The invention provides an exercise device for strengthening muscles in the scapula-thoracic region. The device enables simulated weight-bearing action for the upper limb while maintaining good postural form. The device can also be used to provide feedback on good postural form. The exercise device comprises a spine contact member (26) to be positioned at the thoracic curve of a person (10), and two rigid planar members (28) which extend laterally from the spine contact member (26). The rigid planar members (28) are positioned over the scapulae of the person (10). The spine contact member (26) and associated rigid planar members (28) are held in position by straps (30) which pass over and under the shoulders of the person (10).