Environment - working conditions and MSDs on nurses The working environment of health workers in general and nurses in particular has many potential risk factors that greatly affect the prevalence and incidence of MSDs, including: - Physical risk factors / postures: care work, transportation of patients, heavy objects, wrong posture... - Extended working time: long working time, duty, shift work lasts more than 12 hours, night work, holiday work... 5 - Unreasonable organization and workload, lack of social support, jobs requiring high responsibility... - Toxic and noisy working environment... 1.3.