We don't ask only how long we will live, but how long we will stay healthy.

Modern medicine has significantly extended life expectancy. However, additional years don't automatically mean more years spent in good health. That's why healthspan — a healthy lifespan — has become one of the key topics in longevity medicine.

The goal is not merely to delay death. The goal is to preserve mobility, cognitive abilities, independence and quality of life for as long as possible.

Lifespan and healthspan are not the same

Lifespan refers to total life expectancy — the number of years from birth to death. Healthspan refers to the years of life spent in good health, without significant limitations that disrupt everyday functioning.

The World Health Organization uses a related indicator, HALE (healthy life expectancy), which estimates the expected number of years lived in full health, taking into account years spent with illness or disability.

Before the COVID-19 pandemic, global life expectancy rose from 66.8 years in 2000 to 73.1 years in 2019. Over the same period, healthy life expectancy rose more slowly — from 58.1 to 63.5 years. This shows that extending life and extending healthy life are not the same thing.

What does healthspan look like in real life?

Imagine two people who are both 75 years old.

The first moves regularly, is independent, travels, reads and maintains social contacts.
The second has several chronic conditions, has difficulty moving and depends on help from others.

Their chronological age is the same, but their functional capacity and healthy life expectancy are not. This is precisely why we don't measure successful aging only by the number of years, but also by the ability to live those years with quality.

Why do people age at different rates?

Genetics influences risks and biological processes, but it is not the only factor. The course of aging is shaped by a complex interaction of heredity, lifestyle, environment, health conditions and access to healthcare.

Diet

Dietary patterns affect cardiometabolic health, body mass and the composition of the gut microbiome.

Physical Activity

Aerobic activity, strength and balance exercises help preserve muscle, bone, mobility and functional independence.

Sleep

Regular, quality sleep supports recovery, mental health and the regulation of numerous physiological processes.

Stress

Prolonged, uncontrolled stress can worsen sleep, health-related behaviors and the control of chronic conditions.

Social Connections

Social connectedness and meaningful participation in community are important for mental health and healthy aging.

Prevention and Treatment

Controlling blood pressure, blood glucose, lipids and other risk factors can help prevent, delay or better control disease.

Healthspan and biological age

Chronological age tells us how many years have passed since birth. Biological age attempts to describe how well various organ systems function compared to expected values for a given age.

The assessment may include a clinical examination, functional status, body composition, physical fitness and standard laboratory markers. Certain omics and epigenetic tests can provide additional information, but no single test represents a definitive or universally accepted measure of biological age. Results are therefore interpreted within a clinical context, not in isolation.

Where do personalized and functional medicine fit in?

A personalized approach connects symptoms, medical history, examination, standard laboratory work and — when there is a clear clinical indication — additional functional or genetic testing. Their value lies not in the greatest possible number of analyses, but in helping make more precise decisions.

Genetic tests may indicate hereditary variants associated with certain biological pathways, but they do not determine an inevitable health outcome.
Hormonal testing can supplement the assessment of selected symptoms and therapeutic questions, alongside standard clinical work-up.
Microbiome analysis can provide additional insight into the composition of the gut microbial community, but findings must be interpreted carefully and connected with symptoms and other results.

The goal is not to promise that every disease can be prevented. The goal is to identify modifiable risk factors earlier, apply interventions of proven benefit, and monitor their effect.

What can we do today?

  • Move regularly. Aim for 150–300 minutes of moderate aerobic activity per week or an equivalent amount of more vigorous activity, in line with your health condition.
  • Do strength training at least two days a week and include balance exercises, especially at an older age.
  • Choose a Mediterranean dietary pattern: vegetables, fruit, legumes, whole grains, nuts, fish and olive oil.
  • Protect your sleep: keep a roughly consistent bedtime and wake time and reduce evening sleep disruptors.
  • Don't smoke, limit alcohol, and regularly check your blood pressure, blood glucose, lipids and body composition.
  • Nurture close relationships, mental activity, a sense of purpose and activities that bring you satisfaction.

Conclusion

Longevity is not a quest for immortality. It is the science of how to stay as healthy, functional, independent and present in our own lives as possible, for as long as possible.

The most important question is no longer just: "How long will I live?" A far more useful question is: "What can I do today to stay healthy, active and independent for as long as possible?"

That is the essence of the healthspan concept — not just more years of life, but more life in those years.

Sources

  • World Health Organization - Life expectancy and healthy life expectancy
  • World Health Organization - Physical activity
  • National Institute on Aging - What do we know about healthy aging?
  • National Institute on Aging - Cognitive health and older adults

Note: This text is for educational purposes and does not replace an individual medical examination, diagnosis or treatment.