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Body composition by photon absorptiometry.

V Galea1, S Ormerod, N White

  • 1Department of Medicine, McMaster University, Hamilton, Ontario.

Canadian Journal of Sport Sciences = Journal Canadien Des Sciences Du Sport
|June 1, 1990
PubMed
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Dual photon absorptiometry accurately measures body composition, including lean body mass and fat mass. This safe and reliable method is effective across diverse populations, including athletes and those with eating disorders.

Area of Science:

  • Human Physiology
  • Medical Imaging
  • Body Composition Analysis

Background:

  • Accurate body composition assessment is crucial for understanding health and disease.
  • Dual photon absorptiometry (DPA) is a non-invasive technique for measuring bone mineral content and soft tissue composition.

Purpose of the Study:

  • To evaluate the accuracy and reliability of whole-body dual photon measurements for body composition.
  • To compare body composition between healthy controls, athletes, and patients with eating disorders.

Main Methods:

  • Whole-body dual photon measurements were conducted on 9 controls, 15 athletes, and 5 patients with eating disorders.
  • Lean body mass, mineral mass, and fat mass were quantified.
  • Reliability was assessed for lean body mass, fat mass, and total body bone mineral mass.

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Main Results:

  • Dual photon absorptiometry demonstrated accurate measurements of lean body mass, mineral mass, and fat mass.
  • Reliability was approximately 0.8 kg for lean and fat mass, and 60 g for bone mineral mass.
  • Women exhibited lower lean mass and higher fat mass than men; women with eating disorders showed male-like body composition.

Conclusions:

  • Whole-body dual photon absorptiometry is a safe and reliable method for assessing body composition.
  • The technique provides accurate and reproducible measurements across different physiological states and clinical groups.