The best midlife investment you can make has nothing to do with money

Opinion

April 19, 2026 — 5:01am

We are quite sophisticated, as a nation, about investing our money. Most people know they have superannuation. Some talk about compound growth at dinner parties. And on the whole, most people know that starting early and staying consistent is how you build real wealth over time.

And then we entirely ignore the same logic when it comes to our bodies.

I’ve spent the past decade or more talking to Australians in their 50s, 60s and 70s about what they wish they’d done differently. And when people get to retirement, financial regrets are there, sure, but more significantly, there’s an awful lot of health regrets.

Nobody says, “I wish I’d saved less.” Plenty of people say “I wish I’d started taking my health seriously ten years earlier.”

It’s time we started thinking about our health the same way we think about our money, as a compounding investment. One where the returns grow quietly in the background, and where starting early makes an extraordinary difference to what you end up with.

Let’s face it: a 50-year-old Australian today has a one in four chance of living into their mid-90s. That is a long runway. And what the science of modern ageing is telling us, with increasing evidence, is that the habits you build in your 50s are the primary determinant of how you’ll live in your 70s and 80s.

The habits built consistently in your 50s have decades to compound into better health outcomes.

It’s not your genetics, or your luck, or your bank balance that make the most significant difference. It’s the effort you put into your health, early.

I think we need to be focused on our health span: the years we spend genuinely healthy, mobile, independent and cognitively sharp, living our lives to the fullest. It’s far more important than our lifespan, how long we simply exist.

And unlike lifespan, health span is something we can meaningfully influence, through consistent, unsexy, non-negotiable habits. A bit like the ones we’ve learned in financial planning.

So let’s think about what compounds when we do it well.

Muscle mass is probably the most underappreciated area to invest. We lose it naturally from our mid-30s onward, and the loss accelerates if we don’t actively counter it. Muscle isn’t just about looking strong. It’s metabolically active tissue that protects joints, dramatically reduces fall risk as you age, and it’s one of the most consistent predictors of longevity in the research literature.

Strength training twice a week is not something to do just for your vanity. It is a long-term investment with genuinely extraordinary returns.

Cardiovascular fitness compounds too. Heart disease doesn’t arrive suddenly. It builds over years from rising blood pressure and gradually increasing cholesterol levels.

Regular aerobic exercise, a Mediterranean-style diet and routine GP check-ups are the best tools to prevent a crisis. Under Medicare, Australians over 45 are entitled to a free cholesterol screening every five years. Many people haven’t used it.

Bone density peaks in your 30s and declines from there, accelerating sharply for women after menopause. Osteoporosis is often called a silent disease because most people don’t know they have it until something breaks.

The interventions are simple really: weight-bearing exercise, calcium, vitamin D, and a bone density scan on your screening list if you’re at higher risk. But only if you start before the damage is done.

Then there’s inflammation, often it’s chronic, low-grade, largely invisible. But we now understand it’s a driver of heart disease, diabetes, cognitive decline and some cancers. And it’s influenced by sleep, stress, diet and how much movement you’re doing regularly. Managing inflammation proactively is not a wellness trend to catch up on. It is high-priority chronic disease prevention.

Then there are the ones most of us overlook because they’re really unsexy to work on.

Hearing and vision both deserve a specific mention here because the research connecting them to dementia should be shifting your internal conversation entirely. Untreated hearing loss is now one of the most significant modifiable risk factors for cognitive decline.

Looking after your hearing is more impactful than many of the other risk factors we obsess over. Untreated vision loss was only recently added to the Lancet Commission’s list of modifiable dementia risk factors.

These really aren’t things to push off to the future. They are major risk levers that most Australians in midlife haven’t pulled yet, simply because nobody told them of the risks that they would turn into compound health disasters later in life.

Book the hearing test. Book the proper eye check, and not just for a new prescription, but also to ensure you’re checking for early signs of macular degeneration, glaucoma and cataracts. Early detection and treatment is the entire point of preventive health checks – seriously.

If we are focused on compound investing in our health, then we need to remember the biggest lesson of compounding: the timing matters enormously. A dollar invested at 40 and consistently monitored for growth is worth far more at 70 or 80 than a dollar invested at 55. The same principle really does apply here.

The habits built consistently in your 50s have decades to compound into better health outcomes. The person who starts strength training at 52 is in a fundamentally different position at 72 than the one who starts at 62. The person who catches a cholesterol problem at 48 has far more options than the one who has a cardiac event at 60 then starts to eat better and exercise.

Midlife isn’t when health becomes urgent. It’s when it becomes important and that’s the difference. It’s when the investment window is still wide open, and you’ve got time to make a huge difference.

So, if the compounding logic has landed for you today, and you’re ready to start investing in your health, here’s what you can actually do.

• Get your numbers checked. Blood pressure, cholesterol, blood glucose – they all matter. If you’re over 45, you’re entitled to a free cholesterol screening under Medicare. Book it if you haven’t used it.
• Start strength training. Book yourself in for a twice a week habit and make it non-negotiable. Muscle mass is one of the strongest predictors of longevity we have. It’s never too late to start building it, but earlier is always better.
• Book the preventive appointments you’ve been putting off. A proper eye test, not just for glasses, but to check for early macular degeneration, glaucoma and cataracts. And a hearing test because untreated hearing loss is one of the most significant modifiable risk factors for dementia we know of.
• Move every day. Walk, dance, jump rope or swim. Consistency is the compound interest of cardiovascular health.
• Take inflammation seriously. Sleep, stress, processed food and alcohol all feed it. Small dietary changes, tracking your inflammation markers and proactively addressing their source, may offer you some meaningful disease prevention for the future.

The best time to start was ten years ago. The second-best time is now.

Bec Wilson is author of the bestseller How to Have an Epic Retirement and the newly released Prime Time: 27 Lessons for the New Midlife. She writes a weekly newsletter at epicretirement.net and hosts the Prime Time podcast.

• Advice given in this article is general in nature and is not intended to influence readers’ decisions about investing or financial products. They should always seek their own professional advice that takes into account their own personal circumstances before making any financial decisions.

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