Biomechanical analysis of materials handling manipulators in short distance transfers of moderate mass objects: Joint strength, spine forces and muscular antagonism

Article Abstract:

Mechanized assistance is often put forward as a measure to relieve physical stress and risk of musculoskeletal injury linked to manual materials handling. A study looked at dynamic joint and muscle loads as a function of various task parameters and the use of a manipulator, to test if mechanical assistance would significantly decrease shoulder and trunk strength demands, reactive spine forces and be linked with differing magnitudes of muscular antagonism. Strength requirements fell significantly at the shoulders and low back with the use of the manipulator, and peak spine compression was reduced by around 40%. Hoist-assisted transfers may however impose higher demands on coordination and stability at extreme heights.

Health aspects, Safety and security measures, Measurement, Muscle strength, Spine

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Low-back stresses when learning to use a materials handling device

Article Abstract:

Materials handling devices have becoming increasingly adopted as ergonomists and work designers attempt to lower the stresses imposed on the human musculoskeletal system when manually handling loads. A study was therefore conducted to study learning effects resulting from the use of materials handling devices. Some initial empirical evidence obtained from the study suggest that slow motor learning may be present when naive subjects are asked to perform a simple sagittal plane lifting task.

Equipment and supplies, Materials handling equipment, Motor learning, Movement, Psychology of, Movement (Psychology)

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Measurement and prediction of single and multi-digit finger strength

Article Abstract:

The hand and finger strength is explained to have a direct application in the design of human-machine interfaces. Multiple regression models were used to determine if finger strength could be predicted from other strength measures and anthropometry.

United States, Evaluation, Design and construction, Human-machine systems, Anthropometry

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