Table 3. Geometry measurement in cross-section of cortical bone. Values are means (±SEM).
|
1-Week |
2-Week |
4-Week |
8-Week |
| L1 |
C1 |
L2 |
C2 |
L4 |
C4 |
L8 |
C8 |
| Femur |
n=12 |
n=12 |
n=12 |
n=12 |
n=12 |
n=11 |
n=12 |
n=12 |
| Iml (mm4) |
6.67 (.30) |
6.96 (.31) |
6.46 (.36) |
6.70 (.37) |
8.40 (.45) |
7.41 (.37) |
8.79 (.51) |
8.18 (.35) |
| Ct.Ar (mm2) |
6.24 (.15) |
6.78 (.12) |
6.43 (.26) |
6.45 (.13) |
7.25 (.09) |
6.81 (.10)** |
7.80 (.10) |
7.59 (.14) |
| Tt.Ar (mm2) |
10.77 (.21) |
10.85 (.31) |
10.67 (.28) |
10.76 (.27) |
11.67 (.23) |
11.00 (.27) |
11.92 (.26) |
11.74 (.18) |
| Ct.Th (mm) |
.63 (.01) |
.69 (.01)*** |
.66 (.02) |
.66 (.01) |
.72 (.01) |
.69 (.01)* |
.78 (.01) |
.75 (.01) |
| Tibia |
n=10 |
n=12 |
n=10 |
n=9 |
n=12 |
n=12 |
n=12 |
n=12 |
| Ct. vBMD (g/cm3) |
3.50 (.22) |
3.50 (.29) |
2.91 (.19) |
3.17 (.24) |
3.56 (.20) |
3.40 (.16) |
3.87 ± 0.10 |
3.41 (.16)* |
| Ct. BMC (mg) |
4.50 (.13) |
4.32 (.15) |
4.23 (.21) |
4.59 (.19) |
5.13 (.11) |
5.07 (.11) |
5.43 ± 0.07 |
5.09 (.10)** |
| Ct. vBMD (g/cm3) |
7.51 (.22) |
7.40 (.35) |
6.86 (.31) |
6.87 (.33) |
7.44 (.20) |
7.31 (.16) |
7.58 ± 0.12 |
7.33 (.17) |
| Ct. BMC (mg) |
.55 (.02) |
.52 (.02) |
.54 (.03) |
.59 (.01) |
.65 (.01) |
.65 (.01) |
0.70 ± 0.02 |
.65 (.01)** |
*,** and *** denote p ≤ 0.05, 0.01 and 0.001, respectively, between landing group to the time-matched sedentary control group. I
ml, moment of inertia about the mediolateral axis for femora; I
ap, moment of inertia about the antero-posterior axis for tibiae; Ct.Ar, cortical bone area; Tt.Ar, total cross-sectional area inside the periosteal envelope; Ct.Th, average cortical thickness.
