Companies spend billions each year kitting out offices with adjustable chairs, split keyboards and desks that rise and fall. A fresh look at the best available research suggests that for employees already suffering arm, neck or shoulder trouble, most of that equipment makes little measurable difference.
The updated Cochrane review, led by the University of Technology Sydney (UTS), appears in the Cochrane Database of Systematic Reviews (DOI: 10.1002/14651858.CD014644.pub2). Its authors pooled 20 studies covering 2,478 participants with work-related complaints of the arm, neck or shoulder — known by the shorthand CANS — and found no meaningful effect on pain, function, recovery, quality of life or sick leave when ergonomic changes
Those conditions are far from rare. An estimated 30 to 40 percent of the working population lives with work-related arm, neck or shoulder problems.
What the studies actually tested
Thirteen of the 20 trials looked at office workers or computer users; the remaining seven examined staff in factories, sewing rooms and slaughterhouses. The interventions were the familiar catalogue of workplace fixes — height-adjustable chairs, modified keyboards, posture training, sit-stand desks. For workers with CANS, they delivered little to no short-term benefit.
Across follow-up periods of up to three months, pain intensity barely shifted, reductions in sick leave were not consistent, and findings on the use of medical services were mixed.
Lead author Dr Poonam Mehta of UTS said the picture had hardly changed when the best available studies were brought together. The evidence behind such measures, she added, is considerably weaker than is often assumed in practice.
Money spent, movement overlooked
Mehta also pointed to the cost. Ergonomic interventions can place a substantial financial burden on organisations, she said. Small benefits may appear in specific subgroups — tendinitis of the rotator cuff, for instance, or where adjustments form part of a wider programme — but the supporting evidence remains limited.
Head to head, the equipment fared worse than exercise programmes or targeted posture-correction training. Combining posture exercises with ergonomic adjustments may ease pain in the short term, yet changing the furniture alone showed no consistent advantage over exercise.
One boundary matters: the review dealt mainly with treating symptoms that already exist, not with primary prevention. Ergonomic adjustments, the authors stress, still have their place in prevention — but on current evidence they are no substitute for therapeutic treatment once pain has set in.
The market, meanwhile, keeps growing. According to data from Mordor Intelligence, global sales of ergonomic office furniture stand at 16.5 billion US dollars and are projected to approach nearly 23 billion US dollars by 2031.
