Nothing's wrong. That's the point of this one.
You feel fine. You're not googling a symptom. Nothing's changed and nothing hurts, and if someone asked, you'd say your health was decent - a bit less gym than you'd like, a bit more takeaway, but broadly fine.
Which is exactly the situation this is written for, because feeling fine is the normal state during the decade when your arteries are quietly deciding how the next thirty years go.
Here's what's happening while nothing appears to be happening.
Something worth knowing about young men's arteries
In the 1950s, pathologists examined the hearts of American soldiers killed in Korea. Average age, early twenties. Fit, active, at the peak of physical condition.
A striking proportion already had visible early changes in their coronary arteries. Similar findings turned up decades later in young accident victims.
Not disease. Not anything that would have caused a symptom or shown up on any test they'd have had. Just the first faint beginnings of a process, already underway, in men who were about as healthy as men get.
The point isn't that you're in trouble. It's that this process doesn't start when you turn 50 and get a scary letter from your GP. It starts early, it runs silently for decades, and by the time it announces itself, you've been living with it for a very long time.
Which is why 35 is a reasonable moment to look.
What you're actually looking after
You have something like 100,000 kilometres of blood vessels. That's not a typo, and it's enough to go round the planet twice.
Running through all of it - every artery, every vein, every capillary - is a lining one cell thick. One cell. If you scraped it out and weighed it, it'd come to about the weight of your liver.
That lining isn't packaging. It's doing constant work:
- It decides where your blood goes. It releases a gas called nitric oxide that makes artery walls relax and widen. Run for a bus and it opens the arteries to your legs. Sit down to concentrate and it manages flow to your brain. It's redirecting blood around your body every second of your life, and you've never once thought about it.
- It controls your blood pressure, through that same widening and narrowing.
- It stops your blood clotting when it shouldn't, by keeping its own surface non-stick.
- It decides what crosses out of your bloodstream into the tissue around it.
The property that matters is responsiveness. Healthy arteries aren't passive tubes - they actively open where blood's needed most. That's the thing that degrades first, years before anything narrows or blocks or hurts.
And it degrades without any sensation whatsoever. There are no nerve endings reporting on the state of your artery lining. There's no early ache. Nothing.
Why nobody catches it
Two reasons, and together they explain most of what goes wrong.
1. It's completely silent: Arteries can narrow substantially before producing a single symptom. Not "mild symptoms" - none. Blood pressure high enough to be doing long-term damage feels like nothing at all. Cholesterol that's been elevated for fifteen years feels like nothing at all. Blood sugar drifting up over a decade feels like nothing at all. For a great many men, the first symptom of heart disease is the heart attack.
2. Early is when it's fixable: The first stage - the lining losing its responsiveness - responds well to changing what you do. Once actual plaque has built up in the artery wall, it's much harder to shift.
Put those together and you get the awkward truth: the window where effort gets you the most is precisely the window where nothing seems wrong. There's no feedback telling you to act, and that's why almost nobody does.
You're currently in that window. That's the entire argument for reading this while nothing hurts.
The 3 numbers
Since your body won't tell you, you have to ask it directly. Three numbers cover most of it.
1. Blood pressure: Generally considered fine below 120/80. It causes no sensation at levels that damage your arteries over time. Home monitors cost very little and work well enough.
2. Cholesterol - a lipid profile. A blood test giving you total cholesterol, LDL, HDL and triglycerides. LDL's the one that gets into artery walls and starts trouble, though your doctor reads it in context rather than against a single cutoff. Also completely silent.
3. Blood sugar - fasting glucose or HbA1c. HbA1c gives an average over about three months, which is more useful than a snapshot. Prediabetes is extremely common, largely undiagnosed, and already doing damage to small vessels by the time it's caught.
Two more worth knowing: your waist measurement, which tells you more than BMI about the fat that actually matters, and whether heart disease runs early in your family - that genuinely shifts your risk and changes what your doctor does about it.
If you do one thing off the back of reading this, make it this. One appointment, one blood draw. It's cheap and routine and available at any clinic or diagnostic lab. If you've never had it done, that's the gap worth closing this month.
What wears it down
- Smoking, in any form. About as direct as damage to that lining gets.
- High blood pressure - constant mechanical stress on the vessel wall.
- High LDL cholesterol - gets into the wall and starts the plaque process.
- Blood sugar creeping up - damages small vessels and the nerves alongside them.
- Sitting all day. Blood flow is itself the signal that keeps the lining working. No flow, no signal.
- Fat around the middle - metabolically active tissue that drives inflammation throughout the body.
- Bad sleep, and untreated sleep apnoea in particular.
- Long-term stress - the alert state constricts vessels, and living in it constantly has a real physical cost.
- Too much alcohol - pushes blood pressure and triglycerides up.
Nearly all of that is modifiable. That's the only reason to list it.
What keeps it working
Get out of breath regularly. This is the strongest thing on the list and the mechanism is neat: blood rushing faster across that lining is physically what tells it to produce more nitric oxide and work better. You're not just using the system, you're training it. Rough target is 150 minutes a week of something moderate - but the biggest jump in benefit is from doing nothing to doing something, not from doing lots to doing more.
Lift something heavy twice a week. Muscle mass, insulin sensitivity, general metabolic health.
Eat more plants. Vegetables, beans, lentils, whole grains, nuts, oily fish. Swap butter and fatty meat for olive oil, nuts, seeds. Leafy greens and beetroot are useful specifically here - they contain nitrate your body can convert into that same nitric oxide.
Sleep seven to nine hours. If you snore heavily or wake up unrefreshed, get checked for sleep apnoea. It's common, it's badly underdiagnosed, and it damages vessels and hormones at the same time.
Don't smoke. And if you do, stopping produces measurable improvement - this isn't a lost cause situation.
Take stress seriously as a physical thing, not a mood.
If your doctor recommends medication, take it seriously. Tablets for blood pressure, cholesterol or blood sugar aren't a failure of willpower or an alternative to looking after yourself. They work alongside it, and they're prescribed based on your overall risk rather than one number looking bad.
When to stop waiting and go
Mostly this stuff is silent. But some things mean an appointment rather than a wait-and-see:
- Chest pain, pressure or tightness - especially when you exert yourself. Seek urgent medical attention.
- Getting unusually out of breath doing something that used to be easy
- Pain in your legs when walking that stops when you rest
- Persistent unexplained tiredness
- A gradual, unexplained change in erections
That last one's on a general vascular health list for a specific reason. The arteries involved are far narrower than most others in your body - think spaghetti versus drinking straw. The same small amount of narrowing that a wide artery absorbs without any consequence takes out a large share of a narrow one. So they lose flow first, and can flag a circulation problem years before anything else does.
It has plenty of other causes, most of them not vascular at all - stress, sleep, drink, antidepressants. It's not a diagnosis of anything. It's just a reasonable prompt to go get those three numbers checked.
The unglamorous truth
Vascular health gives you no feedback while it's going well and none while it's going badly, and the advice for looking after it hasn't changed much in thirty years. It's the least exciting thing in men's health.
It's also underneath almost everything you'd actually notice: your energy, your endurance in the gym, how fast you recover, how sharp you feel in the afternoon, and yes, your sex life. It's usually sold to men as insurance against something bad happening in twenty years, which is easy to file under "later." The nearer truth is that it's also determining how this week goes.
You feel fine, and you'll almost certainly get fine numbers back. Get them anyway. That's the whole point of doing it now rather than later.
