Relationship of Optical Density and Skinfold Measurements: Effects of Age and Level of Body Fatness

We examined relationships between skinfold (SKF) and optical density (ΔOD) measurements across age and levels of body fatness (%BF) for 151 women, 20 to 72 years. There were significant (p < .05) relationships between ΔODs and SKFs at all sites, except the thigh. The interaction (SKF × Age) was s...

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Bibliographic Details
Published in:Research quarterly for exercise and sport 1992-12, Vol.63 (4), p.402-409
Main Authors: Quatrochi, Joseph A., Hicks, Virginia L., Heyward, Vivian H., Colville, Bette C., Cook, Kelly L, Jenkins, Kathy A., Wilson, Wendy L
Format: Article
Language:English
Subjects:
Adipose Tissue - anatomy & histology
Adult
Aged
Aging - pathology
Anatomy & physiology
Anthropology. Demography
Biological and medical sciences
Body Composition
Body Height
Body Mass Index
Body Weight
Factor Analysis, Statistical
Female
Females
Human physiology applied to population studies and life conditions. Human ecophysiology
Humans
Infrared Rays
Medical research
Medical sciences
Middle Aged
Muscles - anatomy & histology
near-infrared interactance
Oils & fats
Optics and Photonics
Regression Analysis
Reproducibility of Results
Skinfold Thickness
Women
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Summary:We examined relationships between skinfold (SKF) and optical density (ΔOD) measurements across age and levels of body fatness (%BF) for 151 women, 20 to 72 years. There were significant (p < .05) relationships between ΔODs and SKFs at all sites, except the thigh. The interaction (SKF × Age) was significant (p < .05) for pectoral and biceps ΔODs. Slope comparisons indicated the relationships for younger (29 years) and older (59 years) women differed significantly from zero and each other (p < .05). Analysis of SKF × %BF interactions revealed that relationships between SKFs and ΔODs at the pectoral and biceps sites for leaner (22% BF) women differed significantly from zero (p < .05) and were larger than those for obese (39% BF) women (p ≤ .05). Thus, the relationship between SKFs and ΔODs is stronger for younger and leaner women compared to older and fatter women. These findings may reflect differences in fat layering due to age or body fatness and provide insight as to why the manufacturer's near-infrared (NIR) equation significantly underestimates the %BF of obese women.
ISSN:0270-1367
2168-3824
DOI:10.1080/02701367.1992.10608762