Table 1.

Demographic, anthropometric and echocardiographic measurements of the study population.

Age (years)	Overall	Group 1:	Group 2:	Group 3:	Group 4:	Group 5:	Group 6:
		7–8	9–10	11–12	13–14	15–16	17–18
n (%)	2,151 (100)	141 (7)	448 (21)	524 (24)	546 (25)	383 (18)	109 (5)
Height (cm)	156.9 ± 15.9	132.8 ± 5.8 [2,3,4,5,6]	140.9 ± 7.0 [3,4,5,6]	151.6 ± 8.4 [4,5,6]	165.2 ± 8.9 [5,6]	173.9 ± 7.5 [6]	177.9 ± 6.1
Weight (kg)	49.8 ± 14.8	31.2 ± 6.6 [2,3,4,5,6]	37.1 ± 8.2 [3,4,5,6]	44.6 ± 9.5 [4,5,6]	55.1 ± 10.5 [5,6]	65.3 ± 9.6 [6]	69.6 ± 8.9
Training (hr/week)	7.3 ± 1.2	6.3 ± 0.8 [3,4,5,6]	6.3 ± 0.7 [3,4,5,6]	7.0 ± 1.2 [4,5,6]	8.1 ± 0.7	8.1 ± 0.8	8.2 ± 0.9
Duration of training (months)	29.7 ± 12.7	12.3 ± 1.6 [2,3,4,5,6]	14.5 ± 8.6 [3,4,5,6]	28.4 ± 12.2 [4,5,6]	32.7 ± 16.1 [5,6]	41.4 ± 6.0 [6]	64.3 ± 5.7
SBP (mmHg)	110.0 ± 10.6	103.7 ± 12.0 [3,4,5,6]	105.2 ± 10.7 [3,4,5,6]	108.1 ± 9.4 [4,5,6]	112.6 ± 9.2 [5,6]	114.9 ± 9.4	117.0 ± 7.9
DBP (mmHg)	69.2 ± 7.3	65.6 ± 8.3 [3,4,5,6]	66.7 ± 7.2 [3,4,5,6]	67.9 ± 6.6 [4,5,6]	70.6 ± 6.8 [6]	71.8 ± 6.9	73.3 ± 5.9
LVEDD (mm)	46.1 ± 4.9 (25.0, 58.0)	40.4 ± 3.3 (25.0, 48.0) [2,3,4,5,6]	42.4 ± 3.3 (32.0, 54.0) [3,4,5,6]	44.6 ± 3.6 (33.0, 55.0) [4,5,6]	48.0 ± 3.9 (36.0, 58.0) [5,6]	50.6 ± 3.4 (37.0, 58.0)	51.2 ± 3.7 (35.0, 58.0)
LV Mass (g)	106.1 ± 32.7 (35.4, 234.3)	69.5 ± 15.3 (37.6, 118.2) [2,3,4,5,6]	80.5 ± 17.4 (35.4, 142.9) [3,4,5,6]	94.1 ± 21.6 (41.1, 199.3) [4,5,6]	119.0 ± 27.8 (55.9, 234.3) [5,6]	137.0 ± 24.7 (44.8, 213.9)	142.7 ± 26.9 (51.3, 205.5)

Data expressed as mean±sd or as absolute count (% of total). SBP, systolic blood pressure; DBP, diastolic blood pressure; LVEDD, left ventricular end-diastolic diameter; LV, left ventricular.

p < 0.05 current group vs. the other group, pairwise comparisons with Bonferroni adjustment for multiple comparisons.