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    Psychophysical lifting capacity over extended periods

    Date
    1991-01
    Author
    Fernandez, Jeffrey E.
    Ayoub, M. M.
    Smith, James L.
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    Citation
    Ergonomics. 1991 Jan; 34(1): 23-32.
    Abstract
    The effect of time on an individual's lifting capacity over extended periods using a psychophysical approach was studied. Twelve male subjects estimated their lifting capacity in a 25 min period, and then attempted to lift this weight for an 8 h period under varying conditions. For one experimental condition the subjects were allowed to adjust the weight, the final adjusted maximum acceptable weight of lift (MAWOL) averaged 85.4% of the original MAWOL determined in the 25 min session. The subjects also attempted to lift for an 8 h period, without any weight adjustments. All 12 subjects lasted the 8 h at 2 lifts per min, but at a frequency of 8 lifts per min only three subjects completed the eight hour lifting task. This indicates that the psychophysical approach is a valid method to measure lifting capacity across the lower lifting frequency range but overestimates the lifting capacity at the higher frequency range. Slight fluctuations were noted in heart rate and oxygen consumption which were recorded every hour.
    Description
    The full text of this article is not available in SOAR. Check the journal record http://libcat.wichita.edu/vwebv/holdingsInfo?bibId=481823 for the paper version of the article in the library. You can also click on the DOI link below to access the article (may not be free).
    URI
    http://dx.doi.org/10.1080/00140139108967285
    http://hdl.handle.net/10057/4863
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