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. 2016 Apr 13;17:285. doi: 10.1186/s12864-016-2462-3

Table 1.

The 100-m, 200-m and 400-m best sprint times (average±SD) in males according to ACTN3 R577X genotype distribution

Caucasians African Ancestry
Running event/Genotype RR RX XX RR + DD + RX RR RX
100 m Male 10.55 ± 0.27
(n = 35)		 10.58 ± 0.33
(n = 44)		 10.77 ± 0.31
(n = 10)		 10.56 ± 0.32
(n = 47)		 10.26 ± 0.35
(n = 22)		 10.28 ± 0.30
(n = 11)
200 m Male 21.19 ± 0.53
(n = 35)		 21.29 ± 0.61
(n = 36)		 21.86 ± 0.54*
(n = 8)		 21.17 ± 0.52
(n = 41)		 20.53 ± 0.64
(n = 23)		 20.98 ± 0.72
(n = 11)
400 m Male 46.90 ± 1.29
(n = 44)		 47.41 ± 1.43
(n = 46)		 47.55 ± 1.42
(n = 9)		 46.82 ± 1.28
(n = 43)		 46.49 ± 1.66
(n = 18)		 47.29 ± 1.69
(n = 7)

*200-m (RR vs. RX vs. XX) P < 0.016