You can learn quite a bit about your heart without an expensive scan or complicated test.
In fact, five numbers that you can find at home or on routine blood work can give you a surprisingly useful picture of your cardiovascular health.
The problem is that many people get these numbers, glance at them, and move on.
Your doctor says, “Your LDL is 112.”
You nod.
Then you get home and think, Was 112 good or bad?
So today, let’s make this simple.
Here are five numbers I think everyone over 50 should know — and understand.
1. Your Blood Pressure
If I could choose only one number on this list for you to follow regularly, blood pressure would be near the top.
Blood pressure measures the force of blood pushing against the walls of your arteries.
You actually get two numbers:
Systolic pressure — the top number — measures the pressure when your heart contracts.
Diastolic pressure — the bottom number — measures the pressure between heartbeats.
A normal blood pressure is generally considered less than 120/80 mm Hg. A reading of 120–129 with a bottom number below 80 is considered elevated. Blood pressure of 130–139 systolic or 80–89 diastolic falls into the Stage 1 hypertension range.
Why do I care so much about blood pressure?
Because high blood pressure can quietly damage your arteries for years without causing symptoms. Over time, it increases your risk of heart attack, stroke, heart failure, kidney disease, and other problems.
That is why hypertension is often called a silent disease.
Dr. Mike’s Take
Don’t rely on one blood pressure reading.
Blood pressure changes throughout the day. Stress, exercise, caffeine, medications, and even rushing into your doctor’s office can affect it.
If your pressure tends to run high, a good home blood pressure monitor and a series of readings can be much more useful than a single measurement.
2. Your LDL Cholesterol
You have probably heard LDL called the “bad cholesterol.”
That description isn’t perfect, but it gets the point across.
LDL stands for low-density lipoprotein. When too much LDL circulates in your blood, cholesterol can accumulate in the walls of your arteries.
Over many years, that contributes to atherosclerosis — the buildup of plaque inside your arteries. That plaque can eventually contribute to a heart attack or stroke.
Here is where cholesterol gets a little more complicated.
There isn’t one perfect LDL number for everybody.
The LDL level your doctor recommends depends on your overall cardiovascular risk. Someone who has already had a heart attack may have a much lower LDL goal than someone with few cardiovascular risk factors.
Your age, blood pressure, smoking history, diabetes, family history, and other factors all matter.
Remember This
Don’t just ask, “Is my cholesterol normal?”
Ask:
“What should my LDL goal be based on my cardiovascular risk?”
That is a much better question.
3. Your Triglycerides
Triglycerides don’t get nearly as much attention as cholesterol, but they deserve a place on this list.
Triglycerides are a type of fat circulating in your bloodstream. Your body uses them to store excess energy.
A triglyceride level below 150 mg/dL is generally considered normal.
High triglycerides can be associated with excess weight, inactivity, alcohol intake, diabetes, and diets high in refined carbohydrates.
And triglycerides become particularly concerning when they appear alongside other cardiovascular risk factors, such as high LDL or low HDL cholesterol.
The good news?
Triglycerides often respond quite well to lifestyle changes.
Regular exercise, losing excess weight, limiting excessive alcohol, and reducing refined carbohydrates can all help.
4. Your A1C
You may think of A1C as a diabetes number. It is. But it is also an important heart-health number.
A1C gives us an estimate of your average blood sugar over roughly the previous two to three months.
Generally:
Below 5.7% — normal
5.7–6.4% — prediabetes
6.5% or higher — diabetes
There are exceptions, and your doctor may repeat testing before making a diagnosis.
Why does this matter to your heart?
Because chronically elevated blood sugar can damage blood vessels. Prediabetes and diabetes are associated with increased cardiovascular risk, including heart disease and stroke.
And here’s something many people don’t realize:
You can feel perfectly fine while your blood sugar is gradually climbing.
That is why knowing your A1C can be valuable, particularly as you get older.
Dr. Mike’s Take
Prediabetes isn’t something to panic about. It’s something to act on.
If your A1C is beginning to rise, that is a good time to look at your activity, weight, nutrition, sleep, and other risk factors.
Small changes made early can make a meaningful difference.
5. Your Resting Heart Rate
This one doesn’t require a blood test at all.
Your resting heart rate is simply the number of times your heart beats per minute when you’re relaxed and not exercising.
For most adults, a resting heart rate between 60 and 100 beats per minute is considered normal. Physically active people may have resting heart rates below 60 because their hearts can pump blood more efficiently.
But don’t become obsessed with getting your heart rate as low as possible.
Lower isn’t automatically better.
Medications, fitness level, dehydration, illness, stress, thyroid problems, heart rhythm abnormalities, and other factors can all affect your heart rate.
What I find particularly useful is watching the trend.
If your usual resting heart rate is 62 and suddenly it is consistently 80, something may have changed.
That doesn’t necessarily mean something is wrong with your heart, but it may be worth figuring out why.
Put the Numbers Together
Here is the important part.
No single number tells you whether your heart is healthy.
Imagine two people who both have an LDL cholesterol of 120.
One exercises regularly, doesn’t smoke, has normal blood pressure, normal blood sugar, and no known cardiovascular disease.
The other has diabetes, high blood pressure, smokes, and previously had a heart attack.
Same LDL.
Very different cardiovascular risk.
That’s why your doctor looks at the whole picture rather than one laboratory result.
And that is how I want you to think about these numbers too.
Your Heart Health Dashboard
Think of these five numbers like the dashboard in your car.
You don’t stare at your temperature gauge every five minutes.
But you want to know when it’s heading in the wrong direction.
The same applies here.
Blood pressure: Is it creeping upward?
LDL: Is it appropriate for your cardiovascular risk?
Triglycerides: Are they staying below 150?
A1C: Is your blood sugar moving toward the prediabetes range?
Resting heart rate: Is it relatively stable for you?
The trend can sometimes tell you more than one isolated result.
The Bottom Line
Getting older does increase cardiovascular risk.
But age is only part of the story.
Your daily habits — including exercise, nutrition, sleep, weight management, smoking, and taking prescribed medications when needed — can influence many of these numbers.
And that’s encouraging.
Because you cannot change the year you were born.
But you can work on many of the factors that determine how well your heart ages.
So at your next checkup, don’t just hear that your labs are “fine.”
Ask for your numbers. Write them down. Understand what they mean. And follow them over time.
Your heart has been working for you every minute of every day for decades.
It’s worth keeping an eye on the dashboard.
This article is for educational purposes and is not a substitute for medical advice from your healthcare professional.