Table 4 Comparison of Z-scores for the five physical fitness indicators among different BMI levels for girls in Xinjiang, China

grip strength

7-9 yrs

109

−0.889 (0.886)

218

− 0.564 (0.882)

1532

−0.486 (1.017)

218

−0.115 (1.051)

109

0.005 (1.066)

0.4^a

0.4^a

0.8^a

0.9^a

0.1

0.5^a

0.6^a

0.4^a

0.5^a

0.1

10-12 yrs

104

−1.182 (0.950)

212

−0.956 (0.833)

1478

−0.506 (1.050)

212

0.102 (1.116)

104

0.221 (1.209)

0.3

0.7^a

1.2^a

1.3^a

0.5^a

1.1^a

1.1^a

0.6^a

0.6^a

0.1

13-15 yrs

108

−0.932 (0.913)

215

−0.674 (0.915)

1520

−0.226 (1.105)

216

0.132 (1.247)

107

−0.013 (1.181)

0.3^a

0.7^a

1.0^a

0.9^a

0.4^a

0.7^a

0.6^a

0.3^a

0.2

0.1

16-18 yrs

109

−0.674 (1.064)

225

−0.419 (1.304)

1556

−0.182 (1.231)

223

−0.013 (1.496)

110

0.229 (1.248)

0.2

0.4^a

0.5^a

0.8^a

0.2^a

0.3^a

0.5^a

0.1

0.3^a

0.2

standing long jump

7-9 yrs

109

−0.609 (1.019)

218

−0.706 (1.043)

1532

−0.631 (0.998)

218

−0.730 (1.025)

109

−0.798 (0.862)

0.1

0.0

0.1

0.2

0.1

0.0

0.1

0.1

0.2

0.1

10-12 yrs

104

−0.776 (0.980)

212

−0.605 (0.916)

1478

−0.527 (0.971)

212

−0.680 (1.019)

104

−0.881 (1.053)

0.2

0.3^a

0.1

0.1

0.1

0.1

0.3^a

0.2^a

0.3^a

0.2

13-15 yrs

108

−0.352 (1.013)

215

−0.396 (1.003)

1520

−0.402 (1.000)

216

−0.484 (0.975)

107

−0.812 (1.074)

0.0

0.0

0.1

0.4^a

0.0

0.1

0.4^a

0.1

0.4^a

0.3^a

16-18 yrs

109

−0.317 (0.983)

225

−0.125 (0.943)

1556

−0.387 (0.983)

223

−0.557 (1.011)

110

−0.650 (0.937)

0.2

0.1

0.2^a

0.3^a

0.3^a

0.4^a

0.6^a

0.2^a

0.3^a

0.1

sit and reach

7-9 yrs

109

−1.051 (0.822)

218

−0.824 (0.899)

1532

−0.600 (0.927)

218

−0.375 (0.969)

109

−0.388 (0.988)

0.3^a

0.5^a

0.8^a

0.7^a

0.2^a

0.5^a

0.5^a

0.2^a

0.2^a

0.0

10-12 yrs

104

−0.717 (0.833)

212

−0.624 (0.800)

1478

−0.471 (0.873)

212

−0.292 (0.808)

104

−0.350 (0.871)

0.1

0.3^a

0.5^a

0.4^a

0.2^a

0.4^a

0.3^a

0.2^a

0.1

0.1

13-15 yrs

108

−0.736 (0.719)

215

−0.644 (0.825)

1520

−0.468 (0.882)

216

−0.450 (0.925)

107

−0.501 (0.868)

0.1

0.3^a

0.3^a

0.3^a

0.2^a

0.2^a

0.2

0.0

0.0

0.1

16-18 yrs

109

−0.623 (0.804)

225

−0.515 (0.941)

1556

−0.370 (0.871)

223

−0.292 (0.858)

110

−0.209 (0.867)

0.1

0.3^a

0.4^a

0.5^a

0.2^a

0.2^a

0.3^a

0.1

0.2

0.1

50 m dash

7-9 yrs

109

0.865 (1.158)

218

0.898 (1.190)

1532

0.671 (1.079)

218

0.524 (0.871)

109

0.712 (1.023)

0.0

0.2

0.3^a

0.1

0.2^a

0.4^a

0.2

0.1

0.0

0.2

10-12 yrs

104

0.774 (1.208)

212

0.644 (0.998)

1478

0.501 (1.049)

212

0.645 (1.039)

104

0.925 (1.109)

0.1

0.2^a

0.1

0.1

0.1

0.0

0.3^a

0.1

0.4^a

0.3^a

13-15 yrs

108

0.182 (1.001)

215

0.276 (1.104)

1520

0.268 (1.089)

216

0.434 (1.126)

107

0.570 (1.163)

0.1

0.1

0.2

0.4^a

0.0

0.1

0.3^a

0.1

0.3^a

0.1

16-18 yrs

109

0.189 (1.000)

225

0.205 (1.072)

1556

0.291 (1.046)

223

0.345 (1.061)

110

0.488 (1.044)

0.0

0.1

0.2

0.3^a

0.1

0.1

0.3^a

0.1

0.2

0.1

endurance run

7-9 yrs

109

0.582 (1.079)

218

0.518 (1.021)

1532

0.527 (1.018)

218

0.653 (0.986)

109

1.133 (1.534)

0.1

0.1

0.1

0.4^a

0.0

0.1

0.5^a

0.1

0.5^a

0.4^a

10-12 yrs

104

0.685 (1.221)

212

0.592 (1.311)

1478

0.674 (1.571)

212

1.084 (1.695)

104

1.618 (2.745)

0.1

0.0

0.3^a

0.4^a

0.1

0.3^a

0.5^a

0.3^a

0.4^a

0.2^a

13-15 yrs

108

0.188 (0.841)

215

0.195 (1.074)

1520

0.239 (1.070)

216

0.454 (1.001)

107

1.049 (1.092)

0.0

0.1

0.3^a

0.9^a

0.0

0.2^a

0.8^a

0.2^a

0.7^a

0.6^a

16-18 yrs

109

0.234 (1.180)

225

0.084 (1.239)

1556

0.109 (1.136)

223

0.271 (1.098)

110

0.605 (1.222)

0.1

0.1

0.0

0.3^a

0.0

0.2

0.4^a

0.1^a

0.4^a

0.3^a