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首页> 外文期刊>Medicine and science in sports and exercise >Multicomponent cross-validation of minimum weight predictions for college wrestlers.
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Multicomponent cross-validation of minimum weight predictions for college wrestlers.

机译：高校摔跤手最低体重预测的多分量交叉验证。

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摘要

In 1998, the National Collegiate Athletic Association (NCAA) adopted a rule requiring that skinfolds (SF) or hydrostatic weighing (HW) be used to estimate minimum weight (MW) in college wrestlers. PURPOSE: To cross-validate the NCAA methods for estimation of MW using a multicomponent criterion (4C). METHODS: Criterion MW was calculated from body density (BD), bone mineral content (BMC), and total body water (TBW) using the 4C equation of Lohman (1992). BMC was measured by dual energy x-ray absorptiometry (DXA), TBW by deuterium dilution, and BD by HW. Subjects were Division I athletes from the University of Wisconsin (mean +/- SD; N = 33, age = 19.5 +/- 1.3 yr, height = 177.3 +/- 7.8 cm, weight = 74.2 +/- 9.3kg). RESULTS: There was no significant difference between mean MW from HW (69.6 +/- 8.5 kg) and SF (70.1 +/- 8.3 kg) ( P = 0.113), and between mean MW from HW (69.6 +/- 8.5 kg) and 4C (69.5 +/- 8.6 kg) ( P = 0.46). A clinically small, yet significant difference was seen when comparing mean MW from SF to 4C ( P = 0.013). The regression for the relationship between 4C and HW (y = 0.994 x HW + 0.294 kg, R2 = 0.985) and 4C and SF (y = 1.019 x SF - 1.885 kg, R2 = 0.979) did not significantly deviate from the line of identity. Pure error (PE) values of 1.04 kg and 1.35 kg were found for HW and SF, respectively. The difference between the methods was plotted as a function of the 4C criterion. The regression line for HW and 4C (y = -0.009x + 0.743, r = -0.07, P = 0.69) and SF and 4C (y = -0.038x + 3.259, r = -0.27, P = 0.13) suggest that no systematic differences in the prediction were associated with the size of the criterion. CONCLUSION: These data support the NCAA methods of HW and SF to predict MW when cross-validated using a 4C criterion in this sample.
机译：1998年，美国国家大学体育协会（NCAA）通过了一项规则，要求使用皮褶（SF）或静液压称量（HW）来估计大学摔跤运动员的最低体重（MW）。目的：使用多组分标准（4C）对用于估计分子量的NCAA方法进行交叉验证。方法：采用Lohman（1992）的4C方程，根据人体密度（BD），骨矿物质含量（BMC）和全身水含量（TBW）计算标准MW。 BMC通过双能X射线吸收法（DXA）测量，TBW通过氘稀释测量，BD通过HW测量。受试者是威斯康星大学的I级运动员（平均+/- SD; N = 33，年龄= 19.5 +/- 1.3岁，身高= 177.3 +/- 7.8 cm，体重= 74.2 +/- 9.3kg）。结果：HW（69.6 +/- 8.5 kg）和SF（70.1 +/- 8.3 kg）的平均MW（P = 0.113）和HW（69.6 +/- 8.5 kg）的平均MW之间没有显着差异。和4C（69.5 +/- 8.6公斤）（P = 0.46）。当比较从SF到4C的平均MW时，发现临床上很小但很显着的差异（P = 0.013）。 4C和HW（y = 0.994 x HW + 0.294 kg，R2 = 0.985）和4C和SF（y = 1.019 x SF-1.885 kg，R2 = 0.979）之间的关系回归没有显着偏离同一性线。硬件和SF的纯误差（PE）值分别为1.04 kg和1.35 kg。将方法之间的差异绘制为4C标准的函数。硬件和4C（y = -0.009x + 0.743，r = -0.07，P = 0.69）和SF和4C（y = -0.038x + 3.259，r = -0.27，P = 0.13）的回归线表明没有预测中的系统差异与标准的大小相关。结论：这些数据支持HW和SF的NCAA方法在本样本中使用4C标准进行交叉验证时预测分子量。

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