Table 2.
Morphological and mechanical properties of tendon structures for plyometric and isometric training protocols [mean (SD)]
| Plyometric training | Isometric training | ||||
|---|---|---|---|---|---|
| Before | After | Before | After | ||
| Ramp | Maximal elongation (mm) | 21.3 (2.8) | 21.9 (3.3) | 21.3 (2.8) | 21.7 (2.8) |
| Stiffness (N·mm−1) | 22.6 (5.9) | 23.3 (5.0) | 23.7 (5.4) | 32.5 (8.7)** | |
| Hysteresis (%) | 20.5 (11.3) | 18.5 (7.9) | 20.4 (10.9) | 18.6 (9.2) | |
| Ballistic | Maximal elongation (mm) | 15.9 (3.5) | 18.2 (4.2) | 16.6 (2.7) | 16.0 (3.2) |
| Stiffness (N·mm−1) | 20.7 (5.9) | 20.9 (5.8) | 19.2 (4.0) | 24.2 (6.5)** | |
| Hysteresis (%) | 34.9 (8.9) | 35.4 (10.1) | 35.7 (9.3) | 34.3 (10.0) | |
| Cross‐sectional area (mm2) | 65.8 (7.8) | 64.8 (7.1) | 64.9 (7.8) | 66.0 (7.8) | |
Significantly different from before (**P < 0.01).