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Bioelectrical impedance measuring method for standing load evaluation

A Seo1, M Kakehashi, S Uda

  • 1Department of Public Health, Hiroshima University School of Medicine, Japan.

Sangyo Eiseigaku Zasshi = Journal of Occupational Health
|March 1, 1995
PubMed
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Bioelectrical impedance analysis offers a sensitive method for assessing leg swelling due to prolonged standing. This low-frequency impedance technique is more effective than volume or circumference measurements for evaluating workload in standing jobs.

Area of Science:

  • Biomedical Engineering
  • Occupational Health

Background:

  • Prolonged standing in jobs can lead to lower leg swelling and discomfort.
  • Existing methods for evaluating leg swelling may lack sensitivity or practicality.

Purpose of the Study:

  • To evaluate a bioelectrical impedance method for assessing workload in standing jobs.
  • To investigate the relationship between different swelling evaluation methods and optimize impedance measurement conditions.

Main Methods:

  • Utilized bioelectrical impedance analysis to indirectly measure lower leg swelling.
  • Developed bioelectrical models to study impedance measurement conditions.
  • Conducted experiments on ten male subjects under various standing conditions.

Main Results:

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  • Theoretical analysis indicated low-frequency impedance changes are more sensitive to swelling than high-frequency.
  • Experimental results showed a significant impedance reduction (6.86 +/- 4.54%) in lower legs after 30 minutes of standing.
  • Measured impedance changes were 3-5 times greater than previously reported using other methods.

Conclusions:

  • The bioelectrical impedance method, particularly at low frequencies, is a sensitive and valid tool for evaluating standing workload.
  • This method provides a more accurate assessment of leg swelling compared to volume or circumference measurements.
  • The findings support the usefulness of impedance measurement as an index for standing job load.