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Table 2 Effect of ACTN3 genotype in older Caucasian women in test performance gains during training

From: The influence of ACE ID and ACTN3 R577X polymorphisms on lower-extremity function in older women in response to high-speed power training

   Moments Repeated measures 2-way ANOVA
Performance measures ACTN3 genotype (n = 139) T1 T2 Training effect (within subjects) P value Genotype effect (between subjects) P value
х±σ х±σ
S10 (m/s) RX (n = 54) 5.5 ± 0.7 4.9 ± 0.6a 0.001 0.044
  RR (n = 52) 5.6 ± 0.6 4.8 ± 0.6b
  XX (n = 33) 5.9 ± 0.9 5.2 ± 0.9
P*   0.080 0.050   
GUG (sec.) RX 5.3 ± 0.9 4.7 ± 0.7 0.001 0.477
  RR 5.2 ± 0.8 4.6 ± 0.5
  XX 5.3 ± 0.8 4.9 ± 0.7
P*   0.615 0.139   
  1. Legend: Values are mean ± SD; n, no. of subjects. Pre-training and post-training, before (T1) and after (T2) 12-week of high-speed power training, respectively. All reported values were measured at maximum effort. *P values (P < 0.001) were computed by one-way and 2-way ANOVA. aP < 0.001, RX significantly different from XX; bP < 0.001, RR significantly different from XX.