S M Waly

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Spinal compression tolerance limits (SCTL) have been widely used by ergonomists in setting work tolerance limits for manual materials handling (MMH) operations. Thus, the effect of personal and experimental factors on spinal compression tolerance limits (SCTL) is reviewed with the aid of regression and correlation analyses performed on data compiled from(More)
The major objective of this investigation was to study the effectiveness of the physical conditioning program used at the University of Miami Comprehensive Pain and Rehabilitation Center in restoring certain elements of the functional abilities of individuals suffering from chronic low-back pain and to evaluate the effectiveness of using a systematically(More)
This study was undertaken to investigate the use of electromyography (EMG) biofeedback as an add-on therapy to standard exercise in the restoration of the functional abilities of the trunk extensor muscles in patients suffering from chronic low-back pain (CLBP). A controlled experimental investigation was conducted to study the effectiveness of using the(More)
The main objective of this study was to test the differences among four techniques for the determination of lifting abilities. This study introduced a new submaximal isometric strength testing technique. The proposed test was based on the concept of acceptable maximum effort (AME) which is the level of static exertion the individual is willing to perform(More)
This study was undertaken to evaluate the physiological stresses experienced by news media cameramen on their jobs. The tasks performed by the cameramen were simulated, based on the results of monitoring the field performance of these camera operators for a two-week period. Four male professional camera operators volunteered to participate in this study.(More)
In the present study a modified shovel design with two perpendicular shafts is presented. This modified, two-shaft shovel was compared with a regular shovel. The modified shovel was evaluated and tested in a controlled laboratory environment using surface electromyography recorded from the lumbar paraspinal muscles. The new shovel design was also tested in(More)
This paper provides two models for males and females to assess the psychophysical maximum acceptable weight of lift. The weight guidelines generated by the models are a function of lifting frequency, height of lift, sagittal or asymmetrical lifting, task duration, container size in the sagittal plane, presence or absence of container couplings, and(More)
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