Descriptive statistics profile of functional and somatometric characteristics for players with injured and uninjured quadriceps (N=100)
| Quadriceps injured soccer players (N=7) | Quadriceps uninjured soccer players (N=93) | |
|---|---|---|
| Age (years) | 25.42 (5.28) | 23.42 (2.76) |
| Weight (kg) | 72.35 (4.69) | 73.42 (3.36) |
| Height (cm) | 176.41 (4.68) | 180.81 (2.76) |
| RightM (SD) | LeftM (SD) | RightM (SD) | LeftM (SD) | ||
|---|---|---|---|---|---|
| Quadriceps isokinetic strength (Nm) | Con 60°/s | 231.61 (29.46) | 241.17 (29.99) | 241.14 (2.48) | 233.57 (27.33) |
| Con 180°/s | 160.20 (21.90) | 168.41 (25.47) | 167.50 (26.33) | 167.94 (22.41) | |
| Con 300°/s | 131.40 (16.23) | 142.97 (18.98) | 133.61 (19.40) | 132.52 (11.97) | |
| Ecc 60°/s | 324.94 (48.07) | 305.25 (49.52) | 269.64 (92.21) | 269.14 (76.45) | |
| Ecc 180°/s | 295.68 (62.44) | 315.60 (55.84) | 243.22 (79.95) | 225.98 (79.43) | |
| Knee functional strength ratio | Hamstrings/quadriceps 180°/s | 1.15 (0.22) | 1.13 (0.17) | 1.35 (0.28) | 1.08 (0.40) |
| Muscle flexibility (°) | Quadriceps flexibility | 158.42 (1.51) | 152.71 (5.58) | 159.00 (2.6) | 147.28 (7.01) |
| Proprioception (percentage deterioration) | Kinaesthesis | 43.73 (12.63) | 61.73 (35.18) | 22, 19 (7.60) | 23.57 (9.82) |
| Anthropometrics (cm) | Mid-thigh girth* | 51.77 (3.13) | 51.90 (2.91) | 54.05 (1.06) | 53.28 (0.76) |
| Lower-leg functional length* | 91.44 (3.92) | 91.57 (4.03) | 93.54 (5.57) | 94.05 (5.48) | |
| Joint stability (mm) | Anterior knee laxity | 7.71 (1.88) | 9.14 (2.67) | 7.14 (1.34) | 8.57 (3.20) |
↵* Intratester reliability (body sides): (1) technical error of measurements<1%; (2) intraclass correlation coefficient>0.98.
Con, concentric; Ecc, eccentric.