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MAP20071019014Revised NIOSH equation for the design and evaluation of manual lifting tasks / Thomas R. Waters... [et al.]Sumario: This paper provides the basis for selecting the three criteria (biochemical, physiological, and psychophysical) that were used to define the 1991 equation, and describes the derivation of the individual components. The paper also describes the lifting index of relative physical stress, that can be used to identify hazardous lifting tasks. NIOSH believes that the revised 1991 lifting equation is more likely than the 1981 equation to protect most workersEn: Ergonomics. - London and Washington. - Vol. 36, nº 7, July 1993 ; p. 749-7761. National Institute for Occupational Safety and Health. 2. Ergonomía. 3. Ecuaciones. 4. Carga de materiales. 5. Biomecánica. 6. Fisiología. 7. Psicosociología de la prevención. 8. Valores TLV. 9. Prevención de accidentes. 10. Columna vertebral. I. Waters, Thomas R.. II. Title. III. Título: Ergonomics.