Published in the Cochrane Database of Systematic Reviews in 2018, Shrestha and colleagues reviewed 34 studies with 3,397 total participants from high-income countries. There was low-quality evidence that sit-stand desks reduce workplace sitting at short- and medium-term follow-ups by 84 to 116 minutes per day. Other interventions like walking breaks and treadmill desks had insufficient evidence.

The quality of evidence was rated low for most interventions, mainly because studies were poorly designed, had small sample sizes, and lacked long-term follow-up. The conclusion was explicit: there is uncertainty about how big an impact sit-stand desks can make, and the health effects remain unproven. Cochrane titled their press release: "Health effects of sit-stand desks and interventions aimed to reduce sitting work are still unproven."

Published in the European Journal of Preventive Cardiology in 2018, Saeidifard, Medina-Inojosa, Supervia, Olson, Somers, Erwin, and Lopez-Jimenez from the Mayo Clinic conducted a systematic review and meta-analysis of 46 studies containing 1,184 participants.

The average difference in energy expenditure between sitting and standing was 0.15 calories per minute. The difference among women was only 0.1 calories per minute and 0.19 calories per minute in men. By substituting sitting with standing for 6 hours per day, a 65 kg person would burn only 54 additional calories per day. This translates to approximately 2.5 kg (about 5.5 pounds) of body fat in one year - a clinically negligible amount for weight loss purposes and far less than what standing desk marketing often implies.

Published in the American Journal of Epidemiology in 2018, Smith, Ma, Glazier, Gilbert-Ouimet, and Mustard studied 7,320 employed workers (50% male) working 15 or more hours per week who were free of heart disease at baseline. Incident heart disease was assessed using administrative health records over approximately 12 years (2003-2015).

Occupations involving predominantly standing were associated with approximately 2 times the risk of heart disease compared to occupations involving predominantly sitting. This association was robust to adjustment for health, sociodemographic, and work variables. The risk for women in standing occupations was notably elevated. This large prospective study suggests that simply replacing sitting with standing may not reduce cardiovascular risk and could potentially increase it, likely because prolonged standing promotes blood pooling in the legs and increases the heart's workload.

Published in the journal Work in 2020, De Carvalho, Greene, Swab, and Godwin conducted a systematic review and meta-analysis examining whether standing desk work reduces low back pain compared to seated desk work. Results of three studies were pooled using a random-effects model.

Prolonged standing postures during desk work did not produce significantly less perceived low back pain compared to seated postures (standardized mean difference 0.60, which was not statistically significant). The authors concluded that replacing seated desk work postures with standing for prolonged periods would not be recommended for back pain relief. This directly challenges one of the most common marketing claims for standing desks - that they help with back pain.

Published in the British Journal of Sports Medicine in 2018, Coenen and colleagues screened 11,750 articles and included 50 articles reporting 49 studies with 88,158 participants examining occupational standing and musculoskeletal symptoms.

Substantial occupational standing (more than 4 hours per workday) was associated with low-back symptoms with a pooled odds ratio of 1.31, meaning 31% higher odds of having low back problems compared to those who stood less. The majority of included studies also reported statistically significant detrimental associations of occupational standing with lower extremity symptoms such as leg pain and foot problems. There was no association with upper extremity symptoms. This large meta-analysis suggests standing desks could paradoxically worsen back and leg pain rather than alleviate it, especially when standing duration exceeds 4 hours.

Published in the International Journal of Epidemiology in 2024, Ahmadi, Coenen, Straker, and Stamatakis analyzed device-measured stationary behavior from 83,013 UK adults who were free of heart disease at baseline, using research-grade wrist-worn wearables over 7 to 8 years of follow-up.

Sitting for over 10 hours per day increased both cardiovascular disease and orthostatic incidence risk. However, standing more did NOT improve cardiovascular health outcomes including coronary heart disease, stroke, and heart failure. Standing was associated with higher orthostatic circulatory disease risk, including varicose veins and chronic venous insufficiency (conditions caused by blood pooling in the legs). The researchers concluded that movement-based interventions, rather than simply standing more, are needed to reduce cardiovascular risk.

Published in the Journal of Science and Medicine in Sport in 2015, Bailey and Locke conducted a randomized three-period, three-treatment acute crossover trial with 10 non-obese adults in three conditions: uninterrupted sitting, seated with 2-minute standing bouts every 20 minutes, and seated with 2-minute light-intensity walking bouts every 20 minutes.

Blood sugar response was significantly lower only in the walking condition: 18.5 mmol/L per 5 hours compared to 22.0 for sitting and 22.2 for standing breaks. There was NO difference between uninterrupted sitting and standing-break conditions. This directly challenges the claim that standing desks improve blood sugar control, showing that actual walking movement - not just being upright - is what produces the metabolic benefit.

Published in the Journal of Science and Medicine in Sport in 2019, Altenburg, Rotteveel, Serne, and Chinapaw conducted an experimental crossover study with 20 healthy-weight males (average age 19.2 years) who participated randomly in three 5-hour conditions: sitting on an office chair, sitting on a stability ball, and sitting with hourly 10-minute standing interruptions.

The study found that hourly standing interruptions during 5 hours of prolonged sitting do not significantly affect postprandial cardiometabolic biomarkers (blood sugar, insulin, triglycerides, blood pressure) in healthy young men. The researchers titled their paper "Standing is not enough," highlighting that merely being upright without actual physical movement does not produce the metabolic benefits commonly attributed to standing desks.

Published in Obesity in 2019, Josaphat and colleagues conducted a systematic review to summarize the impact of active workstations on health and work outcomes in participants with overweight or obesity.

While a decrease in sedentary time and increase in physical activity and energy expenditure were observed for most active workstations, the treadmill desk was the only workstation for which improved work performance and help with body-weight management (body fat percentage, body weight, waist and hip circumference) were reported. Standing desks alone did not produce measurable body composition changes. This suggests the health benefits often attributed to standing desks may actually require real movement, not merely being upright, and that marketing claims about weight loss from standing desks are not supported by evidence.