MEDLINE Journals

    Determination and evaluation of acceptable force limits in single-digit tasks.

    Authors
    Nussbaum MA, Johnson H 
    Source
    Hum Factors 2002; 44(4) :545-56.
    Abstract

    Acceptable limits derived from psychophysical methodologies have been proposed, measured, and employed in a range of applications. There is little existing work, however, on such limits for single-digit exertions and relatively limited evidence on several fundamental issues related to data collection and processing of a sequence of self-regulated exertion levels. An experimental study was conducted using 14 male and 10 female participants (age range 18-31 years) from whom maximal voluntary exertions and maximal acceptable limits (MALs) were obtained using the index finger and thumb. Moderate to high levels of consistency were found for both measures between sessions separated by one day. Single MAL values, determined from a time series of exertions, were equivalent across three divergent processing methods and between values obtained from 5- and 25-min samples. A critical interpretation of these and earlier results supports continued use of acceptable limits but also suggests that they should be used with some caution and not equated with safe limits. This research can be applied toward future development of exertion limits based on perceived acceptability.

    Mesh
    Adolescent
    Adult
    Female
    Fingers
    Hand Strength
    Humans
    Isometric Contraction
    Male
    Physical Exertion
    Psychomotor Performance
    Reference Values
    Thumb
    Weight-Bearing
    Workplace
    Language

    eng

    Pub Type(s)
    Journal Article Research Support, Non-U.S. Gov't
    PubMed ID

    12691364

    Content Manager
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