...对其后的结果产生影响，我们采用SPSS19.0统计软件分析，并将day0数值最为协变量，那么在定义重复测量的次数（Number of levels）时应为5次（1,3,7,14,30）还是6次（0,1,3,7,14,30）？
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体育测量中，通过增加重复测量次数可减小随机误差，达到提高测量的可靠性。
In sports measurement, repeated measurement will reduce random errors and increase reliability of the measurement.
根据测量指标的特点确定合理的重复测量次数和取值方式。
Make sure the reasonable repeat time and the way to assume value according to the characteristics that measure the index sign.
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