Heart health after 50: a guide for New Zealand men

If I could get every man over 50 in New Zealand to pay attention to one thing, it would be his heart. Cardiovascular disease is still the leading cause of death for Kiwi men — and it’s also one of the most preventable. The frustrating part is that it builds silently for years, with no symptoms, right up until it announces itself. The good news is that the levers that protect you are well understood and largely in your hands.

I’m Dr Roderick Mulgan, an Auckland GP and the founder of Lifeguard Health. This is a plain-English guide to heart health for New Zealand men over 50: the numbers worth knowing, the habits that matter most, and where diet and supplements genuinely fit. It sits alongside our wider men’s health guide for over-45s.

Why the heart is the big one after 50

As we age, the cumulative effect of blood pressure, cholesterol, blood sugar and lifestyle starts to show. For men, that risk tends to climb earlier than it does for women. The problem is that none of it hurts — you can have high blood pressure or rising cholesterol for years and feel completely fine. That’s not a reason to relax; it’s the reason to check.

The numbers that quietly decide your future

Three measurements do most of the work, and all three are silent:

• Blood pressure. High blood pressure is one of the biggest and most treatable risks for heart attack and stroke. It causes no symptoms, so the only way to know is to measure it.
• Cholesterol (and the wider lipid picture). A simple blood test shows your cholesterol and related fats, which feed directly into your heart risk.
• Blood sugar (HbA1c). Creeping blood sugar and type 2 diabetes sharply raise cardiovascular risk, and again there are often no early symptoms.

In New Zealand, your GP or practice nurse can pull these together into a cardiovascular risk assessment — a straightforward check, usually recommended for men from around their mid-40s (earlier for some groups, including Māori, Pacific and South Asian men, or those with a family history). It gives you a clear picture and, crucially, tells you whether you can manage things with lifestyle alone or whether medication would genuinely help. It is the single most useful thing on this page.

The lifestyle that protects your heart

This is where the real power sits, and it’s not complicated.

Move most days. Regular aerobic exercise — brisk walking, cycling, swimming — is superb for the heart, and adding some strength work protects the muscle and metabolism that support it. Consistency beats intensity.

Watch your waist. Fat around the middle is metabolically active and raises heart risk. Trimming it is one of the most effective things you can do, and it improves blood pressure and blood sugar at the same time.

Don’t smoke. Stopping smoking is the highest-value decision available to your heart at any age, and the benefits begin within weeks.

Keep alcohol-intake sensible. It’s easy to underestimate; a few drinks most nights adds up for blood pressure and weight. Cutting back pays off quickly.

Eat for your arteries. A Mediterranean-style pattern — vegetables, legumes, nuts, olive oil, whole grains and oily fish — has the strongest evidence for heart health. There’s no single miracle food; it’s the overall pattern that counts.

Where omega-3 and supplements fit

On the nutrition side, the omega-3 fats found in oily fish — EPA and DHA — support normal heart and circulatory health, and most New Zealand men simply don’t eat oily fish often enough. If that’s you, a quality fish oil is a sensible top-up; our omega-3 guide for over-50s covers how to choose one. Be clear on what this is, though: omega-3 supports heart health as part of a good diet — it is not a substitute for blood-pressure or cholesterol medication where your GP has advised it, and no supplement prevents heart attacks. If you’re on blood-thinning medication, check with your GP before taking high-dose fish oil.

Where Lifeguard fits is as the daily healthy ageing foundation underneath all of this. Lifeguard Essentials is our doctor-formulated daily base for adults 45+ — supplementary support, but never a replacement for the lifestyle levers or your GP’s advice.

When to see your GP — and when to call 111

Book a routine visit for a heart risk assessment if you’re a man over 45 and haven’t had one, or sooner if heart disease runs in your family. But some things are emergencies: chest pain or tightness, pain spreading to the arm, jaw or back, sudden shortness of breath, or a cold sweat can signal a heart attack. Don’t wait, don’t drive yourself — call 111. Acting fast saves heart muscle and lives.

Frequently asked questions

What heart checks should a man over 50 have in NZ?

The core three are blood pressure, cholesterol (a lipid blood test) and blood sugar (HbA1c). Your GP or practice nurse can combine them into a cardiovascular risk assessment, usually recommended for men from around their mid-40s, and earlier for Māori, Pacific and South Asian men or those with a family history.

Does fish oil protect your heart?

The omega-3 fats in oily fish support normal heart and circulatory health, and a supplement is a sensible top-up if you rarely eat fish. But omega-3 supports a healthy diet rather than replacing medication, and no supplement prevents heart attacks. Check with your GP first if you take blood thinners.

What's the single best thing for my heart?

There's no one thing, but if forced to choose: don't smoke, stay active, and know your numbers. Getting blood pressure, cholesterol and blood sugar checked — and acting on them with your GP — does more than any supplement.

What are the warning signs of a heart attack?

Chest pain or tightness, pain spreading to the arm, jaw or back, sudden shortness of breath, or a cold sweat. These are emergencies — call 111 immediately and don't drive yourself.

Written by Dr Roderick Mulgan, NZ GP and founder of Lifeguard Health. This article is general information, not medical advice. For advice about your own heart health, see your GP. In an emergency, call 111.