What Is Arterial Stiffness and Why Does It Matter for Heart Health?
Your arteries are not meant to behave like rigid pipes. Healthy arteries stretch slightly with each heartbeat and recoil between beats, helping blood move smoothly around the body. Arterial stiffness describes a loss of this normal flexibility, particularly in large arteries such as the aorta. Some stiffening occurs naturally with age, but high blood pressure, metabolic disease, smoking and other cardiovascular risk factors can accelerate the process. Stiffer arteries can increase the pressure the heart must pump against and are associated with a higher risk of cardiovascular events. Understanding arterial stiffness can therefore provide another window into blood vessel health alongside familiar measures such as blood pressure, cholesterol and blood glucose.
What Is Arterial Stiffness?
Arterial stiffness means that an artery has become less able to expand and recoil as blood is pumped through it. It is a property of the artery wall and is different from simply having a narrowed or blocked artery.
Think of a healthy large artery as an elastic tube. When the heart contracts, the artery expands to accommodate the surge of blood. Between heartbeats, it recoils, helping maintain relatively steady blood flow.
As arteries stiffen, they cannot absorb that pressure wave as effectively. The pressure wave consequently travels through the arterial system more rapidly.
This distinction also helps explain why arterial stiffness should not automatically be treated as another name for atherosclerosis.
Arterial stiffness versus atherosclerosis
Atherosclerosis occurs when fatty material and other substances accumulate within artery walls and form plaque.
Arterial stiffness describes reduced elasticity of the artery wall. The two processes can coexist and influence one another, but they are not identical. The American Heart Association describes arteriosclerosis as the broader process of arteries becoming thicker and stiffer, while atherosclerosis specifically involves plaque buildup.
Arterial stiffness and atherosclerosis are related but different vascular changes.
Feature | Arterial stiffness | Atherosclerosis |
Main change | Artery wall loses elasticity | Plaque develops within artery walls |
Effect on arteries | Reduced ability to expand and recoil | May narrow arteries or alter blood flow |
Strongly related to | Ageing and blood pressure, among other factors | Cholesterol-containing plaque and multiple cardiovascular risk factors |
Can occur together? | Yes | Yes |
Why it matters | Changes pressure and workload on the cardiovascular system | Can contribute to heart attack, stroke and peripheral artery disease |
Why Does Arterial Stiffness Matter for Heart Health?
Arterial stiffness matters because flexible arteries help buffer the pressure produced by every heartbeat. When large arteries become stiff, systolic pressure can rise, the heart may face a greater workload, and damaging pressure may be transmitted more strongly into smaller blood vessels.
This relationship can become particularly important with ageing. The American Heart Association notes that large arteries become stiffer as people grow older, contributing to the tendency for systolic blood pressure to rise with age. Blood pressure readings therefore remain an important part of assessing cardiovascular health.
The heart has to pump against a less flexible system
The left ventricle—the heart's main pumping chamber—must generate enough force to send blood into the aorta. If the large arteries are less compliant, the cardiovascular system cannot cushion each heartbeat as effectively.
Over time, increased pressure and workload can contribute to changes in the heart. This is one reason arterial stiffness and hypertension are closely connected.
Pressure waves return differently
Every heartbeat generates a pressure wave that travels along the arteries. Some of that wave is reflected back toward the heart from smaller arteries and branch points.
When arteries are flexible, the wave travels more slowly. When they are stiff, it travels faster, which can change the timing of the returning pressure wave and contribute to higher central systolic pressure.
Arterial stiffness is not simply about an artery feeling “hard.” It changes how the pressure generated by each heartbeat travels through the circulation, which helps explain its relationship with blood pressure, heart workload and cardiovascular risk.
What Causes Arteries to Become Stiffer?
Ageing is an important contributor to arterial stiffness, but age is not the whole story. Blood pressure, smoking and metabolic health can also influence the condition of blood vessels, which means people of the same age may have very different vascular health.
Ageing changes the artery wall
Large arteries contain elastin and collagen, structural proteins that help determine how flexible or firm the vessel wall is. With ageing, the properties of the arterial wall gradually change and arteries generally lose some elasticity.
This is a normal biological process, although its extent varies considerably between individuals.
High blood pressure and arterial stiffness are closely linked
High blood pressure places repeated mechanical stress on artery walls. At the same time, stiffer arteries can contribute to higher systolic pressure because they are less able to absorb the force produced when the heart contracts.
