Everything in this guide
Updated November 15, 2026.
The guide
How to live longer: everything we know about longevity
How to live longer: don't smoke, get fit, get strong and keep your blood pressure down. What ends most lives, what adds years, and a simple plan to start this week.
How to live longer naturally, before any pill
If you want to and can, start with what your body already answers to. Walk, lift, eat whole food, keep one wake time, don't smoke. Then where pills and medicine fit.
How long can a human live?
The record is 122. The most common age to die in the US is 89 for women and 87 for men, far above the 79 average. The limits and the real odds, in charts.
Your life in weeks
Your life as a grid of weeks from the US life table, the summers ahead, the days left with your parents, and how Americans spend a lifetime. Averages, drawn.
What actually kills people, decade by decade?
Accidents lead from 25 to 44, cancer from 45 to 64, heart disease from 65 on. Heart disease and cancer killed more Americans in 2024 than the next eight causes combined.
Are you afraid of the right things?
A shark kills about 1 in 4.3 million Americans, a fall 1 in 89 and heart disease 1 in 6. What people fear beside what kills them, with the real odds.
What adds the most years? The 20 habits, ranked
Not smoking first, then fitness and strength. Then blood pressure, a steady wake time, food, waist and drink, and twelve smaller habits. Each with its study.
Ten small changes that add healthy years
Walk 11 minutes a day, lift twice a week, check your blood pressure, cut fried food, keep one wake time. Ten small changes, each sized from its study.
What should you measure first?
The free tests first: get up off the floor without your hands, stand on one leg, hang from a bar and take a week of home blood pressure. Then VO2 max and blood.
How long do people really live?
79.0 years at birth in 2024, but that's the wrong number for an adult. A US woman who reaches 65 lives to about 86 on average, and a man to about 83.
Why do bodies age?
Cells take damage every day and fix most of it. With age the repairs fall behind, in a dozen ways scientists can name. Most anti-aging drugs only work in mice so far.
How do you keep your healthy years?
Keep your legs strong, your balance sharp and your walking brisk. They decide whether you stay independent, and they respond to training at any age, even at 90.
What do people who reach 100 have in common?
Good habits get people into their late 80s. Reaching 100 takes genes and luck too, and many famous record ages, blue zones included, don't survive a birth certificate.
How do you track your own aging?
Daily, steps and wake time. Weekly, resting heart rate and weight. Every few months, VO2 max, floor tests, blood pressure and blood. Never average biological ages.
Questions
Are biological age tests accurate?
Not enough to trust one result. They disagree with each other, and the same sample run twice gave ages up to 9 years apart. Track markers you can change instead.
Can you reverse your biological age?
You can move the markers, and your fitness age moves every time your fitness does. Nobody has shown that turning back a DNA clock adds years to a life.
Do GLP-1 drugs help you live longer?
In people with heart disease and extra weight, semaglutide cut heart attacks, strokes and heart deaths by 20% in a big trial. Nobody has tested it in healthy people.
Does blood pressure affect how long you live?
Strongly, and it's the number most people don't know. About 4 in 10 Americans with high blood pressure aren't aware of it. A week of home readings answers it.
Does drinking shorten your life?
Heavy drinking does, by years. Light drinking doesn't add years once studies stop counting former drinkers as non-drinkers. Fewer is safer, and none is fine.
Does grip strength predict how long you live?
It does. Each 11 pounds (5 kg) less grip went with 16% higher risk in 139,691 adults, a better predictor than blood pressure. Hang from a bar and carry heavy bags.
Does lifting weights help you live longer?
Yes. In 147,374 Americans, 90 to 120 minutes of strength training a week went with 13% lower risk on top of cardio, with no extra gain past 2 hours.
Does losing weight help you live longer?
For a big waist or a lot of extra weight, yes. A few extra pounds carried little risk in the big US study. The tape round your waist tells you more than the scale.
Does sitting all day shorten your life?
Mostly through the moving you don't do. In a million adults, about an hour a day of brisk activity cancelled the extra risk of sitting 8 hours. Find that hour.
Does sleep affect how long you live?
Yes, and the time you get up counts more than the hours. In 60,977 adults, regular sleep timing predicted a longer life better than hours slept. Fix your wake time first.
Does vaping shorten your life?
Nobody knows yet, since vapes are too new for lifespan studies. Switching fully from cigarettes is very likely better than smoking, and not vaping beats both.
Does VO2 max predict how long you live?
Strongly. The least fit quarter had about 5 times the risk of the fittest 2% in 122,007 treadmill tests, a bigger gap than smoking. And it's a number you can raise.
Does walking speed predict how long you live?
In adults over 65, closely. A normal pace of about 2.2 mph (1 meter a second) or faster went with longer-than-average survival. Time yourself over 13 feet.
Does your family history decide how long you'll live?
Less than people think. A parent's early heart disease is a real warning, but a long-lived grandmother counts for little until very old age. Habits move more.
