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MAP20071500079Comprehensive manual handling limits for lowering, pushing, pulling and carrying activities / Christin Shoaf... [et al.]The objective of this study was to develop a set of mathematical models for manual lowering, pushing, pulling and carrying activities that would result in establishing load capacity limits to protect the lower back against occupational low-back disorders. In order to establish safe guidelines, a three-stage process was used: first, psychophysical data; second, biomechanical analysis; third, physiological criteriaEn: Ergonomics. - London [etc.]. - Vol. 40, nº 11, November 1997 ; p. 1183-12001. Ergonomía. 2. Carga de materiales. 3. Operaciones de carga y descarga. 4. Modelos matemáticos. 5. Métodos de análisis. 6. Biomecánica. 7. Fisiología. 8. Psicofisiología. I. Shoaf, Christin. II. Title.