Table 2.
Body fatness, thigh volume, distance obtained in the sit-and-reach test, and ankle dorsiflexion in ACTN3 RR, RX and XX recreational marathon runners. Data are mean ± SD for each genotype. ES = Effect size calculated with Hedges’ g; CI = Confidence interval. Degrees of freedom = 2, between-groups; 133, intra-group; 135, total.
| Variable (Units) | RR | RX | XX | ES ± 95% CIRR vs. RX |
ES ± 95% CIRR vs. XX |
ES ± 95% CIRX vs. XX |
p | η2 |
|---|---|---|---|---|---|---|---|---|
| Body fat (%) | 15.7 ± 5.8 | 16.2 ± 6.1 | 18.8 ± 5.5 | 0.1 ± 0.3 | 0.5 ± 0.4 | 0.4 ± 0.3 | 0.024 | 0.06 |
| Thigh volume (mL/kg) | 60.5 ± 6.9 | 58.9 ± 9.5 | 56.8 ± 9.6 | −0.2 ± 0.3 | −0.4 ± 0.3 | −0.2 ± 0.3 | 0.043 | 0.05 |
| Sit-and-reach test (cm) | 15.5 ± 10.1 | 15.3 ± 7.8 | 18.4 ± 9.9 | 0.0 ± 0.3 | 0.3 ± 0.4 | 0.4 ± 0.4 | 0.046 | 0.04 |
| Right-ankle dorsiflexion (degrees) | 54.8 ± 5.8 | 55.9 ± 5.0 | 57.7 ± 5.1 | 0.2 ± 0.3 | 0.5 ± 0.5 | 0.4 ± 0.4 | 0.044 | 0.05 |
| Left-ankle dorsiflexion (degrees) | 55.6 ± 4.8 | 57.1 ± 5.6 | 58.1 ± 5.1 | 0.3 ± 0.3 | 0.5 ± 0.5 | 0.2 ± 0.5 | 0.103 | 0.03 |