That means the relationship can work in both directions rather than following a simple one-way pathway.
Uncontrolled hypertension is particularly important because it can damage blood vessels as well as the heart, brain and kidneys. The health effects of high blood pressure include increased risks of heart attack, stroke, heart failure and kidney disease.
Other cardiovascular risk factors matter too
Arterial stiffness has also been associated with factors and conditions including:
smoking;
diabetes and impaired glucose regulation;
obesity and metabolic abnormalities;
chronic kidney disease;
low physical activity;
vascular inflammation; and
established cardiovascular disease.
These relationships do not mean that any single factor inevitably causes severe arterial stiffness. Vascular ageing develops through interacting biological, medical and lifestyle influences.
Factors relevant to arterial and overall cardiovascular health.
Factor | Can you change it? | Practical cardiovascular focus |
Increasing age | No | Monitor cardiovascular risk factors over time |
High blood pressure | Often manageable | Check and appropriately manage blood pressure |
Smoking/tobacco exposure | Yes | Avoid tobacco and seek cessation support if needed |
Low physical activity | Usually | Build regular movement into the week as medically appropriate |
High dietary sodium intake | Usually | Reduce excessive salt and highly salted foods |
Often manageable | Monitor and manage glucose with appropriate medical care | |
Often manageable | Assess overall cardiovascular risk and treat when indicated | |
Chronic kidney disease | Requires medical management | Monitor kidney and cardiovascular health with a clinician |
How Is Arterial Stiffness Measured?
The most established way to assess large-artery stiffness is pulse wave velocity (PWV), which measures how quickly a pressure wave travels through a section of the arterial system. A faster wave generally indicates a stiffer artery.
What is pulse wave velocity?
A pulse is more than something you can feel at your wrist. Each heartbeat creates a pressure wave that moves through your arteries.
PWV testing records the wave at two locations and estimates the speed at which it travels between them. Carotid-femoral pulse wave velocity, which assesses the pathway between the carotid and femoral arteries, is widely used to evaluate aortic stiffness.
The 2024 European Society of Cardiology hypertension guideline states that arterial stiffness assessed by PWV is associated with cardiovascular events and can improve cardiovascular risk stratification. It lists carotid-femoral PWV above 10 metres per second as a commonly used threshold indicating increased risk. However, interpretation belongs in the context of the person's overall cardiovascular assessment rather than as an isolated diagnosis. The 2024 ESC hypertension guideline discusses PWV as an additional risk-assessment test in selected patients.
Do you need an arterial stiffness test?
Not necessarily. PWV is useful in cardiovascular research and can provide additional clinical information, but it is not a replacement for standard cardiovascular assessment.
For many people, routinely checking blood pressure and evaluating established risk factors—such as cholesterol, diabetes, smoking, kidney health and family history—will remain more immediately relevant.
If a clinic or health device gives you an “arterial age,” stiffness score or similar measurement, ask what technology was used, whether the measurement has been clinically validated and how the result changes your medical care. A number without appropriate context should not be used to diagnose cardiovascular disease.
Can You Reduce Arterial Stiffness?
Some age-related changes cannot be reversed, but many factors associated with vascular health can be improved or managed. The practical goal is not to chase a particular “arterial age”; it is to control established cardiovascular risks that affect your arteries, heart, brain and kidneys.
Keep blood pressure under control
Blood pressure deserves particular attention because of its close relationship with arterial stiffness and cardiovascular disease. If you have hypertension, follow the treatment plan recommended by your healthcare professional rather than changing or stopping medicines because of an arterial-stiffness reading.
Be physically active
Regular physical activity supports cardiovascular health and reduces the risk of hypertension, coronary heart disease and stroke. The WHO physical activity recommendations advise adults to aim for 150–300 minutes of moderate-intensity aerobic activity each week, or 75–150 minutes of vigorous activity, plus muscle-strengthening activities on at least two days where appropriate.
If you have known cardiovascular disease, significant symptoms or limitations that affect exercise, discuss an appropriate activity level with your healthcare professional.
Pay attention to salt and overall diet
Excess sodium can raise blood pressure. WHO recommends that adults consume less than 2 grams of sodium per day, equivalent to less than 5 grams of salt, while recognising that individual dietary requirements may need medical consideration.
