Table 2.
Effect of cyclic loading on humerus bone strength in rats fed a normal or a low protein diet.
| Dietary protein | ||||
|---|---|---|---|---|
| 15% controls | 15% contralateral cyclically loaded | 2.5% controls | 2.5% contralateral cyclically loaded | |
| Maximal load (N) | 92.3 ± 2.9 | 90.8 ± 2.8 | 87.1 ± 2.5 | 77.8 ± 4.8 |
| Stiffness (N/mm) | 236.6 ± 16.5 | 272.8 ± 17.9 | 237.5 ± 12.4 | 218.6 ± 22.5 |
| Yield point (N) | 71.8 ± 3.6 | 71.4 ± 1.6 | 64.4 ± 2.7 | 67.1 ± 3.3 |
| Maximal energy (N∗mm) | 24.2 ± 1.4 | 20.6 ± 1.0* | 20.8 ± 0.7 | 17.9 ± 1.2 |
| Elastic energy (N∗mm) | 12.3 ± 1.5 | 10.4 ± 0.8 | 9.1 ± 0.8 | 11.4 ± 0.8 |
| Plastic energy (N∗mm) | 11.9 ± 0.9 | 10.3 ± 1.4 | 11.7 ± 0.7 | 6.6 ± 1.2° |
Values are means ± SEM.
*P < 0.05 versus 15% controls as evaluated by Student's t-test.
°P < 0.05 versus 2.5% controls as evaluated by Student's t-test.