Ergonomics is ‘The science of the ‘fit’ between jobs and persons, the study of the relationship between an individual’s anatomy, physiology and psychology and the demands of particular forms of work’

Penguin Dictionary of Psychology (1985)

From an A/T perspective, ergonomics is the study of our posture and use in relationship to activities we perform in the world around us.  Ergonomics are also studied when furniture and equipment is designed in order to aid our general use and our psychophysical functioning.