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Table 3 The ACE and ACTN3 genotype combinations and VO2max values for players of different positions

From: The ACE and ACTN3 polymorphisms in female soccer athletes

Positions ACE and ACTN3 Genotype Combinations   VO2max (ml/kg/min)
II + RR II + XR ID + RR ID + XR DD + RR DD + XR others
Forwards 0 12 4 4 4 0 0 51.05 ± 2.61
Midfielders 0 4 12 4 0 4 0 51.74 ± 3.88
Defenders 0 0 4 0 0 0 0 54.14 ± 2.39
Goalkeepers 4 4 0 0 0 0 0 52.11 ± 2.14
All athletes 4a 20a 20a 8a 4a 4a 0 52.66 ± 3.36
Controls 44 32 12 8 4 4 96  
  1. Notes: aχ2 = 11.952, df = 5, p = 0.035 for the comparison of the ACE and ACTN3 genotype combinations between all athletes and the control subjects