Results Level of evidence from 54 high and medium quality studies showed moderate evidence of a positive effect of physical exercise .
Within this domain , there was strong evidence of a positive effect of workplace strength training .
There was limited evidence for ergonomics and strong evidence for no benefit of participatory ergonomics , multifaceted interventions , and stress management .
No intervention domains were associated with “ negative effects ” .
Conclusions The evidence synthesis recommends that implementing strength training at the workplace can reduce MSD  among workers with physically dem and ing work .
In regard to workplace ergonomics , there was not enough evidence from the scientific literature to guide current practice s. Based on the scientific literature , participatory ergonomics and multifaceted workplace interventions seem to have no beneficial effect on reducing MSD among this group of workers .
Purpose This systematic review investigates the effectiveness of workplace interventions to rehabilitate musculoskeletal disorders ( MSDs ) among employees with physically dem and ing work .
A new bricklayers' method for use in the construction industry.
OBJECTIVES The aim of this study was to investigate the effect of raised bricklaying on physical workload , reported musculoskeletal disorders , sickness absence , and job satisfaction . METHODS A controlled intervention study with a follow-up period of 10 months was performed among 202 bricklayers from 25 construction companies . RESULTS The introduction of devices for raised bricklaying decreased the physical load on the lower back and , to a less extent , on the shoulders and upper extremities . Although raised bricklaying had no effect on the number of lifts , decreases in trunk bending lowered the biomechanical moment . The results showed no decrease in reported musculoskeletal symptoms as a result of the adoption of raised bricklaying . Irrespective of the reason(s ) , the percentage of bricklayers in the intervention group reporting sickness absence was significantly lower than the same percentage in the control group . The results also showed that , in general , the bricklayers in this study were very satisfied with the use of devices for raised bricklaying . CONCLUSIONS Controlled intervention studies on ergonomic improvements are rare . This study shows that the introduction of an ergonomic improvement in the construction industry may reduce physical load and the incidence of sickness absence
Results Level of evidence from 54 high and medium quality studies showed moderate evidence of a positive effect of physical exercise .
Within this domain , there was strong evidence of a positive effect of workplace strength training .
There was limited evidence for ergonomics and strong evidence for no benefit of participatory ergonomics , multifaceted interventions , and stress management .
No intervention domains were associated with “ negative effects ” .
Conclusions The evidence synthesis recommends that implementing strength training at the workplace can reduce MSD  among workers with physically dem and ing work .
In regard to workplace ergonomics , there was not enough evidence from the scientific literature to guide current practice s. Based on the scientific literature , participatory ergonomics and multifaceted workplace interventions seem to have no beneficial effect on reducing MSD among this group of workers .
Purpose This systematic review investigates the effectiveness of workplace interventions to rehabilitate musculoskeletal disorders ( MSDs ) among employees with physically dem and ing work .