Progressive Isoinertial Lifting Evaluation: I. A Standardized Protocol and Normative Database

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Dynamic tests of trunk strength and lifting capacity have become more popular in recent years, offering certain advantages over static isometric tests in measuring patient progress in functional restoration programs for spinal disorders. However, equipment for performing such tests is expensive to buy, complex to run, and requires technical expertise and clinical volume unavailable in most physician offices. In this study, a new dynamic test known as Progressive Isoinertial Lifting Evaluation (PILE) is described, which draws upon prior psychophysical and isoinertial methods. An industrial sample of 61 male and 31 female incumbent workers were tested using the PILE, and a variety of anthropometric normalizing factors were evaluated. The isolation of an “Adjusted Weight” (AW) normalizing factor is documented, after which normative data are presented for male and female workers utilizing lumbar (0–30 inches) and cervical (30–54 inches) dynamic protocols.

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