The Alexander Technique (AT), named after Frederick Matthias Alexander, is an educational process that develops the ability to realign posture and to avoid unnecessary muscular and mental tension. Alexander believed the individual's self-awareness could be inaccurate, resulting in unnecessary muscular tension such as when standing or sitting with body weight unevenly distributed, holding one's head incorrectly, walking or running inefficiently, and responding to stressful stimuli in an exaggerated way. Alexander said that those who habitually "misused" their muscles could not trust their feelings (sensory appreciation) when carrying out activities or responding to situations emotionally.