Table 5.

Comparison on 20mSRT (speed at the last completed stage, km.h^-1) performance between Chinese children and youth and international standard.

		China			International[1]			t	P
	Age(yr)	N	Mean	SD	N	Mean	SD
Boy	9	3876	9.68	0.64	101532	10.03	0.85	-25.45	<0.01
	10	4160	9.80	0.67	81538	10.13	0.92	-23.08	<0.01
	11	4149	9.97	0.69	79660	10.25	1.00	-17.89	<0.01
	12	3868	10.24	0.81	70266	10.47	1.11	-12.45	<0.01
	13	3815	10.60	0.92	72913	10.73	1.21	-6.71	<0.01
	14	3826	10.83	0.96	65317	10.97	1.28	-6.51	<0.01
	15	4200	11.00	1.00	53287	11.12	1.33	-5.74	<0.01
	16	4273	11.02	1.03	35490	11.27	1.37	-11.48	<0.01
	17	3632	11.10	1.03	29123	11.41	1.42	-12.88	<0.01
	Total	35799			589126
Girls	9	3753	9.60	0.60	98166	9.71	0.70	-9.33	<0.01
	10	3704	9.70	0.59	81415	9.75	0.77	-3.57	<0.01
	11	3640	9.85	0.60	78029	9.79	0.83	4.32	<0.01
	12	3553	10.00	0.65	69497	9.83	0.88	11.51	<0.01
	13	3451	10.23	0.76	92491	9.86	0.91	23.40	<0.01
	14	3601	10.25	0.75	55035	9.89	0.93	22.52	<0.01
	15	4075	10.25	0.73	43730	9.91	0.94	22.43	<0.01
	16	4386	10.17	0.66	34978	9.93	0.95	16.40	<0.01
	17	3998	10.21	0.68	29559	9.96	0.97	16.04	<0.01
	Total	34161			552900

The ages shown represent age at last birthday (e.g. 17=17.00–17.99). [1]Tomkinson GR, Lang JJ, Tremblay MS, et al. International normative 20 m shuttle run values from 1,142,026 children and youth representing 50 countries. British Journal of Sports Medicine 51, 1545-1554.