Work-related musculoskeletal injuries are often associated with overexertion of the body at work. The manual materials handling activity of lifting is a major source of work-related musculoskeletal disorders. Biomechanical evaluation offers useful information about the physical stress imposed on the worker's body joints; however, biomechanical analysis is usually tedious and complex. For evalua...

[Purpose] Biomechanical data for manual material handling are important for appropriate engineering design. The goal of this study was to investigate differences in trunk muscle activity in lifting and lowering tasks at various heights. [Subjects and Methods] Thirty healthy, young adult subjects performed 6 asymmetrical lifting and lowering tasks at various heights. Trunk muscle activity of the...

Introduction: In India, physical manual activities in asymmetrical postures overtax the human musculoskeletal system, which may exceed workers' limitations. Thus purpose of this study was to examine stresses experienced by subject, based on subjective and biomechanical loading estimates while lifting weights various heights, an asymmetric direction propose safe limit for lifting. Methods: A lab...

The paper reviewed the three main approaches for setting limits of load to be limited manually. In the analysis the strengths and the weaknesses were highlighted and a need for a new approach using spinal shrinkage and some anthropometric dimensions was advocated. The approach may probably lead to the development of a safe weight of lift that may be subject-specific. It is expected that such an...

Most of studies on Manual Material Handling (MMH) tasks for finding lifting capacity were done on general population; these were not done for underweight, normal weight and overweight workers. MMH task involves the use of the human body to lift, lower or carry loads. The purpose of this study is to evaluate the effect of psychophysical approach on MAWL for underweight, normal weight and overwei...

The lifting task is the major activity contributing to the risk of lower back injur}. The purpose of this study was to examine the mechanical stresses on the lower back during manual lifting and to analxze how people adapt to the stresses. This purpose was accomplished by approaching the mechanical stresses on the lower back from three different perspectives. The effects of manual lifting tasks...