There was low- to very low- quality evidence that other interventions were not effective in reducing work-related upper limb and neck MSDs in adults .
We found moderate- quality evidence to suggest that the use of arm support with alternative mouse may reduce the incidence of neck/shoulder MSDs , but not right upper limb MSDs .
Moreover , we found moderate- quality evidence to suggest that the incidence of neck/shoulder and right upper limb MSDs is not reduced when comparing alternative and conventional mouse with and without arm support .
However , given there were multiple comparisons made involving a number of interventions and outcomes , high- quality evidence is needed to determine the effectiveness of these interventions clearly .
While we found very-low- to low- quality evidence to suggest that other ergonomic interventions do not prevent work-related MSDs of the upper limb and neck , this was limited by the paucity and heterogeneity of available studies .
BACKGROUND Work-related upper limb and neck musculoskeletal disorders ( MSDs ) are one of the most common occupational disorders around the world .
Although ergonomic design and training are likely to reduce the risk of workers developing work-related upper limb and neck MSDs , the evidence is unclear .
OBJECTIVES To assess the effects of workplace ergonomic design or training interventions , or both , for the prevention of work-related upper limb and neck MSDs in adults .
A randomised controlled trial of postural interventions for prevention of musculoskeletal symptoms among computer users
Aims : To examine the effect of two workstation and postural interventions on the incidence of  musculoskeletal symptoms among computer users . Methods : R and omised controlled trial of two distinct workstation and postural interventions ( an alternate intervention and a conventional intervention ) among 376 persons using computer keyboards for more than 15 hours per week . The incidence of neck/shoulder symptoms and h and /arm symptoms during six months of follow up among individuals in the intervention groups was compared to the incidence in computer users who did not receive an intervention ( comparison group ) . For individuals in the intervention groups , study staff adjusted workstations , where possible , and trained individuals to assume the intervention postures . Individuals reported musculoskeletal symptoms in a weekly diary . Participants who reported discomfort intensity of 6 or greater on a 0–10 visual analogue scale or who reported musculoskeletal symptoms requiring use of analgesic medication were considered symptomatic . Results : There were no significant differences in the incidence of musculoskeletal symptoms among the three intervention groups . Twenty two ( 18.5 % ) participants in the alternate intervention group , 25 ( 20.2 % ) in the conventional intervention group , and 25 ( 21.7 % ) in the comparison group developed incident arm or h and symptoms . Thirty eight ( 33.3 % ) participants in the alternate intervention group , 36 ( 31.0 % ) in the conventional intervention group , and 33 ( 30.3 % ) in the comparison group developed incident neck or shoulder symptoms . Compliance with all components of the intervention was attained for only 25–38 % of individuals , due mainly to the inflexibility of workstation configurations . Conclusions : This study provides evidence that two specific workplace postural interventions are unlikely to reduce the risk of upper extremity musculoskeletal symptoms among computer users
There was low- to very low- quality evidence that other interventions were not effective in reducing work-related upper limb and neck MSDs in adults .
We found moderate- quality evidence to suggest that the use of arm support with alternative mouse may reduce the incidence of neck/shoulder MSDs , but not right upper limb MSDs .
Moreover , we found moderate- quality evidence to suggest that the incidence of neck/shoulder and right upper limb MSDs is not reduced when comparing alternative and conventional mouse with and without arm support .
However , given there were multiple comparisons made involving a number of interventions and outcomes , high- quality evidence is needed to determine the effectiveness of these interventions clearly .
While we found very-low- to low- quality evidence to suggest that other ergonomic interventions do not prevent work-related MSDs of the upper limb and neck , this was limited by the paucity and heterogeneity of available studies .
BACKGROUND Work-related upper limb and neck musculoskeletal disorders ( MSDs ) are one of the most common occupational disorders around the world .
Although ergonomic design and training are likely to reduce the risk of workers developing work-related upper limb and neck MSDs , the evidence is unclear .
OBJECTIVES To assess the effects of workplace ergonomic design or training interventions , or both , for the prevention of work-related upper limb and neck MSDs in adults .