WHAT CHANGES AFTER 50
You may notice that you don’t move quite as quickly at 65 as you did at 35. Your muscles lose some strength. Your joints get a little stiffer. Your recovery takes longer.
Your heart ages too.
That doesn’t mean your heart suddenly becomes “old” when you turn 50. And it certainly doesn’t mean heart disease is inevitable.
But your heart and blood vessels gradually change with age. Understanding those changes can help you make better decisions about exercise, blood pressure, cholesterol, nutrition, and the other things that influence your cardiovascular health.
The good news? Your heart may be aging, but many of the factors that determine how well it ages are still within your control.
Let’s look at what’s happening.
1. Your Heart Becomes a Little Stiffer
Your heart is a muscle, but it is a very specialized one.
With age, the walls of the heart—particularly the main pumping chamber called the left ventricle—can gradually become thicker and less flexible.
That means the heart may not relax and fill with blood quite as easily between beats.
For most healthy people, this happens slowly and may cause no noticeable symptoms. But when combined with high blood pressure, diabetes, obesity, or other health problems, it can contribute to heart problems later in life.
This is one reason controlling blood pressure becomes increasingly important as we age.
Dr. Mike’s Take
Aging affects the heart, but aging and heart disease are not the same thing. Think of age as one piece of the puzzle. Your blood pressure, cholesterol, activity level, weight, smoking history, blood sugar, and genetics help determine the rest of the picture.
2. Your Arteries Get Stiffer Too
Your heart is only half of your cardiovascular system.
The other half is the enormous network of blood vessels carrying blood throughout your body.
When we are young, our arteries are relatively elastic. They expand slightly every time the heart pumps blood into them and then recoil.
Over time, those arteries tend to become stiffer.
Imagine the difference between a new garden hose and an old one that has been sitting outside for years. The older hose simply isn’t as flexible.
As your arteries stiffen, your heart has to pump against greater resistance. This is one reason blood pressure—especially the top number, or systolic pressure—often rises with age.
High blood pressure then places even more stress on the arteries and heart.
It can become a vicious cycle.
3. Your Maximum Heart Rate Declines
Have you ever wondered why exercise heart-rate targets change as you get older?
There is a reason. Your maximum heart rate gradually decreases with age.
A 25-year-old heart can usually beat considerably faster during all-out exercise than a 70-year-old heart.
This isn’t necessarily a sign that something is wrong. It is part of normal aging.
But it does affect exercise capacity.
Your heart may not be able to increase its output during intense activity quite as dramatically as it once did. Combined with changes in your muscles, lungs, and circulation, this can contribute to the gradual decline in aerobic fitness that often occurs with age.
Here’s the important part:
That decline can be influenced by training.
You cannot stop your maximum heart rate from aging, but you can improve how efficiently your cardiovascular system uses the capacity it still has.
4. Your Aerobic Fitness Tends to Decline
You may have heard me talk about VO₂ max before.
VO₂ max is essentially a measure of how effectively your body can take in oxygen, transport it through your bloodstream, and use it in your muscles during exercise.
It tends to decline as we get older. Part of that decline is biological aging. But there is another major reason. We often become less active.
We stop playing sports. We walk less. We sit more. Injuries slow us down. Work, family, and eventually retirement change our routines.
The cardiovascular system responds to what we ask it to do. If we rarely challenge it, our fitness declines faster. If we continue to exercise, we can preserve considerably more of our cardiovascular capacity.
That is one of the reasons I continue to emphasize exercise after 50.
You’re not trying to become 25 again.
You’re trying to become the healthiest 60-, 70-, or 80-year-old version of yourself.
5. Blood Pressure Becomes More Important
High blood pressure is sometimes called a silent problem because you can feel perfectly fine while it is damaging your arteries, heart, kidneys, and brain.
And it becomes increasingly common as we age.
Remember those stiffening arteries we just discussed? They are part of the reason.
The problem is that high blood pressure makes your heart work harder every minute of every day. Not just when you exercise. Not just when you climb stairs. Twenty-four hours a day.
Over years, that extra workload matters.
That is why I want you to know your blood pressure—not just assume it is okay because you feel fine.
Remember This
You cannot tell whether your blood pressure or cholesterol is normal based on how you feel. Some of the most important cardiovascular risk factors produce no symptoms at all.
6. Cholesterol Has Had More Time to Do Its Damage
Cholesterol itself isn’t simply an “aging” problem.
The issue is exposure over time.
LDL cholesterol can contribute to plaque formation inside the walls of your arteries. That process, called atherosclerosis, usually develops over decades.
Think about that for a moment.
At 30, you may have had several years of exposure to elevated LDL cholesterol. At 65, you may have had several decades.
That accumulated exposure helps explain why heart attacks and strokes become more common as we get older.
The same idea applies to smoking, high blood pressure, diabetes, and physical inactivity.
What happens to your heart at 70 is partly influenced by what happened to your arteries at 40, 50, and 60.
But don’t interpret that as, “Well, the damage is already done.” That would be the wrong message. Reducing cardiovascular risk factors later in life still matters.
7. Your Heart’s Electrical System Ages
Your heartbeat is controlled by a remarkable electrical system.
That system changes with age too.
Some of the specialized cells responsible for maintaining your normal heartbeat gradually decrease, and changes can occur in the electrical pathways through the heart.
For many people, nothing significant ever comes from this.
But the likelihood of abnormal heart rhythms increases with age.
One of the most important is atrial fibrillation, often called AFib.
AFib can cause a fast or irregular heartbeat and increases the risk of stroke.
Some people feel palpitations, fatigue, shortness of breath, or decreased exercise tolerance.
Others feel nothing at all.
A persistently irregular heartbeat deserves medical attention.
What Can You Actually Do About an Aging Heart?
You cannot change your birthday.
Fortunately, your birthday is only one cardiovascular risk factor.
The basics still matter enormously:
- Exercise regularly. Include aerobic exercise and strength training.
- Know your blood pressure.
- Know your cholesterol numbers.
- Don’t smoke.
- Keep diabetes and blood sugar under good control if applicable.
- Maintain a healthy weight.
- Eat mostly minimally processed foods, vegetables, fruits, whole grains, healthy fats, and adequate protein.
- Sleep well.
- Keep up with regular medical care.
None of these is exciting enough to become the next miracle cure on social media.
But they work.
And there is something else I want you to remember.
Starting at 60 or 70 still counts.
If you haven’t exercised regularly for years, you haven’t missed your chance. If your blood pressure has crept upward, address it now. If you haven’t checked your cholesterol recently, talk with your doctor.
Your cardiovascular system remains responsive to healthier habits even as you get older.
The Bottom Line
Your heart changes after 50. It becomes somewhat stiffer, your arteries lose elasticity, your maximum heart rate decreases, and your aerobic capacity tends to decline. At the same time, decades of exposure to high blood pressure, cholesterol, smoking, diabetes, and inactivity can begin to show their effects.
But heart disease is not simply the inevitable price of getting older.
You may not control the number of candles on your birthday cake, but you have considerable influence over how you age.
Keep moving. Know your numbers. Challenge your cardiovascular system regularly. And give your heart a reason to stay strong.
It has a lot more work to do.
This article is for educational purposes and is not a substitute for personal medical advice. Talk with your healthcare professional about your individual cardiovascular risk factors and before making major changes to your exercise program, particularly if you have known heart disease or concerning symptoms.