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Determination of The Highest Permissible Spinal Shrinkage

2 Abstract: The main aim of this study was to establish the highest permissible spinal shrinkage when under any working conditions. The spinal lengths of human subjects were measured in the morning while the strain at failure during compression was obtained from the literature. The study calculated the permissible spinal shrinkage to be 0.021m and thus suggested that this shrinkage should not be exceeded if back pain attributable to workloads is to be largely controlled.