A pilot study of the biomechanics of lifting in simulated industrial work situations.
J Saf Res 1971 Sep; 3(3):98-115
A description of new apparatus and methodologies developed for the objective measurement of lifting stress in specific and realistically simulated work situations. Weight alone is meaningless as an indicator of the severity of a lifting task; torque is the true index of task severity. Torques acting on the lumbar spine and hip joint can be evaluated using surface myograms which will provide an objective "biomechanical profile" of a lifting task. Applications of lifting stress measurement under conditions of static lifting, dynamic lifting, and walking with a load are shown. Finally, it is demonstrated that heel height - through change of the curvature of the spine - may vary substantially the severity of a lifting task, even if the load does not change, and that this is more significant in women than in men. The anatomical structures involved in the lifting process are listed. They are described in biomechanical lifting equivalents which consider the bulk/weight ratio of an object handled.
NIOSH-Publication; NIOSH-Grant; Methodology; Surface-myograms; Biomechanical-profiles; Measurement; Simulation; Working-environment; Workload
Rehabilitation Medicine New York University Med Ctr 400 East 34 Street New York, N Y 10016
Journal of Safety Research
New York University, New York, New York