell us much about what we need to know about the health of the body and the brain.— Darryl Leong, director, McMaster University and Hamilton Health Sciences cardio-oncology program

Part of grip strength's appeal as a clinical tool is purely logistical. Administering the test demands only seconds, with no laboratory work, imaging, or blood draw required, and it can be repeated at each appointment to monitor trends over time — much as clinicians already do with blood pressure or weight readings. Scores typically range from roughly 40 pounds in someone with poor grip strength to well over 120 pounds in a healthy adult male, according to National Geographic. The ease of administration was precisely what enabled PURE investigators to gather data from nearly 140,000 participants across 17 countries with widely varying levels of health infrastructure.

The critical caveat — one the PURE investigators were careful to state — is that the research is observational. The findings establish an association between lower grip strength and higher mortality rather than demonstrating that building grip strength prolongs life. "Further research is needed to establish whether efforts to improve muscle strength are likely to reduce an individual's risk," Leong said. The narrower question of whether a resistance-training regimen that boosts grip strength also cuts mortality risk has yet to be answered, even more than a decade after the PURE findings were published, according to Morning Overview. The McMaster institute also noted that additional work was planned to determine whether the pattern held consistently across different ethnic groups.

Meanwhile, the Centers for Disease Control and Prevention advises adults over 60 to add at least two days of muscle-strengthening activity per week — such as wall pushups and resistance band exercises — on top of their regular aerobic routines, according to Managed Healthcare Executive. With women aged 75 and older projected to be the largest age subgroup in the United States by 2050, the LaMonte study's authors argue that future research should better define the type and amounts of muscle-strengthening activity associated with specific health outcomes across the lifespan.

For now, the practical takeaway is modest but meaningful: a squeeze test that takes seconds in a clinic can flag mortality risk that a blood pressure cuff misses — even if medicine has not yet fully answered how best to act on that information.

Why it matters — Grip strength is a free, seconds-long test already available in any clinic that predicts mortality, heart disease, stroke, and cognitive decline — often more accurately than blood pressure — giving patients and doctors a new reason to take muscle-strengthening exercise seriously at any age.

Reported by morningoverview.com, managedhealthcareexecutive.com, nationalgeographic.com