Graphical illustration of 9 work postures typically associated with lifting a compact load at each of 3 vertical and 3 horizontal distances in front of the body. The postural requirements of a lift, in addition to the weight of the object lifted, influence the risk of an overexertion musculoskeletal injury. Accordingly, recommended weight limits are reduced as work posture deviates from the ideal (ie, the close abdominal lift) to compensate for risk because of postural loading. The term “mid” refers to the “middle” horizontal lifting distance (between the close and far).
MacDonald. Clinical guidelines for occupational lifting. Am J Obstet Gynecol 2013.