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Table 1 Mean (SD) 1500 m, 3000 m, 5000 m, 10,000 m and marathon best running times in (a) males and (b) females in the three ACTN3 R577X genotypes

From: No association between ACTN3 R577X and ACE I/D polymorphisms and endurance running times in 698 Caucasian athletes

(a)
ACTN3R577X males RR
N = 380
34.7%
RX
N = 492
44.9%
XX
N = 224
20.4%
Additive
(RR = 0, RX = 1, XX = 2)
Recessive
(RR = RX = 0, XX = 1)
 Running time 1500 m (s) 232.6 (10.7)
43.5%
234.2 (13.2)
39.1%
234.0 (15.1)
17.4%
p = 0.54 p = 0.81
 Running time 3000 m (s) 509.6 (27.5)
37.2%
517.0 (28.0)
44.2%
518.1 (26.9)
18.6%
p = 0.08 p = 0.37
 Running time 5000 m (s) 902.1 (61.7)
33.6%
912.2 (61.8)
46.2%
913.2 (59.5)
20.2%
p = 0.25 p = 0.58
 Running time 10,000 m (s) 1860.9 (109.2)
34.8%
1885.7 (125.8)
42.9%
1889.3 (112.1)
22.4%
p = 0.22 p = 0.51
 Running time marathon (s) 9148.6 (593.0)
30.4%
9220.7 (582.1)
47.6%
9129.1 (581.6)
22.0%
p = 0.94 p = 0.41
(b)
ACTN3R577X females RR
N = 156
29.6%
RX
N = 301
57.1%
XX
N = 70
13.3%
Additive
(RR = 0, RX = 1, XX = 2)
Recessive
(RR = RX = 0, XX = 1)
 Running time 1500 m (s) 269.4 (15.4)
34.7%
268.3 (14.0)
55.6%
262.6 (15.4)
9.7%
p = 0.35 p = 0.30
 Running time 3000 m (s) 600.9 (44.7)
30.4%
602.8 (37.3)
61.6%
600.2 (48.5)
8.0%
p = 0.93 p = 0.89
 Running time 5000 m (s) 1028.2 (79.1)
29.2%
1048.9 (97.1)
59.4%
1048.2 (88.9)
11.5%
p = 0.39 p = 0.83
 Running time 10,000 m (s) 2067.6 (153.6)
27.7%
2101.0 (159.9)
57.4%
2067.6 (153.6)
14.9%
p = 0.61 p = 0.91
 Running time marathon (s) 10,796.4 (818.2)
28%
10,667.3 (695.3)
54%
10,675.3 (552.8)
18%
p = 0.36 p = 0.78
  1. All running times are expressed in seconds because statistical analyses were performed on times converted to seconds. The last two columns of the table correspond to the p-value of the linear regression, using an additive or a recessive genetic model. The percentage values represent the genotype proportions