How accurate are life expectancy calculators?
Good for groups, rough for one person. Trust one that gives a range and prints its formula, and walk away from any that gives you a date.
How do you live longer after 65?
Shift from prevention to reserve: strong legs, good balance, enough protein and a brisk walking pace, since falls and frailty decide how long you stay independent.
How long should you be able to stand on one leg?
At least 10 seconds after 50. In 1,702 adults aged 51 to 75, one in five couldn't, and they had 84% higher risk over 7 years. Balance improves with practice.
How many years does smoking take off your life?
More than 10. Quitting before 40 avoids about 90% of the extra risk, and people who quit at 45 to 54 still gained about 6 years in US data.
How much exercise do you need to live longer?
The US guideline, 150 minutes of brisk activity plus two strength days a week, gets most of the benefit. More keeps helping up to about 3 to 5 times that.
Is 50 too late to start exercising?
No. The biggest US study of habits and lifespan measured from 50, and people who got active in midlife had the same drop in risk as people active all their lives.
What age will I die?
Nobody can give you a date. A woman of 50 reaches about 84 on average and a man about 80, and the way you live moves your own number by years.
What are the chances of living to 90 or 100?
At 65, about 36 in 100 women and 25 in 100 men reach 90, and about 3 women and 1 or 2 men in 100 reach 100, by the 2024 US life table.
What is biological age?
Three different things: your fitness tests, your blood, your DNA. They measure different parts of aging, they're never averaged, and the free one is the most useful.
What is healthspan?
The years you live in good health. Americans have the widest gap between lifespan and healthspan of 183 countries, about 12.4 years. The same habits add both.
What is the average life expectancy in the US?
79.0 years at birth in 2024: 81.4 for women and 76.5 for men. But that counts everyone who dies young. At 65, Americans can expect another 18 to 21 years.
What is the best diet for a long life?
No branded plan wins, and four healthy patterns did about as well. Eat mostly vegetables, fruit, beans, nuts, whole grains and fish, with little processed meat or soda.
What is the sitting-rising test?
Sit down on the floor and stand back up, using as little support as you can. A score of 0 to 4 out of 10 went with about 4 times the risk of a perfect 10.
Which blood tests matter most for a long life?
ApoB and HbA1c first. One counts the particles that clog arteries, the other shows your 3-month blood sugar. Check blood pressure beside them.
Why do women live longer than men?
In the US the gap is about 5 years: 81.4 against 76.5 in 2024. Biology explains a year or so. Most of the rest is how men live, and women spend more years unwell.
Why does life expectancy go up as you get older?
Every birthday takes away the chance of dying younger. A woman of 65 reaches about 86 on average, not 81, and a woman of 80 reaches about 90.
Myths
Are blue zones real?
Sort of. The habits hold up, but many record ages don't. Missing centenarians, pension fraud, a fading edge, and what these places can still teach us.
How long you live is mostly in your genes
No. In twin studies genes explained about a quarter of the differences in lifespan, and in family trees under a tenth. Genes count most in very old age.
After 50 it's too late to add years
No. In the biggest US study of habits and lifespan, five habits at 50 meant 12 to 14 more years, and people who quit smoking at 45 to 54 gained about 6.
A glass of red wine a day helps you live longer
Not the way you think. The non-drinkers in the old studies included people who'd quit because they were ill. Kept apart from them, light drinkers lived no longer.
Cardio is all you need to live longer
No. In 147,374 US adults, 90 to 119 minutes a week of lifting went with a 13% lower death rate on top of cardio, and the lowest risk came with plenty of both.
You need 10,000 steps a day
Sort of. The number comes from a 1965 pedometer's name. For adults 60 and over, the lower death risk leveled off at 6,000 to 8,000 steps a day.
Longevity pills like NMN and resveratrol add years
No. None has a human lifespan result. NMN and NR nudged markers in short trials, resveratrol didn't help mice live longer, and rapamycin works in mice only so far.
Eating far less will make you live longer
Sort of. Eating less lengthens life in mice, the two big monkey studies split, and in people a 2-year trial improved markers. Nobody has measured years.
Eight hours a night is what counts
Not the way you think. In 60,977 UK adults wearing activity trackers, regular bed and wake times predicted death better than hours slept. Fix the wake time first.
Tools
How long will I live?
Your estimate as a range beside the US average, and the habit costing you the most years.
How long do people my age live?
The average age reached and the odds of 80, 90 and 100, from the US life table.
The floor test
Get up without your hands, stand on one leg, hang from a bar. Scored against the studies.
What quitting gives back
The years quitting gave back at your age in the US data.
What a study means for you
A headline's risk figure turned into real odds at your age.
Your personalized guide
A two-minute quiz: your biggest lever for more healthy years, and your own short guide.
Tips, studies and resources
Every tip and study on this site, one line each, with a copy button to pass it on.
Track it in Gyroscope
Your fitness tests, VO2 max, sleep and blood markers in one place.
