Academic journal article Research Quarterly for Exercise and Sport

Cross Validation of Field-Based Assessment of Body Composition for Individuals with Down Syndrome. (Special Populations)

Academic journal article Research Quarterly for Exercise and Sport

Cross Validation of Field-Based Assessment of Body Composition for Individuals with Down Syndrome. (Special Populations)

Article excerpt

The ability to accurately estimate body composition is important to practitioners. Bioelectrical Impedance Analysis (BIA), Skinfold Measurements (SM), and Anthropometric Girth Measurements (AGM) are commonly used as field based assessments. These assessments are based on predictive equations that assume fat distributions would be similar for different populations. However, it has been reported that individuals with Down Syndrome (DS) have different body proportions than reference groups used for the predictive equation development. Therefore, the purpose of this study was to cross-validate prediction equations from two different SMs, AGM and BIA for individuals with DS. Participants were 14 individuals with DS and 9 without DS. Skinfold was measured from seven sites (chest, tricep, midaxillary, abdomen, suprailiac, subscapular, and thigh). Two independent raters measured each site twice and used an average score. The body composition was estimated from two equations: Jackson and Pollock (1978) and Lohman (1981). AGM was estimated using Kelley and Rimmer (1981) equation, which measured circumference of the abdomen, forearm, and buttocks. BAT was measured using the Valhalla body composition analyzer. The criterion measure of body composition is estimated from air-displacement plethysmography using the Bod-Pod[R]. The dependent variables were percentage of body fat estimated from each measure and differences between the criterion measurement and the estimated values from the prediction equations. …

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