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ACTN3 577X allele frequency amongst power-oriented athletes and controls is shown. X allele genotype frequency in controls was 40,35%. By comparison, it was 30,69% (P=0.005); 27.08% (P=0.014); 31.48% (P=0.085) and 32.14%% (P=0.106) for all athletes, sprinters, sprint swimmers and weightlifters.
