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Effect of Floor Slope on Submaximal Lifting Capacity



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  • Personal Author:
  • Description:
    In order to reduce injuries due to lifting a box from the floor, maximal acceptable weights of lift (MAWL) have been established for a level surface. However, an inclined surface condition may be encountered on a jobsite. The purpose of this investigation was to determine if facing up or down a sloped surface affects MAWL. After obtaining university-approved informed consent, 20 apparently healthy men (age = 22.4+/-1.4 yrs) and 20 women (age = 22.0+/-1.9 yrs) determined floor to knuckle height MAWL using the psychophysical approach. After a familiarization day, two data collection days were completed with the uphill and level (+20, +10 and 0?) or downhill and level (-20, -10 and 0?) lifting capacities determined. A cadence of four lifts/min was used after starting with an unknown load that participants adjusted after each lift. No differences (p>0.05) in level MAWL were found on the downhill day compared to the uphill day. While the men lifted significantly more than the women in every condition (p<0.001), no differences were found across the lifting conditions (p>0.05). The men averaged a MAWL of 24.7 kg across the five conditions (average standard deviation (SD) = 7.4 kg), the women averaged 14.8 kg (average SD = 3.1 kg). While these findings would suggest no changes in lifting guidelines for a sloped surface within 20? of level, other factors such as lifting technique and the stress placed on the low-back should be examined to assess risk of injury in these different conditions. [Description provided by NIOSH]
  • Subjects:
  • Keywords:
  • ISSN:
    0067-8856
  • Document Type:
    Text
  • Funding:
    Grant
  • Genre:
    Proceedings
  • Place as Subject:
  • CIO:
    National Institute for Occupational Safety and Health (NIOSH)
  • Topic:
    Workplace Safety & Health
  • Location:
    North America
  • Pages in Document:
    283-289
  • NIOSHTIC Number:
    nn:20025440
  • Citation:
    Biomedical sciences instrumentation: proceedings of the 41st Annual Rocky Mountain Bioengineering Symposium & 41st International ISA Biomedical Sciences Instrumentation Symposium, April 23-25, 2004, Fort Collins, Colorado. James SP, Valenta H, eds. 2004 Jul; :283-289
  • Editor(s):
    James SP; Valenta H
  • Federal Fiscal Year:
    2004
  • Performing Organization:
    Colorado State University, Fort, Collins, CO 80523-1582
  • Peer Reviewed:
    True
  • Start Date:
    20010930
  • Source Full Name:
    Biomedical sciences instrumentation: proceedings of the 41st Annual Rocky Mountain Bioengineering Symposium & 41st International ISA Biomedical Sciences Instrumentation Symposium, April 23-25, 2004, Fort Collins, Colorado
  • End Date:
    20040329
  • Collection(s):
  • Main Document Checksum:
    urn:sha-512:6d579498a974f5a213fd9c62b7efbdb6b67eed7a10f89c64e62eb7cfdfd46c401ce52bf4efdb30c04be7df78aa3c56fe92f11150eafefec56790e80565438ae9
  • Download URL:
  • File Type:
    Filetype[PDF - 1.37 MB ]
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