The ergonomics approach views sitting as a specific, specialized activity influenced by how a sitting person interacts with the working environment.
Several fundamental concepts must be considered:
One chair does not fit all. So, when choosing a chair, the user's body dimensions must be considered so that the chair does not toil one part of the body while fitting another.
No chair is appropriate for every activity. Dentists, for example, require a different chair than industrial workers or computer operators.
Consider the costs of upkeep and repairs. Check with the manufacturer to see what items to inspect for and how frequently inspections are necessary.