Table 1.
Resultant knee extension moment normalized to body mass as well as patellar tendon stiffness, elongation, proximal patellar tendon peak spatial frequency (PSF), patellar tendon resting length and lever arm, and number of athletes reporting patellar tendon symptoms (VISA-P score ≤ 87) at the four measurement time points (M1–M4)
| Control | Intervention | |||||||
|---|---|---|---|---|---|---|---|---|
| M1 n = 11 |
M2 n = 11 |
M3 n = 10 |
M4 n = 11 |
M1 n = 10 |
M2 n = 10 |
M3 n = 10 |
M4 n = 10 |
|
| Norm. moment (Nm/kg)* | 3.66 ± 0.2 | 3.78 ± 0.3 | 3.68 ± 0.4 | 3.96 ± 0.3 | 3.83 ± 0.6 | 3.96 ± 0.4 | 4.02 ± 0.5 | 4.09 ± 0.5 |
| Tendon force (kN)* | 5.02 ± 0.48 | 5.24 ± 0.48 | 5.01 ± 0.56 | 5.54 ± 0.49 | 5.38 ± 1.02 | 5.60 ± 0.86 | 5.70 ± 0.95 | 5.77 ± 0.91 |
| Stiffness (kN/mm) | 1.51 ± 0.49 | 1.65 ± 0.46 | 1.31 ± 0.28 | 1.60 ± 0.30 | 1.56 ± 0.39 | 1.63 ± 0.45 | 1.60 ± 0.53 | 1.74 ± 0.56 |
| Elongation (mm)* | 4.2 ± 0.4 | 4.3 ± 0.7 | 4.9 ± 0.7 | 4.7 ± 0.7 | 4.4 ± 1.4 | 4.6 ± 1.1 | 4.7 ± 1.1 | 4.1 ± 1.1 |
| PSF (mm−1) | 1.65 ± 0.2 | 1.73 ± 0.1 | 1.70 ± 0.3 | 1.73 ± 0.1 | 1.78 ± 0.1 | 1.79 ± 0.1 | 1.81 ± 0.1 | 1.69 ± 0.2 |
| Resting length (mm) | 51.8 ± 5.1 | 51.8 ± 4.9 | 50.2 ± 6.7 | 51.1 ± 5.5 | 51.1 ± 5.9 | 50.9 ± 6.2 | 51.0 ± 6.0 | 50.3 ± 5.6 |
| Lever arm (mm) | 59.7 ± 1.5 | 59.7 ± 1.6 | 59.4 ± 1.6 | 59.8 ± 1.5 | 59.3 ± 1.6 | 59.3 ± 1.6 | 58.7 ± 2.8 | 59.3 ± 1.6 |
| Symptomatic athletes | 1 | 1 | 3 | 1 | 3 | 3 | 1 | 2 |
Means ± standard deviation of the given experimental data
*Significant effect of time in the control group (p < 0.05)