We all want to age well; remain as healthy as possible, for as long as possible.
How to achieve it is the true question - and it doesn’t come down to a single secret. Healthy ageing happens with thousands of small decisions, repeated time and time again, year after year, until they become healthy habits.
The good news is that the healthy lifestyle habits with the strongest evidence behind them aren't especially glamorous. Nobody needs a biohacking routine or a five-figure supplement stack. Sleep, exercise, nutrition and stress management, done consistently, do most of the heavy lifting.
Here's what the research on how to live longer actually says about each habit.
Sleep: the most underrated habit on this list
Sleep is often treated as an afterthought when it comes to staying healthy as you age, but that’s a mistake. A 2026 analysis of half a million adults, published in Nature, found that consistently sleeping between six and eight hours a night was linked to slower biological ageing across nearly two dozen different ageing markers - while both shorter and longer sleep were associated with faster ageing and higher disease risk.
The National Sleep Foundation's guidance broadly agrees, recommending seven to eight hours a night for adults aged 65 and over, similar to the range recommended for younger adults. What may change with age isn't how much sleep the body needs, but how well it gets there with less deep, restorative sleep and more fragmented nights.
Keeping a consistent bedtime, limiting screens beforehand and getting daylight exposure earlier in the day all help protect sleep quality, not just sleep duration.
Exercise: movement and muscle, not just cardio
A large 2025 analysis in The Lancet Public Health put a number on daily steps for the first time with real confidence: around 7,000 steps a day appears to be the point at which the risk of cardiovascular disease, type 2 diabetes and depression drops sharply - alongside a 47% lower risk of dying from any cause.
Walking alone isn't the full picture, though. Muscle mass matters just as much, arguably more, as people get older. A meta-analysis covering almost two million people found that lower muscle strength roughly doubles mortality risk - which is why resistance work, wall squats, planks, simple bodyweight exercises, deserves a place alongside walking rather than being treated as optional extra credit. And these exercises can lower blood pressure, too.
It doesn't take long: research suggests as little as 21 minutes a week of strength activity is enough to make a measurable difference.
Nutrition: fewer rules, better defaults
Nutrition for healthy ageing doesn't need reinventing: the Mediterranean diet remains the most consistently evidenced eating pattern for extending healthy years - built around vegetables, wholegrains, legumes and olive oil, with fish and modest amounts of dairy, and red or processed meat kept occasional rather than routine.
The colourful plant nutrients called polyphenols found throughout that way of eating do more than simply add colour to a plate; they're directly involved in reducing the oxidative stress and inflammation that drive cellular ageing.
Aiming for a wide mix of colourful vegetables and fruit each day, rather than the same two or three on repeat, is one of the simplest nutritional habits worth adopting.
Stress management: not a luxury
Stress management gets the least attention of the four , yet chronic stress isn't just unpleasant: it appears to leave a measurable mark on the body. In a landmark 2004 study, researchers found that women under prolonged psychological stress had shorter telomeres, the protective caps on the ends of chromosomes that shorten with age, equivalent to roughly nine to seventeen years of additional cellular ageing.
The mechanism isn't mysterious. Chronically elevated cortisol drives inflammation and oxidative stress, the same processes behind much of cellular ageing generally. None of this requires a formal meditation practice to address, though many people find one helpful.
A regular walk, time with people who matter, a nap, a hobby that fully absorbs attention - just about anything that reliably brings stress levels back down - counts as effective stress management.
Putting it together
None of these four habits are answers on their own. Poor sleep makes it harder to stick to exercise, chronic stress disrupts both sleep and appetite, and a poor diet undermines the energy needed to stay active. They reinforce each other, for better or worse, which is really the argument for treating healthy ageing as a small set of daily habits rather than a single big intervention.
Sounds daunting? It doesn’t have to be. The encouraging part is that none of it demands perfection. Most of the research behind these habits comes from people who were simply consistent, not extreme - which makes healthy ageing considerably more achievable than the wellness industry may suggest.
Part of a Series
This article is part of series on staying healthy as you get older and improving your quality of life.
It’s not only a goal almost everyone shares, but has huge implications on national healthcare spending, productivity and economic resilience.
It strongly recommends the Mediterranean diet as the best way of eating but recognises that maintaining strength and aerobic fitness is also a critical part of a healthy ageing lifestyle.
It also suggests a supplement to help reach the increased plant nutrient levels that you need as you get older.
DailyColours® contains 161 plant nutrients – nutrients that are missing from an ordinary vitamin and mineral pill. Clinical trials show that it offers Mediterranean diet benefits in a daily supplement. You can see it here.
Note: The content on this site is intended for general wellness and informational purposes only. It is not personalized medical advice. Consult a healthcare professional before making any changes to your diet, exercise, or lifestyle routines.
Author: Colin Rose
Colin Rose BSc is a health and longevity researcher and author with more than 30 years of experience researching healthy ageing, nutrition, and longevity. He is a Fellow of the Royal Society of Arts and a Senior Associate of the Royal Society of Medicine.