A heart-supportive eating pattern also emphasises vegetables, fruits, pulses and legumes, whole grains and other minimally processed foods while limiting excessive salt and highly processed foods.
Address the cardiovascular risks you can change
Other practical priorities include avoiding tobacco, maintaining an appropriate weight, managing diabetes when present and having cholesterol assessed according to your individual cardiovascular risk.
There is no need to look for a supplement or “artery detox” specifically marketed to make arteries flexible. Treatments should target medically recognised risk factors and conditions rather than unsupported claims about reversing vascular ageing.
How Does Arterial Stiffness Fit Into Your Overall Heart Risk?
Arterial stiffness is best understood as one piece of a larger cardiovascular picture. A PWV result does not independently tell you whether you will develop heart disease, and a favourable result does not cancel out other important risk factors.
Doctors generally build cardiovascular risk assessments from information such as:
age and sex;
blood pressure;
cholesterol levels;
smoking status;
diabetes;
kidney function;
family and medical history; and
evidence of existing cardiovascular disease.
Additional tests may be useful when they can meaningfully refine a clinical decision. The 2024 ESC hypertension guideline, for example, identifies PWV as an optional additional test that may help with risk assessment in selected people with elevated blood pressure.
This distinction matters because arterial stiffness is a risk marker, not a stand-alone prediction of what will happen to an individual person.
When Should You Speak to a Healthcare Professional?
Arterial stiffness itself usually does not produce a distinctive symptom that allows you to feel or diagnose it at home. Instead, focus on cardiovascular risk assessment and symptoms that may indicate an urgent heart or circulation problem.
Arrange a routine medical assessment if you repeatedly have high blood pressure, have diabetes or kidney disease, smoke, have abnormal cholesterol, have a strong family history of premature cardiovascular disease, or are concerned about your overall heart risk.
Seek urgent medical attention for symptoms such as new or severe chest pain, significant shortness of breath, fainting, or sudden signs of stroke such as facial weakness, arm weakness or difficulty speaking. Local emergency services should be used for potentially life-threatening symptoms rather than waiting for an arterial-stiffness assessment.
Conclusion
Arterial stiffness is the loss of some of the natural flexibility that allows large arteries to expand and recoil with every heartbeat. It increases with ageing but is also closely connected with blood pressure and broader cardiovascular health. Measuring arterial stiffness, particularly with pulse wave velocity, can provide useful additional information in selected people, but it does not replace established cardiovascular risk assessment.
The practical priority is to protect your vascular health by managing blood pressure, staying active, avoiding tobacco and addressing cholesterol, diabetes and other recognised risk factors. If you are concerned about your heart or artery health, discuss your overall cardiovascular risk with a qualified healthcare professional rather than relying on a single vascular measurement.
Frequently Asked Questions
1: Is arterial stiffness the same as blocked arteries?
No. Arterial stiffness means the artery wall has lost some flexibility, while blocked or narrowed arteries are commonly associated with conditions such as atherosclerosis and plaque buildup. The processes can occur together, but one does not automatically mean the other is present.
2: Does arterial stiffness increase with age?
Yes, arteries generally become stiffer with age as their walls undergo structural and functional changes. However, ageing is not the only influence. Blood pressure, smoking, diabetes, kidney disease and other cardiovascular factors can also affect vascular health.
3: Can you feel arterial stiffness?
Usually not. Arterial stiffness does not normally cause a specific sensation that lets you identify it yourself. It can be assessed using specialised measurements such as pulse wave velocity, while routine cardiovascular checks help identify more established risk factors such as hypertension.
4: What is a normal pulse wave velocity?
There is no single PWV value that should be interpreted without context because results depend partly on the method and arterial segment measured. The 2024 ESC guideline identifies carotid-femoral PWV above 10 m/s as a commonly used increased-risk threshold. A clinician should interpret individual results.
5: Can exercise improve artery health?
Regular physical activity supports blood pressure and overall cardiovascular health and may beneficially influence vascular function. WHO recommends 150–300 minutes of moderate aerobic activity weekly for most adults, or an equivalent amount of vigorous activity. Your appropriate exercise level may differ if you have medical conditions.
6: Should everyone be tested for arterial stiffness?
No. Arterial-stiffness testing is not required for every adult as a routine stand-alone screening test. PWV can provide additional risk information in selected situations, but blood pressure, cholesterol, diabetes, smoking and other established cardiovascular risk factors remain central to routine assessment.
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