No matter what the task, an ergonomic chair or ergonomic office chair will pay for itself fast due to less pain and increased productivity. The terms computer ergonomics and office ergonomics are often used to mean the same thing; they are usually referring to body-adapted ergonomic chairs, office chairs, stools, desks, keyboards, mice, etc. Try out several chairs at furniture, office supply and back-care stores before you pick the best ergonomic chair for you. There are some extra large ergonomic chairs that are great for security guards as the size of this chair allows for equipment to be worn on the belt and not to become hooked on the arms of the chair.