Table 4. Histomorphometric analysis of the trabecular bone parameters in the femur.
| FEMALE | MALE | |||
| Sedentary (n = 10) | Trained (n = 11) | Sedentary (n = 10) | Trained (n = 9) | |
| Structural parameter | ||||
| Trabecular Volume (BV/TV, %)* | 37.1±3.6 | 43.5±5.3# | 30.0±3.0 | 36.0±4.0# |
| Trabecular Number (Tb.N,/mm)* | 6.1±0.3 | 6.3±0.5 | 5.1±0.5 | 4.8±0.7 |
| Trabecular Thickness (Tb.Th, µm) | 61.8±8.0 | 69.0±5.1# | 59.0±6.2 | 76.0±11.0# |
| Trabecular Separation (Tb.Sp, µm)* | 103.0±5.0 | 91.0±16.0 | 141.0±21.0 | 135.0±23.0 |
| Number of Osteocytes (N.Ot/B.Ar,/mm2) | 407.2±116.7 | 389.2±52.4 | 486.4±79 | 552.6±133# |
| Formation parameter | ||||
| Osteoid Thickness (O.Th, µm) | 1.2±0.1 | 1.4±0.2 | 1.2±0.1 | 1.3±0.2 |
| Osteoid surface (OS/BS, %) | 4.8±3.0 | 6.0±3.4 | 5.0±2.2 | 5.6±1.4 |
| Osteoblast surface (Ob.S/BS, %) | 3.6±2.4 | 4.7±2.7 | 3.9±2.5 | 4.7±1.1 |
| Osteoblast number (N.Ob/T.Ar,/mm2) | 21.0±9.9 | 25.0±14.0 | 16.0±9.2 | 20.0±8.5 |
| Mineralizing surface (MS/BS, %) | 3.7±2.0 | 4.5±1.5 | 3.7±1.4 | 4.5±0.9 |
| Mineral apposition rate (MAR, µm/day)* | 0.53±0.2 | 0.59±0.1 | 0.64±0.1 | 0.88±0.1# |
| Bone formation rate (BFR/BS, µm3/µm2/day) | 0.02±0.02 | 0.02±0.01 | 0.02±0.005 | 0.04±0.008# |
| Resorption parameter | ||||
| Eroded Surface (ES/BS, %)* | 4.4±1.96 | 3.4±1.6 | 6.3±3.0 | 6.5±1.8 |
| Osteoclast Surface (Oc.S/BS, %)* | 0.93±0.41 | 0.85±0.53 | 1.56±1.0 | 1.57±0.46 |
| Osteoclast number (N.Oc/T.Ar,/mm2) | 3.62±1.5 | 3.31±2.1 | 4.37±2.2 | 4.32±1.4 |
*
indicates main effect of sex (p<0.05);
#
indicates p<0.05 for within-sex comparisons (sedentary vs. trained animals).