Table 2. Lung volumes of the subjects. Data are means (±SD).

	Players Children		Control children		Sylvester et al. 2005 Afro-Caribbean children (n = 80) 9 (4.3-17.8) yrs	Cotes et al. 1973 British boy twins 11.6 (8-16) yrs
	test 1	test 2	test 1	test 2
	1	2	3	4
RV (L)	.80 (.20)	.90 (.27)1, 4	.87 (.14) 4	1.20 (.37) 2, 3	.78 (.31)	.62 (.22)
VC (L)	2.10 (.30)	2.50 (.54)	2.20 (.50)	2.20 (.57)	1.92 (.78)	2.43 (.86)
TLC (L)	3.00 (.46)	3.40 (.66)	3.10 (.39)	3.50 (.85)	2.70 (.90)	3.09 (1.10)