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 .
Rest break interventions in stoop labor tasks.
H and cultivation and harvest of agricultural products constitute strenuous physical tasks . Working with labor-management ergonomics committees in agricultural setting s , the UC Agricultural Ergonomics Research Center ( AERC ) tested an experimental rest and recovery protocol for its impact on symptoms and productivity during two types of work tasks . The experimental condition consisted of adding a 5 min rest break to every working hour in which there was no other scheduled break ( e.g. , lunchtime ) . This result ed in an additional 20 min of rest per workday . We tested the intervention in two trials : Trial one compared workers ( n=66 ) r and omly assigned to an experimental or a control group during the harvest of commercial strawberries . Trial two utilized a cross-over design ( n=16 pairs of workers ) to compare experimental and control conditions while workers inserted bud grafts into young 18 ' ' high citrus trees . For both trials , workers under the experimental condition reported significantly less severe symptoms than workers under control conditions . The order in which the intervention was given , however , appeared to result in variations in productivity . We conclude that the introduction of frequent , brief rest breaks may improve symptoms for workers engaged in strenuous work tasks
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 .