Design and ergonomics of chair

This unusual rocking chair is made of rough wood to give it an old-fashioned look. Chair design considers intended usage, ergonomics, as well as non-ergonomic functional requirements such as size, stack ability, fold ability, weight, durability, stain resistance and artistic design. Intended usage determines the desired seating position. "Task chairs", or any chair intended for people to work at a desk or table, including dining chairs, can only recline very slightly; otherwise the occupant is too far away from the desk or table. Dental chairs are essentially reclined. Easy chairs for watching television or movies are anywhere in between depending on the height of the screen.

Ergonomic designs distribute the weight of the inhabitant to various parts of the body. A seat that is higher results in hanging feet and increased pressure on the underside of the knees. It may also result in no weight on the feet which means more weight elsewhere. A lower seat may shift too much weight to the "seat bones".