Your cholesterol numbers look fine. Your blood pressure is borderline-normal. You exercise regularly. By the standard cardiovascular screening checklist, you're doing well.
But there's a cardiovascular marker that doesn't appear on any standard panel and isn't checked during most physicals — one that some researchers consider more predictive of cardiovascular events than cholesterol, blood pressure, or even coronary calcium score in some populations. It's arterial stiffness, and understanding it might be one of the most useful things you can do for long-term cardiovascular health.
What Is Arterial Stiffness?
Healthy arteries are elastic. When the heart beats, the aorta and large arteries expand to absorb the pressure wave, then contract to help push blood forward. This cushioning effect reduces the pressure your smaller arteries and organs — including your brain and kidneys — have to absorb with each heartbeat.
As arteries stiffen, they lose this buffering capacity. Pressure waves travel faster and hit peripheral vessels harder. The heart has to work against more resistance. Pulse pressure (the difference between systolic and diastolic) widens. The end result is accelerated wear on blood vessel walls, the heart, and end organs.
Arterial stiffness increases with age — it roughly doubles between the ages of 30 and 70. But the rate of increase is not fixed. Lifestyle, metabolic health, and possibly some supplements may meaningfully influence how fast this happens.
Related: Try our Biological Age Calculator to test this yourself. Also worth reading: Advanced Lipid Panel: ApoB, LDL-P & More, our Heart & Cardiovascular Health guide, and Men's Health Optimization by Decade.
How It's Measured
Pulse Wave Velocity (PWV)
The gold standard for arterial stiffness is carotid-femoral pulse wave velocity. It measures how fast a pressure wave travels from the carotid artery (neck) to the femoral artery (upper thigh). Stiffer arteries conduct the wave faster.
Normal PWV for a 40-year-old is approximately 7-9 m/s. Above 10 m/s is generally considered elevated. This test is available at academic medical centers, some cardiologists, and increasingly through private health optimization clinics.
Augmentation Index (AIx)
The augmentation index is derived from pulse wave analysis and reflects the contribution of the reflected pressure wave to central aortic pressure. Higher AIx suggests stiffer arteries. It can be measured non-invasively using pulse tonometry.
Pulse Pressure
A rough proxy available from any blood pressure reading: systolic minus diastolic. In younger adults, this is typically 30-40 mmHg. Widening pulse pressure (above 50-60 mmHg) in middle age suggests increasing arterial stiffness. It's not a direct measure, but it's free and already in your data if you track blood pressure consistently.
Wearables
Some advanced wearables now estimate arterial stiffness or pulse wave velocity using photoplethysmography (PPG). These are not as accurate as clinical measurements but may track directional trends over time.
Widening pulse pressure — your systolic going up while your diastolic stays the same or drops — is a common clinical sign of increasing arterial stiffness in men over 40. If you're tracking blood pressure at home and see this pattern emerging, it's worth discussing with a physician.
What Drives Arterial Stiffness
Several factors accelerate arterial stiffness beyond normal aging:
Metabolic:
- Insulin resistance and elevated blood glucose (glucose cross-links with arterial collagen)
- Elevated triglycerides
- Obesity, particularly visceral fat
Lifestyle:
- Sedentary behavior
- Chronic psychological stress
- Smoking (even past history)
- Excessive sodium intake
Cardiovascular:
- Elevated blood pressure (stiffness and pressure are bidirectionally linked — each worsens the other)
- Elevated inflammation (hsCRP, homocysteine)
What May Help
Aerobic Exercise
This is the most evidence-backed intervention for arterial stiffness. Regular aerobic exercise — particularly sustained moderate-intensity cardio — consistently reduces PWV in middle-aged adults. One meta-analysis found aerobic training reduced aortic PWV by approximately 1 m/s on average, which is clinically meaningful. Resistance training alone shows smaller effects; combining both appears optimal.
Protocol: 3-5 sessions per week, 30-45 minutes at Zone 2 intensity, for at least 12 weeks to see measurable changes in stiffness markers.
Blood Glucose and Insulin Management
Because advanced glycation end products (AGEs) directly stiffen arterial walls by cross-linking collagen, managing blood glucose is one of the most mechanistically direct interventions for arterial stiffness. This means:
- Reducing refined carbohydrate intake
- Avoiding prolonged blood glucose spikes (CGM data is useful here)
- Improving insulin sensitivity through exercise and metabolic health
Dietary Nitrate and NO Precursors
Compounds that enhance nitric oxide bioavailability — including dietary nitrate from vegetables, citrulline, and aged garlic extract — may reduce arterial stiffness by improving endothelial function and promoting vasodilation. The evidence is moderate strength, with effects generally in the range of modest PWV reductions.
Omega-3 Fatty Acids
Higher EPA and DHA intake has been associated with lower arterial stiffness in observational data, and some interventional studies show modest reductions in AIx and PWV. The effect is not large, but omega-3s have multiple cardiovascular benefits that stack with this one.
Magnesium
Magnesium deficiency appears to accelerate arterial stiffness. Supplementation has shown some positive effects on vascular function, though the arterial stiffness evidence specifically is mixed.
Arterial stiffness is influenced by factors that compound over decades. The time to intervene is before you have obvious cardiovascular symptoms, not after. Aggressive late intervention can slow progression, but early consistent lifestyle choices have a much larger effect on long-term trajectory.
Pros
- +Arterial stiffness measurement adds independent risk information beyond standard lipid and BP panels
- +Aerobic exercise is a highly effective intervention with broad supporting evidence
- +Pulse pressure as a proxy is available from home blood pressure monitoring at no added cost
- +Managing blood glucose and insulin resistance addresses the root mechanism of collagen cross-linking
- +Multiple lifestyle interventions compound favorably
Cons
- -Clinical PWV measurement is not widely available through standard primary care
- -Wearable estimates of stiffness are directional at best, not clinically validated
- -Changes in arterial stiffness take 12-24 weeks of consistent intervention to register
- -Some drivers (smoking history, genetic predisposition) are not fully reversible
- -Stiffness and blood pressure are bidirectionally linked — it can be difficult to disentangle causes from effects
Be the first to try Prova
We're building an app to track whether arterial-stiffness-tracking actually works. Join the waitlist.
The Bottom Line
Arterial stiffness is a meaningful cardiovascular metric that most standard screening misses entirely. Your arteries' elasticity reflects decades of cumulative metabolic, lifestyle, and vascular health choices — and it's modifiable, especially earlier in the process. Aerobic exercise is the most powerful intervention. Blood glucose management, nitric oxide support, and inflammation reduction all contribute through separate mechanisms. Track your pulse pressure over time as a free proxy, and consider formal PWV testing if you have a family history of cardiovascular disease or want a more complete picture of your vascular age.