There is a piece of exercise equipment installed in nearly every building you enter, and it costs nothing.

The interesting part is how little of it seems to be needed. In one large device-measured study, about five minutes a day of stair climbing tracked with the same cardiometabolic benefit as more than an hour of walking.

Key takeaways

• Roughly 5 minutes a day of stair climbing was associated with the same favourable cardiometabolic profile as about 64 minutes a day of walking (Ahmadi et al. 2024, Diabetologia).

• Around 2.6 hours a day of standing was needed for an equivalent association.

• No upper limit to the benefit appeared for any activity type.

• Your flights chart lurches because climbing is optional in a way walking is not. It measures your terrain more than your effort.

Why is climbing so disproportionately effective?

Because you are lifting your entire body weight against gravity, repeatedly, which is a fundamentally different demand from moving it horizontally.

That shows up in the numbers. Researchers measured activity type rather than just total movement, using devices rather than self-report, and compared how much of each was associated with a favourable composite cardiometabolic profile (Ahmadi et al. 2024):

Five minutes against an hour is a striking ratio, and it is the clearest argument for stairs there is.

Two caveats keep it honest. This is an observational association, not a trial, so people who climb more stairs may differ in other ways. And "five minutes of stair climbing" is a meaningful amount of hard work, not a stroll: it is likely six or seven separate trips up a few flights across a day.

The same analysis found no upper limit to the benefit for any activity type, and that any amount of running was associated with better cardiometabolic health. Sitting ran the other way, with the association becoming markedly less favourable beyond about 12.1 hours a day.

What counts as a flight?

Altitude gained, not steps taken, and this is the part that surprises people.

Your device tracks climbing with a barometric sensor, which detects the small drop in air pressure as you gain height. It does not know or care whether that gain came from a staircase or a hill. The common convention is that roughly ten feet, about three metres, of ascent registers as one flight.

Two consequences follow.

Hills count. A walk through a hilly neighbourhood banks flights without a single stair, and a proper hike can post a number that makes your office days look flat, because they were.

Weather and lifts confuse it. Barometric pressure changes with weather, and a fast lift produces a pressure change that can occasionally register. Neither is common enough to matter across a week.

Why does my flights chart look like a skyline?

Because climbing is optional in a way that walking is not.

You cannot get through an ordinary day without taking some steps. You can very easily get through one without encountering a single staircase. So flights do not really measure your effort; they measure your terrain.

Twelve on Tuesday, zero on Wednesday, three on Thursday is not inconsistency. It is a week that contained a train station, a working-from-home day, and a trip to a first-floor office.

That makes the metric read differently from the others:

• Do not compare days. Compare like days, or compare weekly totals.

• A zero is usually a building, not a decision. A flat office and a flat home produce a flat chart no matter how willing you are.

• The trend that matters is your weekly floor, not your peaks. A single hike is lovely and tells you nothing about your habits.

This is the opposite of steps, which accumulate whether you intend them to or not, and it is why the two charts should be read differently.

How do you actually get more of them?

By removing the decision, because the difficulty was never the problem.

The obstacle with stairs is not that they are hard. It is that every staircase arrives as a fresh negotiation, and negotiations are easy to lose on a tired afternoon. The fix is a standing rule that answers the question in advance:

• The one-flight rule. Any trip of one or two floors is stairs, no debate.

• The always-up rule. Take the lift down if you like, but up is on foot.

• Anchor it to a place. The station, the office, the car park. A rule tied to a specific staircase is easier to keep than a general intention.

The exact rule matters less than having one. Given that habit automaticity takes a median of 66 days to build and that missing a single day does not undo it, the goal is a rule you can keep imperfectly for two months rather than a perfect one you abandon in a fortnight.

Stairs also happen to be the densest form of the everyday movement that NEAT describes: real effort, in transitions you were making anyway, with no kit and no scheduling.

Should I trust the number?

As a personal trend, yes. As a precise count, less so.

The barometric method is reasonable at what it does, but it is measuring air pressure rather than your legs, so a flight is an inference about altitude. Comparing your count against someone else's compares two different buildings and two different commutes more than two different bodies.

And as with exercise minutes, the metric can only see what it can sense. A staircase you took while your phone sat on the desk did not happen as far as your chart is concerned.

Frequently asked questions

How many flights of stairs a day is good?

There is no official target, but one device-measured study found that about five minutes a day of stair climbing was associated with the same favourable cardiometabolic profile as roughly 64 minutes of walking (Ahmadi et al. 2024). Five minutes is meaningful work, likely several separate climbs across a day.

What counts as one flight on my watch?

Altitude, not stairs. Devices use a barometric sensor to detect the pressure change as you gain height, and roughly ten feet or three metres of ascent registers as one flight. Hills count the same as staircases.

Why do my flights vary so much day to day?

Because climbing is optional in a way walking is not. You cannot avoid taking steps, but you can easily pass a day with no staircase at all. Flights largely reflect the buildings and terrain your day contained rather than how hard you tried.

Is stair climbing better than walking?

Per minute, the association was substantially stronger, but they are not interchangeable. Walking is something you will do for an hour; stairs are something you will do for five minutes. Both showed benefit with no upper limit in the same analysis, so the practical answer is to do the one your day makes available.

Do hills count as flights?

Yes. The sensor measures altitude gained and cannot distinguish a staircase from a slope, so a hilly walking route banks flights without a single stair.

Knit shows patterns, not diagnoses. Talk to a clinician about readings that concern you.