Table 1 Frequency and percentages of swimmers in the different Tanner maturation stages.

	Stage 1		Stage 2		Stage 3		Stage 4		Stage 5
	N	%	N	%	N	%	N	%	N	%
Boys	0	0	16	28.6	20	35.7	9	16.1	11	19.6
Girls	0	0	6	10.3	18	31.1	29	50.0	5	8.6