Who said sitting is the new smoking?

The phrase is widely attributed to Dr. James Levine of the Mayo Clinic, who studies sedentary behavior. He used vivid language to describe the risks of prolonged sitting, though he has since softened the comparison.

Is sitting actually as bad as smoking?

No, the comparison is overstated. The American Journal of Public Health has noted that excessive sitting, around 8 or more hours a day, is associated with roughly a 10 to 20 percent higher risk of premature death and some chronic diseases, while smoking raises that risk by roughly 180 percent. Prolonged sitting is a real, independent health risk, but it is not literally equivalent to smoking.

Can exercise cancel out a day of sitting?

Not entirely. Reviews of the evidence suggest that a single workout does not fully undo the effects of many unbroken hours of sitting. The most useful takeaway is to do both: exercise regularly and also sit less by breaking up long sitting stretches throughout the day.

desk health · honest answers

Is sitting really the new smoking?

By the team at Supermoo · a free movement reminder app

Short answer: no, not literally. The phrase is catchy but overstated. Prolonged sitting is a real, independent health risk worth taking seriously, just nowhere near the scale of smoking. The takeaway that holds up: sit less, move more often.

You've heard it. It's on posters in offices and in the mouth of every standing-desk salesperson: sitting is the new smoking. It's a great line. Is it true? Mostly not, but the kernel underneath it is worth understanding.

Where the phrase came from

The line is widely attributed to Dr. James Levine, a researcher at the Mayo Clinic who has spent years studying sedentary behavior. He summed up his concern with memorable drama, describing sitting as more dangerous than smoking and more treacherous than parachuting. It made headlines, which is exactly what a phrase like that is built to do. Notably, even Levine has since softened the comparison.

Why experts say it's overstated

The numbers don't support a one-to-one comparison. As the American Journal of Public Health has noted, excessive sitting, on the order of eight or more hours a day, is associated with roughly a 10 to 20 percent higher risk of premature death and certain chronic diseases. Smoking raises that risk by roughly 180 percent. Those are not the same league. Some researchers have suggested that "obesity is the new smoking" would be a closer metaphor, and that the deeper issue is inactivity in general, not the chair specifically.

~10-20% vs ~180%

the rough premature-death risk bump from heavy sitting, versus smoking. real, but not equivalent.

But here's the part that does hold up

Strip away the scare line and a genuinely useful finding remains: prolonged sitting appears to be its own risk factor, somewhat separate from how much you exercise. Cardiology researchers reviewing the evidence in the journal Circulation went as far as to say that no amount of physical activity fully offsets the effects of sitting for many hours each day. In other words, a 6 a.m. workout is great, and it doesn't buy you a free pass to sit motionless for the next twelve hours.

That reframes the whole thing. The fix for too much sitting isn't necessarily more exercise. It's less uninterrupted sitting. Breaking up long stretches with brief, regular movement is what the research keeps pointing to.

So what should you actually do?

Skip the guilt, keep the habit. You don't need to fear your chair or stand all day. You just want to interrupt the long, still stretches: stand up and move for a minute or two every half hour or so. Do that, keep exercising when you can, and you've captured essentially all of the real benefit without any of the hype. If you want the specifics, see how often you should stand up.

the easy way to just sit less.

Supermoo nudges you once an hour to stand and move for sixty seconds. No fear, no dashboard, no account. Free, made by a nonprofit.

This article is general information, not medical advice. The studies referenced are summarized in plain language; for the underlying research, see our science page. If you have a health condition, talk to a qualified professional.