Comparison of the relative body fat result using the jackson & pollock equations between three and seven skinfolds in women attending the gym
Abstract
The goal of the present study was to compare the results obtained through the three skinfolds (3SF) and seven skinfolds (7SF) equation to estimate of relative body fat when combined with Siri equation in women in academy of gymnastics. The study included a sample of 32 healthy adults women (20 until 36 years old), who were selected to enroll in the academy. All subjects were submitted to an anthropometric evaluation by an experienced and same evaluator for the relative body fat result using the Jackson and Pollock equations by 3SF and 7SF combined with the Siri equation through the t-test of Student paired for dependent variables, and intraclass correlation, only when no significant difference. The equations reliability was expressed by the Bland and Altman analysis. All tests assumed α = 0.05. When comparing the results was observed a variation of 24.4 ± 4.3% for estimation using 3SF and 25.1 ± 4.5% for estimation using 7SF with a mean difference of 0.74 ± 2.0%, no significant difference (p = 0.06). In addition, a high correlation (r = 0.89, p <0.01) was observed between the equations. In conclusion, the results of the present study to estimate of relative body fat showed no significant difference between the Jackson and Pollock equations in women in academy of gymnastics with similar physical and anthropometric characteristics.
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