The short answer: a treadmill desk reliably uses about 100 more calories per hour than sitting, and it can reduce how much you sit. The catch is how much people actually use one: in workplace studies the reduction in sitting was only about 2 minutes per hour on average. Walking while you work lowers typing speed, and we couldn't find evidence for several of the claimed extras, such as better focus and less back pain.
| Claim on the earlier page | What we found |
|---|---|
| A walking desk adds 6,000 to 8,000 steps over a 6 to 8 hour day | The arithmetic is higher if you really walk that long, but in workplace studies people sat only about 2 minutes less per hour |
| 300 to 500 extra calories a day; 15 to 20 kg a year | About 100 extra calories per hour of use; the annual figure has no support |
| Typing accuracy "barely suffers" at the right speed | Typing speed was lower on treadmill desks in a 2020 meta-analysis; errors were not significantly higher |
| Sitting harms you even if you exercise regularly | Partly: the extra risk was absent in people doing about 60 to 75 minutes a day of moderate activity |
| Fewer afternoon crashes, less back stiffness, better focus | No trial evidence found for these; psychological and cognitive effects were inconclusive in a review |
Is sitting the problem?
The earlier page said sitting is an independent health risk "even among people who exercise regularly." The evidence is more nuanced. A 2016 meta-analysis in The Lancet (Ekelund and colleagues) of 16 studies and over a million people found that more daily sitting was associated with higher all-cause mortality, but the extra risk was mitigated in physically active people. In the most active quartile, doing about 60 to 75 minutes a day of moderate activity, there was no increased risk even with more than 8 hours of sitting. A 2019 analysis of 149,077 adults (in the Journal of the American College of Cardiology) found that sitting was associated with mortality mainly in the least active people, those doing under 150 minutes a week of moderate-to-vigorous activity, and that meeting the guideline attenuated or effectively eliminated the association. All of this is observational. So sitting time matters most if you aren't otherwise very active, and the most reliable fix in these studies is more movement overall. See how many steps you need for the step-count evidence.
What a treadmill desk does
In a 2007 study from the Mayo Clinic (Levine and Miller), 15 office workers with obesity used a walk-and-work desk at a self-selected pace and their energy use rose from about 72 to 191 calories an hour, an increase of 119. A 2021 systematic review and meta-analysis in BMC Public Health (Oye-Somefun and colleagues) pooled laboratory studies and found an increase of about 105 calories an hour (95% CI 90 to 120) compared with sitting. In workplace studies, treadmill-desk users sat 1.73 minutes less per hour (95% CI 0.17 to 3.3) than people at conventional desks, and the review found no statistically significant changes in other metabolic outcomes.
So the calorie effect depends on hours of use. At about 100 extra calories an hour, two hours of walking adds around 200 calories and six hours around 600 (our arithmetic), but real-world use is far lower than a full day. At 1.5 mph, the slow speed typically used at desks, you take roughly 3,000 to 4,500 steps per hour (our estimate; step length shortens at slow speeds), so the earlier page's "6,000 to 8,000 steps for six to eight hours" was low for a full day and unrealistically high for typical use. We removed the "15 to 20 kg a year" figure, which has no basis; weight loss from added walking is usually much smaller than the arithmetic suggests (how many steps to lose weight).
Speed and work performance
A 2020 meta-analysis in Work (Podrekar and colleagues) of 18 studies found that cycle and treadmill desks reduced typing speed (for treadmill desks, a standardised mean difference of -0.8, a large effect), although typing errors did not rise significantly on treadmill desks and there was no effect on selective attention tests. Studies of treadmill desks generally use slow speeds of roughly 1 to 2 mph, and the earlier page's table of speeds for specific tasks wasn't from research, so we've removed it. Test it on your own work: if your typing or mouse accuracy suffers, slow down or sit for those tasks. A review of standing and treadmill desks (published around 2015) concluded that effects on psychological outcomes and cognitive function were inconclusive.
The other claimed benefits
The earlier page said walking desks reduce afternoon crashes, ease back and neck stiffness, and improve focus. We couldn't find trials for those specific effects. What research does show is related: frequent short walking breaks lowered post-meal blood sugar in overweight adults (see walking and blood sugar), the American Diabetes Association recommends interrupting prolonged sitting with light activity every 30 minutes for people with type 2 diabetes, and a small crossover study found that 2-minute walking breaks every 30 minutes offset a decline in brain blood flow during four hours of sitting (see walking and creativity). Those back up breaking up sitting; they don't show that a treadmill desk beats breaks.
Costs and trying it out
This part is practical and opinion-based. Under-desk treadmills cost money, take up floor space and make some noise, and many people end up alternating between sitting, standing and walking. You can test the idea cheaply first: stand or walk during phone calls, take a 2- to 5-minute walking break every 30 minutes, or take a walk at lunch. If you buy a treadmill desk, start with an hour or two a day. Our guide to fitting in 10,000 steps has other ways to move around a desk job. If you want to see how much you move, an hourly activity chart helps. StepMax, our own free app, has one: Android, iPhone.
Sources
- Ekelund U, Steene-Johannessen J, Brown WJ, et al. Does physical activity attenuate, or even eliminate, the detrimental association of sitting time with mortality? A harmonised meta-analysis of data from more than 1 million men and women. The Lancet. 2016;388(10051):1302-1310. thelancet.com
- Sitting time, physical activity, and risk of mortality in adults. Journal of the American College of Cardiology. 2019. jacc.org
- Levine JA, Miller JM. The energy expenditure of using a "walk-and-work" desk for office workers with obesity. British Journal of Sports Medicine. 2007;41(9):558-561. academia.edu (via a review)
- Oye-Somefun A, et al. A systematic review and meta-analysis of the effect of treadmill desks on energy expenditure, sitting time and cardiometabolic health in adults. BMC Public Health. 2021. PubMed
- Podrekar N, Kozinc Z, Sarabon N. The effects of cycle and treadmill desks on work performance and cognitive function in sedentary workers: a review and meta-analysis. Work. 2020. PubMed
- A systematic review of standing and treadmill desks in the workplace. academia.edu
- Carter SE, Draijer R, Holder SM, Brown L, Thijssen DHJ, Hopkins ND. Regular walking breaks prevent the decline in cerebral blood flow associated with prolonged sitting. Journal of Applied Physiology. 2018;125(3). physiology.org
Correction note: an earlier version of this page said sitting is a health risk even among regular exercisers, that a walking desk adds 6,000 to 8,000 steps and 300 to 500 calories a day and 15 to 20 kg a year, gave a table of walking speeds for different tasks, said typing accuracy barely suffers, and said walking desks reduce afternoon crashes and back stiffness and improve focus. We could not support most of those, so they were removed or corrected. We checked the figures against published abstracts and summaries on October 2, 2026; the Levine and Miller figures are as reported in a review and the JACC paper's authors are not listed. The step estimate is our own arithmetic. This article is for informational purposes and does not replace medical advice. This is general information, not medical advice.