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 .
Acute Effect of Topical Menthol on Chronic Pain in Slaughterhouse Workers with Carpal Tunnel Syndrome: Triple-Blind, Randomized Placebo-Controlled Trial
Topical menthol gels are classified “ topical analgesics ” and are cl aim ed to relieve minor aches and pains of the musculoskeletal system . In this study we investigate the acute effect of topical menthol on carpal tunnel syndrome ( CTS ) . We screened 645 slaughterhouse workers and recruited 10 participants with CTS and chronic pain of the arm/h and who were r and omly distributed into two groups to receive topical menthol ( Biofreeze ) or placebo ( gel with a menthol scent ) during the working day and 48 hours later the other treatment ( crossover design ) . Participants rated arm/h and pain intensity during the last hour of work ( scale 0–10 ) immediately before 1 , 2 , and 3 hours after application . Furthermore , global rating of change ( GROC ) in arm/h and pain was assessed 3 hours after application . Compared with placebo , pain intensity and GROC improved more following application of topical menthol ( P = 0.026 and P = 0.044 , resp . ) . Pain intensity of the arm/h and decreased by −1.2 ( CI 95 % : −1.7 to −0.6 ) following topical menthol compared with placebo , corresponding to a moderate effect size of 0.63 . In conclusion , topical menthol acutely reduces pain intensity during the working day in slaughterhouse workers with CTS and should be considered as an effective nonsystemic alternative to regular analgesics in the workplace management of chronic and neuropathic pain
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 .