Table 4.
Distribution of injuries according to body location and type of injury in elite endurance runners with different ACTN3 R577X genotypes.
| Variable | All | RR | RX | XX | p-Value | |
|---|---|---|---|---|---|---|
| Body location | Groin (%) | 13.5 | 4.8 * | 13.2 | 37.5 * | 0.025 |
| Hip (%) | 1.0 | 2.4 | 0.0 | 0.0 | ||
| Thigh (%) | 15.6 | 14.3 | 13.2 | 25.0 | ||
| Knee (%) | 10.4 | 4.8 | 21.1 * | 0.0 | ||
| Lower leg (%) | 15.6 | 21.4 | 13.2 | 6.3 | ||
| Achilles tendon (%) | 11.5 | 19.0 * | 7.9 | 0.0 | ||
| Ankle (%) | 9.4 | 4.8 | 13.2 | 12.5 | ||
| Foot (%) | 16.7 | 19.0 | 13.2 | 18.8 | ||
| Other (%) | 6.3 | 9.5 | 5.3 | 0.0 | ||
| Type of injury | Strain/muscle rupture (%) | 19.6 | 22.7 | 15.0 | 22.2 | 0.295 |
| Stress fracture/other bone injury (%) | 13.7 | 11.4 | 10.0 | 27.8 | ||
| Tendinosis/tendinopathy (%) | 33.3 | 31.8 | 40.0 | 22.2 | ||
| Sprain/ligament injury (%) | 7.8 | 2.3 | 12.5 | 11.1 | ||
| Other (%) | 25.5 | 31.8 | 22.5 | 16.7 |
Data are frequencies (in percentage) from the total of injuries recorded in each genotype. (*) Different from expected value at p < 0.05.