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| jog, iron tek, improving, health & fitness supplies, stretches, stone, metrx, lower, polar, burn, | The study involved a total of 172 children (83 male, 89 female) aged between five and 14 years jackson pollack of age. The ethnic composition of the sample was 55 European (26 male), 59 Maori (29 male) and 58 Pacific Island (28 male). “The study confirms that in girls aged between 5 and 14 years, those of Maori and Pacific Island descent have a lower percentage of body fat than their European counterparts for the same BMI. We jackson pollack were not able to demonstrate a similar effect in boys. Our study jackson pollack suggests that these BMI thresholds need to be raised by three to four units for Maori and Pacific Island girls in this age range for valid comparison with New Zealand European children.” BMI is not an appropriate measure of fat levels in a multiethnic population of European, Maori and Pacific Island girls but further study is required to establish for boys whether the relationship between BMI and body fatness is independent of ethnicity, says Kasalanaita Puniani. |
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| “These cut-off thresholds are based primarily on European data, but it is known from previous research that Maori and Pacific adults of the same body size as Europeans have higher fat-free mass (FFM) and lower fat mass, which makes the use of BMI to compare fatness among ethnic groups a doubtful classification.” In children, health & fitness supplies the situation is more complicated as BMI is highly age-dependent and obesity is more difficult to define in the growing bodies of young people, she says. “For measurement or indexing of body fat, bioimpedance analysis (BIA) has clear advantages over BMI because it health & fitness supplies differentiates between health & fitness supplies fat and lean tissue whereas BMI does not. “The bioelectrical impedance technique is a non-invasive, easily applied methodology for the measurement of body composition which has been accepted for field use by the international scientific community.” The portability and ease of use of BIA instruments makes the technique very suitable for field use with the advantage of being less operator-dependent than approaches based on, for example skinfolds, which are often used for fatness measurements, says Associate Professor Rush. |
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