Table I.
Geometric and biomechanical properties.
| Group | Shoulders | Area (mm2)∗ | Maximum stress (Mpa)∗ | Load to failure (N)∗ | Stiffness (N/mm)∗ |
|---|---|---|---|---|---|
| Caffeine group | |||||
| 2 Weeks | 13 | 6.2 (1.9) | 2.3 (1.5) | 12.4 (6.6) | 9.8 (5.6) |
| 4 Weeks | 9 | 5.3 (1.7) | 4.9 (1.8) | 23.3 (4.9) | 15.3 (6.9) |
| 8 Weeks | 11 | 5.8 (1.7) | 4.6 (2.1) | 24.1 (6.9) | 9.7 (5.9)† |
| Noncaffeine group | |||||
| 2 Weeks | 8 | 6.0 (1.7) | 2.9 (2.0) | 15.0 (8.2) | 10.3 (8.4) |
| 4 Weeks | 13 | 5.5 (1.7) | 4.4 (2.5) | 21.6 (7.9) | 13.1 (5.3) |
| 8 Weeks | 11 | 5.8 (1.7) | 4.9 (1.6) | 26.9 (7.0) | 14.1 (2.8)† |
∗
Values are presented as means with standard deviations in parentheses.
†
The comparison between groups is statistically significant at P < .05.