TABLE 4.

Descriptive statistics of study variables analyzed by cluster and differences among groups (t-student).

	Boys					Girls
	Low PF (45)		High PF (47)			Low PF (57)		High PF (61)
	M	SD	M	SD	t	M	SD	M	SD	t
HJT	145.60	19.33	205.43	16.91	15.82***	124.93	14.36	161.70	14.00	14.08***
5 × 10	19.14	1.72	17.37	1.34	−5.34***	20.22	1.91	19.60	1.69	–1.86
VO2max	40.61	7.37	50.22	7.78	6.08***	38.22	5.58	43.85	4.99	5.78***
D2-TR	46.29	17.45	65.34	18.73	5.04***	56.44	18.19	66.79	17.66	3.14**
D2-TA	48.51	18.07	65.87	20.24	4.33***	54.40	17.93	65.41	17.94	3.33**
D2-O	59.33	21.26	53.23	23.78	–1.30	50.65	18.28	48.52	19.74	–0.61
D2-C	56.64	16.69	50.72	17.97	–1.64	52.05	16.35	51.75	17.23	–0.09
D2-TOT	48.40	17.69	66.89	18.98	4.83***	56.49	16.98	67.02	17.71	3.29**
D2-CON	48.98	18.17	66.53	20.99	4.28***	55.07	17.37	65.21	17.62	3.15**
D2-VAR	54.29	19.80	47.70	20.71	–1.55	52.81	21.33	51.62	21.09	–0.30
D2-TR+	58.93	19.69	59.68	16.04	0.20	60.82	15.47	63.49	15.92	0.92
D2-TR−	51.27	15.56	72.02	19.87	5.56***	59.14	20.21	67.20	18.44	2.27*

HJT = Horizontal jump (cm); 5 × 10 = Speed test 5 × 10 meters (sec.); VO_2max = Maximum oxygen consumption (ml/kg/min); PF = Physical fitness; D2 = d2 test; TR = Total number of attempts; TA = Total successes; O = Omissions; C = Commissions; TOT = Total effectiveness in the test; CON = Concentration index; VAR = Variation index; TR+ = Line with the greatest number of attempted elements; TR− = Line with the least number of attempted elements. * p < 0.05 ** p < 0.01 *** p < 0.001.