Relationship between Human Buoyancy Measures, Specific Gravity, and Estimated Body Fat in Adult Males

Abstract
Three measures of buoyancy under varying conditions of lung inflation were obtained by hydrostatic weighing. The relationship of these measures to specific gravity, estimated specific gravity, and body fat estimate were determined. Significant correlations were obtained between all buoyancy measures and specific gravity, and between these measures and body fat estimate. It was determined that even under conditions of maximum lung inflation some subjects were still “sinkers.”

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