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 .
The effectiveness of a construction worksite prevention program on work ability, health, and sick leave: results from a cluster randomized controlled trial.
OBJECTIVE This study aim ed to investigate the effectiveness of a prevention program on work ability , health , and sick leave targeted at construction worksites . METHODS A total of 15 departments ( N = 297 workers ) from 6 construction companies participated in this cluster r and omized controlled trial and were r and omly allocated to the intervention ( 8 departments ; N = 171 workers ) or control ( 7 departments ; N = 122 workers ) group . The intervention consisted of two individual training sessions with a physical therapist aim ed at lowering the physical workload , a rest-break tool to improve the balance between work and recovery , and two empowerment training sessions to increase the worker 's influence at the worksite . Data on work ability , physical and mental health status , and musculoskeletal symptoms were collected at baseline , and at 3 , 6 , and 12 months follow-up . Sick leave data were obtained from the companies . RESULTS Overall , no differences in work ability [ β 0.02 , 95 % confidence interval ( 95 % CI ) -0.34 - 0.37 ] or physical and mental health status ( β -0.04 , 95 % CI -1.43 - 1.35 , and β 0.80 95 % CI -0.51 - 2.11 , respectively ) were found between the intervention and control group . The intervention showed an overall decline in musculoskeletal symptoms ( ranging from OR 0.68 , 95 % CI 0.34 - 1.33 , to OR 0.86 , 95 % CI 0.47 - 1.57 ) and long-term sick leave ( OR 0.44 , 95 % CI 0.13 - 1.26 ) among construction workers . Both reductions were not statistically significant . CONCLUSION The prevention program seemed to result in a beneficial but not statistically significant decline in the prevalence of musculoskeletal symptoms and long-term sick leave among construction workers , but showed no effects with regard to work ability , physical health , and mental health
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 .