You are mainly interested in Ergonomical risks.
You put a tag at Ergonomical risks
When you do no find an appropriate lesson or course, search in an associated category as Musculoskeletal disorders.
Or try the category More than 2 risks including comprehensive lessons and courses. Such materials may contain a chapter on ergonomical risks.
Under Other topics you may find ergonomic risk assessment tools in Domains, instruments and tools for OSH.