The foundations of healthy aging are built long before the first signs of aging appear. From physical activity and sleep to metabolic health and prevention, the choices we make in early adulthood can help shape how we feel, function, and live in later life.
Aging is often treated as something to think about later in life. Conversations about longevity tend to focus on midlife and beyond, when changes in energy, muscle strength, metabolism or hormonal health may become more noticeable. But the foundations of healthy aging are established much earlier, and the habits we develop in our younger years can influence our health for decades to come.
The goal is not to become preoccupied with aging or to attempt to control every aspect of our biology. Rather, it is to recognize that prevention offers opportunities to preserve health before problems develop, supporting not just how long we live, but how well we live.
“Healthy aging starts much earlier than most people realize. Its foundations are laid in childhood and adolescence, and our 20s and 30s are a practical time to become intentional about it. The aim is not to become anxious about aging. It is to build habits that will support us for decades,” says Dr Mayoni Gooneratne, Executive Medical Director at PHC, specialising in preventative and longevity medicine.
Think healthspan, not birthdays
The growing focus on longevity has brought an important distinction into the conversation: the difference between lifespan and healthspan.
Lifespan refers to the total number of years we live. Healthspan, by contrast, describes the years we spend in good health, with the physical capacity and independence to participate in everyday life. It shifts the focus away from simply extending life and towards preserving the ability to move freely, maintain relationships, pursue interests and remain active as we age.
This perspective also challenges the idea that prevention begins at a particular age. There is no universal birthday at which people suddenly need to start thinking about their long-term health. Instead, the transition into adulthood offers an opportunity to establish sustainable habits and identify emerging risk factors.
“There is no magic birthday when prevention suddenly becomes important, and the right approach is very individual. Healthy aging is a lifelong process, and the transition into adulthood is a good opportunity to address emerging risk factors,” Dr Gooneratne explains.
Although genetics, environment and socioeconomic circumstances all influence health, many aspects of daily life remain important throughout adulthood. The earlier these are addressed, the more time there is to build and maintain the physical and metabolic capacity that supports healthy aging.
Dr Gooneratne identifies three priorities before midlife
Healthy aging does not require an elaborate routine or a collection of expensive treatments. Many of the most important foundations are familiar, accessible and supported by substantial evidence.
1. Build physical capacity early
Regular physical activity is one of the most important investments in long-term health. Aerobic exercise supports cardiovascular health, while strength training helps preserve muscle mass, bone strength and the ability to perform everyday tasks independently.
The World Health Organization recommends that adults aim for at least 150–300 minutes of moderate-intensity aerobic activity each week, or the equivalent in vigorous activity, alongside muscle-strengthening activities involving the major muscle groups on at least two days per week.
These recommendations are not simply about fitness or appearance. Maintaining strength, endurance, and balance can help people retain functional independence as they grow older. Building these habits early also makes physical activity more likely to become part of everyday life, rather than something introduced only after physical capacity begins to decline.
2. Establish habits that last
Nutrition, sleep and avoiding tobacco are central to long-term health, yet they can be overshadowed by the appeal of newer wellness trends and longevity interventions.
A balanced dietary pattern, sufficient sleep and regular movement support a range of physiological processes, including cardiovascular and metabolic function. Their benefits accumulate over time, making consistency more valuable than short periods of perfection.
The same principle applies to supplements and other products marketed for longevity. While some may have specific uses in appropriate circumstances, no single supplement can replace the broader benefits of established healthy behaviors.
The most effective routine is not necessarily the most complicated. It is one that can be maintained through different stages of life, adapting to changing circumstances without losing sight of the fundamentals.
3. Understand your risk factors before symptoms appear
Feeling well does not always mean that every aspect of health is optimal. High blood pressure, raised cholesterol and abnormalities in blood glucose can develop without obvious symptoms, which is one reason routine preventive healthcare matters.
Understanding these measures in the context of personal and family medical history can help identify risks and guide appropriate follow-up. Depending on an individual’s circumstances, a clinician may also consider other metabolic indicators, including measures related to glucose regulation.
However, health measurements should be interpreted in context. A single result rarely tells the whole story, and more testing is not automatically better. The appropriate assessments depend on factors such as age, medical history, family history and existing risk factors.
For Dr Gooneratne, prevention should be approached as an opportunity rather than a source of anxiety.
“This should never be a frightening conversation. Starting earlier gives us more opportunities to preserve health, but it is never too late to benefit. Physical activity, for example, is valuable at every stage of life. Healthy aging is about building and maintaining capacity, not achieving perfection,” she says.
Starting earlier does not mean doing everything
The expanding longevity industry can make healthy aging appear dependent on constant monitoring, specialist interventions or expensive technologies. But the fundamentals remain essential, and not every new test or treatment has been shown to improve long-term health outcomes.
A more useful approach is to focus on what is relevant, evidence-based and sustainable. For one person, that might mean becoming more physically active. For another, it could involve addressing high blood pressure, improving sleep or discussing a family history of cardiovascular disease with a healthcare professional.
There is also an important distinction between taking responsibility for health and feeling responsible for every outcome. Aging is a complex biological process, and even people who maintain healthy habits can develop illness. Prevention can influence risk; it cannot guarantee a particular result.
The aim, therefore, is progress rather than perfection.
“You don’t need a perfect routine or a special birthday to begin. Start where you are, build capacity steadily, know your numbers, and protect the years that matter most to you,” says Dr Gooneratne.
A lifelong approach to healthy aging
Healthy aging is not a project that begins when wrinkles appear, energy levels change or a milestone birthday prompts reflection. It is a gradual process shaped by biology, circumstances and the habits maintained throughout life.
Starting earlier creates more opportunities to establish protective behaviours, understand personal risk factors and make informed decisions. But the message is equally relevant to those already in midlife or beyond: it is never too late to take meaningful steps towards better health. Ultimately, longevity is about more than adding years to life. It is about preserving the capacity to enjoy those years, maintaining independence and supporting the health needed to do the things that matter.
The most important time to begin is not a particular age. It is whenever we recognise that the health we want in the future is worth investing in today.
