The work must be designed according to the physical and cognitive abilities of the employees, not the other way around.
This principle aims in particular to reduce hardship, fatigue, and musculoskeletal disorders.
Concrete example
In a logistics center, the heaviest packages are systematically placed on the lower levels of the shelves.
After an ergonomic study, the organization is revised so that the most handled loads are stored between knee and shoulder height.
Physical constraints are thus greatly reduced.