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Related Experiment Videos

A new gas dilution method for measuring body volume

N Nagao1, K Tamaki, T Kuchiki

  • 1Department of Health Sports Science, Kawasaki University of Medical Welfare, Okayama, Japan.

British Journal of Sports Medicine
|June 1, 1995
PubMed
Summary

A new gas dilution method accurately measures human body volume, correlating highly with underwater weighing. This technique offers a promising alternative for individuals unable to submerge for body composition analysis.

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Area of Science:

  • Physiology
  • Anthropometry
  • Biomedical Engineering

Background:

  • Accurate body volume measurement is crucial for body composition analysis.
  • Traditional methods like underwater weighing have limitations, particularly for certain populations.
  • Developing novel, accessible methods for body volume assessment is an ongoing research area.

Purpose of the Study:

  • To validate a new gas dilution (GD) method for measuring human body volume.
  • To compare the accuracy of the gas dilution method against the established underwater weighing (UW) method.
  • To explore the relationship between gas dilution and underwater weighing results with body mass index (BMI).

Main Methods:

  • Plastic bottles and 16 human subjects (aged 18-42 years) were used for volume measurements.

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  • Body volume was determined using both the gas dilution (GD) method and the underwater weighing (UW) method.
  • Statistical correlation analyses were performed to compare the two methods and their relationship with BMI.

    • Main Results:

    • The gas dilution method showed a high correlation (r = 1.000) with hydrostatic weighing for plastic bottles.
    • A significant correlation (r = 0.998) was found between GD and UW methods for human subjects.
    • The gas dilution method yielded significantly larger body volume measurements compared to underwater weighing.
    • A significant correlation (r = 0.806) was observed between the difference in volumes (GD volume - UW volume) and BMI.

    Conclusions:

    • The new gas dilution method is a valid and highly correlated alternative to underwater weighing for body volume assessment.
    • The gas dilution method provides a promising approach for body composition research in populations unable to perform underwater weighing.
    • Body mass index can be used to predict underwater weighing volume from gas dilution measurements, suggesting potential for refining body composition estimations.