What does 'healthy life expectancy' actually mean?

Healthy life expectancy (also called health-adjusted life expectancy) is the average number of years a person can expect to live in full health — without significant chronic disease or disability limiting their daily functioning. It is distinct from life expectancy, which simply counts all years lived regardless of health status. The gap between the two reflects, on average, how many years people spend in diminished health before they die.

Can I actually do anything in my 40s to change how I age?

The evidence says yes — with important caveats. The 40s and 50s are when many of the conditions that drive the healthy-life-expectancy gap begin to accumulate: blood pressure creeps upward, blood glucose drifts, sleep quality deteriorates, mood disorders go undertreated. None of these are inevitable consequences of ageing, and all are more tractable at 45 than at 65. The best evidence supports addressing cardiovascular risk factors, maintaining physical activity, treating depression and sleep problems when they appear, and having a GP who knows your longitudinal history and can track the pattern as it emerges.

Living longer, but sicker: what healthy ageing means for women now

What just happened

A commentary published this week in InSight+, the Medical Journal of Australia’s news and commentary platform, has put a precise number on something many people approaching midlife sense but rarely articulate: living longer does not automatically mean living well.

The data comes from the AIHW’s Australia’s Health 2026 report, the biennial national health stocktake. Australian women now live to an average of 85.5 years. Men reach 81.6. But healthy life expectancy — the years spent in genuinely full health, without the weight of chronic illness or significant disability — is 73.8 years for women and 71.7 years for men. That leaves a gap of nearly 12 years for women and just under 10 for men: years that will be lived, on average, in some degree of diminished health.

More troubling than the gap itself is the direction of travel. The AIHW data shows that while life expectancy has continued to rise since 2003, the average time spent in poor health has also increased. We are not simply gaining good years at the end of life. We are gaining years — but the proportion of those years spent unwell has grown alongside them.

Professor Lauren Ball, Professor of Community Health and Wellbeing at the University of Queensland, writing for InSight+, names the tension plainly: “Living longer doesn’t necessarily mean living well.” She notes that many Australians live for years with one or more chronic conditions while continuing to work, volunteer, and travel — but that this does not dissolve the question of whether those conditions were preventable or at least deferrable.

For any woman in her 40s trying to think clearly about the next forty years, this is a number worth sitting with.

The both-and

The data is real — but it does not mean inevitable decline

It would be easy to read these figures as a forecast of doom. Twelve years of diminished health sounds like a sentence. But the report and its commentators are explicit that the presence of chronic disease and the quality of life lived alongside it are not the same thing. Professor Ball notes that many Australians with chronic conditions continue to work, travel, and live with genuine meaning and function. Management of chronic conditions has improved substantially — medicines work better, people are diagnosed earlier, and the standard of care for the conditions that drive the gap has risen considerably even within the last decade.

The healthy life expectancy figure is a population average. It describes the shape of the terrain, not any individual’s personal trajectory.

The trend in the wrong direction matters

That said, trends carry meaning. If healthy life expectancy were rising at the same rate as overall life expectancy, the gap between the two would be stable. The AIHW data showing that years spent in poor health have increased since 2003 means we are not achieving that. The health system has become very good at keeping people alive — through better treatment of acute events like heart attacks, stroke, and some cancers — but less successful at preventing the chronic conditions that accumulate in the decades before those events arrive.

The conditions driving the gap are largely those that begin in midlife rather than old age: hypertension, type 2 diabetes, osteoarthritis, depression, chronic pain, obstructive sleep apnoea. These are not diseases that appear suddenly at 65. They are conditions that develop across the 40s and 50s, often without formal diagnosis, and become entrenched by the time they are clearly symptomatic. The system that is very good at treating the 65-year-old has often had thirty years of unaddressed risk in the 35- to 64-year-old that preceded that presentation.

What this reframes about preventive medicine

The longevity paradox is useful because it shifts the framing of preventive care away from abstractions — “you might get sick one day” — toward something more concrete: the choices and clinical decisions made in your 40s and 50s will directly shape the quality of the twenty or thirty years that follow.

There is no single intervention that reliably translates into twelve fewer unhealthy years. But the evidence supports a set of actions that address the drivers of the gap: managing blood pressure before it causes cumulative vascular damage, treating depression rather than simply accommodating it, addressing sleep disorders that are fragmenting rest and elevating cortisol, staying on top of blood glucose trends before they meet the criteria for a formal diagnosis, maintaining the kind of physical strength and balance that prevents the falls and functional decline that compound in later years.

None of those things happen automatically. They require a general practice relationship that is longitudinal — one where a GP knows your history across time and can see the emerging pattern before you can.

My two cents

If you are 45 and reasonably well, this data is not a reason for alarm. It is a reason for perspective.

The gap between how long you will live and how well you will live those years is not fixed. It is being shaped, right now, by what is and is not being addressed in your health — blood pressure that has been slightly elevated for two years and has not yet prompted treatment, mood that has been flat but not quite clinical, sleep that has been fragmented for so long it feels like your normal, a perimenopause that has been managed by endurance rather than by clinical engagement.

The most useful question to bring to your next general practice appointment is not “am I sick?” It is: where is my health trajectory heading, and what is worth addressing proactively at this stage?

The advantage of asking that question at 45 rather than 65 is that the conditions are still tractable, the trajectory is still modifiable, and the GP relationship that will coordinate your care across the next three decades can be built on knowing your history — not catching up to it.

Verdict: yes — worth knowing about.

Sources cited

InSight+ MJA — Australians live longer than previous decades but spend more years in poorer health (July 2026). https://insightplus.mja.com.au/2026/27/australians-live-longer-than-previous-decades-but-spend-more-years-in-poorer-health
AIHW — Australia’s Health 2026 report. https://www.aihw.gov.au/reports/australias-health/australias-health-2026