Title page for ETD etd-06112009-063305
|Type of Document
||Lowe, Brian D.
||Modelling the additivity of perceived exertion in symmetric, mid-sagittal lifting
||Master of Science
||Industrial and Systems Engineering
|Kroemer, Karl H. E.
|Prestrude, Albert M.
|Woldstad, Jeffery C.
|Date of Defense
Two hypotheses were formulated to examine the additivity of perceived exertion
in repetitive, symmetric, mid-sagittal lifting. "Additivity" has been defined as the
means by which a whole-body rating of perceived exertion is composed of a weighted
combination of component ratings of perceived exertion. The "task additivity"
hypothesis asserts that a perceived exertion rating for the whole body in a floor-tooverhead
lifting task can be modelled by the perceived exertion ratings of the
component motions, i.e., floor-to-knuckle height lifting and knuckle height-to-overhead
lifting. This is an inter-task (subtask) additivity paradigm. The "body-segment
additivity" hypothesis asserts that the perceived exertion rating for the whole body in a
floor-to-overhead lifting task can be modelled by a combination of the ratings of
perceived effort from the arms, legs, torso, and central (cardio-respiratory) body
functions. This is an intra-task (regional) additivity paradigm.
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