This increases expense and time, making it unpractical to be used in a sport setting.īIA has poor accuracy in estimating body fatness or body water content, with studies reporting large errors in estimates of up to ~5%. Whilst measuring more compartments may provide more accurate estimates, they require multiple body composition techniques to be used to measure each of the compartments. This is even worse if the measurements are variable from day to day (poor reproducibility or reliability). This is hardly ever taken into account when interpreting the data and we are thus assuming and working with a pseudo accuracy. For a 50kg person, this range would be even greater: 13.0% and 17.0%. This means that a percentage body fat of 15% could really be anything between 9.5kg (20.9lbs) and 11.5kg (25.4lbs) for a 70kg (164lbs) athlete, and body fat would thus be between 13.6% and 16.4%: obviously a wide range. No techniques have an accuracy better than 1% (1) and this means that, at best, we can estimate body fat to within 700 grams in a 70kg person and in reality, it is usually closer to 1000 grams. Whilst there has been significant progress in the techniques used to estimate body composition, a gold standard method does not exist.
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