Table 2.
Mechanical properties of muscle and tendon structures. Mean (SD).
| Experimental condition | Control condition | |||
|---|---|---|---|---|
| Before | Aftera | Before | After | |
| Increase in estimated muscle force during 250 deg·sec−1 (N) | 164.7 (32.7) | 157.9 (26.0) | 173.7 (35.8) | 173.1 (30.3) |
| Increase in fascicle length during 250 deg·sec−1 (mm) | 2.5 (0.4) | 3.1 (0.7) *** | 2.7 (1.1) | 2.5 (0.7) |
| Active muscle stiffness during 250 deg·sec−1 (N·mm−1) | 76.6 (19.4) | 59.2 (13.3) ** | 85.2 (33.7) | 84.2 (25.9) |
| Increase in estimated muscle force during 100 deg·sec−1 (N) | 140.2 (27.5) | 125.9 (19.50) * | 144.0 (29.4) | 139.6 (24.8) |
| Increase in fascicle length during 100 deg·sec−1 (mm) | 2.3 (0.5) | 2.5 (0.6) | 2.4 (0.7) | 2.4 (0.6) |
| Active muscle stiffness during 100 deg·sec−1 (N·mm−1) | 71.0 (17.2) | 58.3 (12.0) * | 72.5 (19.8) | 69.3 (12.6) |
| Peak passive muscle force during slow stretching (N) | 60.5 (14.0) | 69.6 (18.0) * | 65.6 (15.7) | 64.3 (14.5) |
| Maximal elongation of fascicle during slow stretching (mm) | 11.0 (2.4) | 9.7 (1.8) * | 9.5 (2.2) | 10.0 (2.2) |
| Passive muscle stiffness (N·mm−1) | 10.3 (4.2) | 16.3 (11.0) ** | 11.4 (4.2) | 11.6 (5.9) |
| Maximal elongation of tendon structures during ramp contraction (mm) | 18.5 (3.8) | 17.0 (3.3) | 18.6 (2.3) | 17.9 (2.6) |
| Stiffness of tendon structures during ramp contraction (N·mm−1) | 23.4 (4.7) | 22.0 (7.3) | 24.4 (8.2) | 26.0 (10.1) |
| Maximal elongation of tendon structures during ballistic contraction (mm) | 15.6 (3.7) | 12.8 (2.6) *** | 15.6 (3.49) | 15.4 (4.4) |
| Stiffness of tendon structures during ballistic contraction (N·mm−1) | 23.0 (4.9) | 23.3 (4.4) | 26.0 (9.6) | 24.1 (6.8) |
a
Significantly different from before (*P < 0.05, **P < 0.01, ***P < 0.001).