Moderate evidence was observed for : ( 1 ) no effect of workstation adjustment , ( 2 ) no effect of rest breaks and exercise and ( 3 ) positive effect of alternative pointing devices .
For all other interventions mixed or insufficient evidence of effect was observed .
Conclusion : Few high quality studies were found that examined the effects of interventions in the office on musculoskeletal or visual health
Background : The literature examining the effects of workstation , eyewear and behavioral interventions on  musculoskeletal and visual symptoms among computer users is large and heterogeneous .
Methods : A systematic review of the literature used a best evidence synthesis approach to address the general question “ Do office interventions among computer users have an effect on musculoskeletal or visual health ? ”
The effect of forearm support on musculoskeletal discomfort during call centre work.
Using a computer keyboard with the forearms unsupported has been proposed as a causal factor for  neck/shoulder and arm/h and diagnoses . Recent laboratory and field studies have demonstrated that forearm support might be preferable to working in the traditional " floating " posture . The aim of this study was to determine whether providing forearm support when using a normal computer workstation would decrease musculoskeletal discomfort in intensive computer users in a call centre . A r and omised controlled study ( n = 59 ) , of 6 weeks duration was conducted . Thirty participants ( Group 1 ) were allocated to forearm support using the desk surface with the remainder ( Group 2 ) acting as a control group . At 6 weeks , the control group was also set up with forearm support . Both groups were then monitored for another 6 weeks . Question naires were used at 1 , 6 and 12 weeks to obtain information about discomfort , workstation setup , working posture and comfort .  Nine participants ( Group 1 n = 6 , Group 2 n = 3 ) withdrew within a week of commencing forearm support either due to discomfort or difficulty in maintaining the posture . At 6 weeks , the group using forearm support generated significantly fewer reports of discomfort in the neck and back , although the difference between the groups was not statistically significant . At 12 weeks , there were fewer reports of neck , back and wrist discomfort when preintervention discomfort was compared with post intervention discomfort . These findings indicate that for the majority of users , forearm support may be preferable to the " floating " posture implicit in current guidelines for computer workstation setup
Moderate evidence was observed for : ( 1 ) no effect of workstation adjustment , ( 2 ) no effect of rest breaks and exercise and ( 3 ) positive effect of alternative pointing devices .
For all other interventions mixed or insufficient evidence of effect was observed .
Conclusion : Few high quality studies were found that examined the effects of interventions in the office on musculoskeletal or visual health
Background : The literature examining the effects of workstation , eyewear and behavioral interventions on  musculoskeletal and visual symptoms among computer users is large and heterogeneous .
Methods : A systematic review of the literature used a best evidence synthesis approach to address the general question “ Do office interventions among computer users have an effect on musculoskeletal or visual health ? ”