Standing desk vs sitting

This is the page where a site that sells standing desks is supposed to tell you that sitting is killing you. We are not going to, because we went and read the research, and the research does not say that.

What follows is all of it — including the parts that favour standing, of which there are some. But the headline is worth having up front, in the words of the people who did the work: the health benefits are unproven.

What Cochrane actually found

The most serious attempt at this question is a Cochrane systematic review (Shrestha et al., CD010912). Cochrane reviews are the closest thing this field has to a referee: they pool the studies, grade the quality of the evidence, and are institutionally allergic to overstating things. This one covered 34 studies and 3,397 participants.

Here is its central conclusion, verbatim:

“there is low-quality evidence that the use of sit-stand desks reduce workplace sitting at short-term and medium-term follow-ups. However, there is no evidence on their effects on sitting over longer follow-up periods.”

Unpack that, because there are three separate findings inside it.

They do reduce sitting. Around 100 minutes less sitting per workday in the short term (95% confidence interval −116 to −84, across 10 studies). That is a real effect and a decent size — over an hour and a half of a working day.

The effect shrinks. At medium-term follow-up it is down to about 57 minutes a day. Roughly half. The novelty appears to wear off, which will surprise nobody who has owned a gym membership.

The evidence is low-quality, and past medium-term there is none at all.Not “weak but positive”. None. Nobody has followed people for long enough to know whether any of this persists. So when someone tells you what a standing desk does for you over years, they are not reading a study, because the study does not exist.

“Unproven” is their word, not ours

The distinction that matters most on this page: reducing sitting and improving health are two different claims, and the category routinely sells the first as though it settles the second.

Cochrane addressed that directly, and their plain-language summary is titled with the conclusion: the health effects of sit-stand desks are still unproven.

It is worth being precise about what “unproven” means, because it is not the same as “disproven”. It means the studies done so far are not good enough to establish an effect in either direction. There may be a benefit that better research would find. There may not. The honest position is that nobody knows yet, and that anyone claiming otherwise — in either direction — is going beyond the evidence.

The weight-loss claim, specifically

One claim does get a direct answer, and it is the bluntest sentence in the whole review. Cochrane, verbatim:

standing “hardly increases energy expenditure, so one should not expect a sit-stand desk to help in losing weight.”

No hedging, no “low-quality evidence suggests”. If you have seen a calories-burned-standing figure in a listing or an infographic, that is what the largest systematic review of the category thinks of the underlying idea.

The part that favours standing

Now the other side, because a page that only reported the deflating half would be doing the same thing as the marketing, just in the opposite direction.

Cochrane reported no harms.Across 34 studies, nothing came back saying these desks hurt people. So the sceptical case does not get to be “standing desks are bad” either. They are not. They are a thing whose benefits are unestablished and whose costs, other than money, appear to be roughly nil.

And they demonstrably do the mechanical thing they claim.A hundred minutes a day less sitting is not nothing, even on low-quality evidence. If your position is “I would like to sit less, and I do not need a randomised trial to justify wanting that” — the evidence supports that the desk helps you do it. It just cannot tell you what happens next.

The BJSM statement: 2 hours, then 4, graded B and C

The other document everyone cites is the 2015 expert statement in the British Journal of Sports Medicine, commissioned by Public Health England. It recommends accumulating 2 hours a day of standing and light activity during working hours, progressing toward 4 hours a day.

That is the number you have seen quoted. Here is the part that never gets quoted with it: the statement grades its own recommendations on an A–D scale, and those recommendations are graded B and C. Nothing in it reaches grade A.

The authors are telling you, in their own document, how much confidence to place in their own advice — and the answer is moderate at best. That is not a criticism of the statement. It is the statement being honest, and the honesty getting stripped off in transmission, which is the recurring theme of this whole subject.

Where 20-8-2 actually came from

This one is worth the detour, because it is the clearest example of how this field’s numbers get manufactured.

You have seen the 20-8-2 rule: 20 minutes sitting, 8 standing, 2 moving. It circulates constantly with a citation to the British Journal of Sports Medicine.

It is not in there.We searched the full text of the BJSM expert statement. It contains no “20-8-2” and no sit:stand ratio of any kind. The attribution is simply wrong, and it has been copied from site to site for a decade.

The actual source is a Cornell ergonomics web page by Professor Alan Hedge — who is, confusingly, one of the BJSM statement’s co-authors, which is presumably how the two got welded together. And Cornell is admirably clear about what it is offering. It calls 20-8-2 “a ball park goal for organizing work” and says outright that the numbers “aren’t hard and fast”.

So a hedged rule of thumb from a university web page has been laundered into a precise clinical prescription from a peer-reviewed journal, purely by being repeated. The rule itself is fine — sensible, even. But if you have been feeling bad about not hitting 20-8-2 exactly, stop: its own author does not think the numbers are exact.

What the evidence does support

Strip away the parts that do not hold up and something modest is left standing, and it is worth having:

Sit less. Break it up. Move.

That direction has low-to-moderate quality support across all of these sources. What has no support is any specificnumber — no study establishes an optimal ratio, and none compares ratios head to head. The precision is invented; the direction is not.

And note that the emphasis is on the third word. Cornell, again, verbatim:

“Simply standing is insufficient. Movement is important to get blood circulation through the muscles.”

Which quietly undermines the whole product category, if you follow it. A standing desk lets you stand. Standing still at a desk for four hours is a static posture with your knees locked, and the sources pointing you away from static sitting are not pointing you at static standing. The thing they are pointing at — getting up, walking about, changing position — is free, and available to people with ordinary desks.

So should you buy one?

Our honest answer: possibly, but not for any of the reasons on the box.

Do not buy one for your health. That claim is unproven and the largest review of the field says so. Do not buy one to lose weight; Cochrane addressed that specifically and the answer was no.

Buy one because it fits you sitting down. This is the argument we would actually make, and it has nothing to do with standing at all. The conventional fixed desk is about 29″. Our arithmetic on the ANSUR II anthropometric medians — popliteal height plus seated elbow rest height, which is ours and not a published desk figure, from a military population — puts the surface a median man needs at around 26.6″ and a median woman at around 24.4″. Both are well below 29″. And ANSI/HFES 100 requires a sit-only surface to adjust over at least 22–28.3″ — a range whose top is below the ordinary desk.

A desk that adjusts is the only one that can be put where you actually need it. That argument survives every caveat on this page, because it does not depend on a health claim — it is a tape measure. The standing half is then a free option you may or may not exercise.

And if you are not sure you will exercise it — which, given that the measured effect halves by medium-term follow-up, is a reasonable thing to doubt — find out cheaply first. A converter sits on the desk you already own for a fraction of the money and answers that question with your own behaviour, which is better evidence about you than any of the studies above.

We have not tested any of this and we are not clinicians — everything here is us reading the sources and reporting what they say. If you are making a decision about your body rather than about your furniture, that is a conversation for a doctor. Our methodology page sets out what we do and, more importantly, what we cannot tell you.