Different Short-Term Mild Exercise Modalities Lead to Differential Effects on Body Composition in Healthy Prepubertal Male Rats

Table 1

Comparison of bone morphometric properties as determined by µCT. Trabecular and cortical variables were measured at the distal physis of the right femur in the exercise groups. WEX rats had higher cortical cross-sectional thickness. There was a trend towards differences in open porosity and total porosity between CON and WEX but these did not reach statistical significance ( and , resp.). CON: control; BPS: bipedal stance; WEX: wheel exercise. Data are mean ± SEM; per group. for CON versus WEX.

Trabecular bone	CON	BPS	WEX
Bone volume (mm^3)	0.71 ± 0.06	0.66 ± 0.08	0.70 ± 0.06
Percent bone volume (%)	4.41 ± 0.29	4.30 ± 0.47	4.35 ± 0.38
Bone mineral density (g/cm^3)	0.089 ± 0.006	0.093 ± 0.009	0.095 ± 0.006
Trabecular thickness (mm)	0.04 ± 0.00	0.04 ± 0.00	0.04 ± 0.00
Trabecular separation (mm)	0.50 ± 0.04	0.49 ± 0.04	0.51 ± 0.03
Trabecular number (mm^−1)	1.15 ± 0.07	1.08 ± 0.12	1.08 ± 0.09
Trabecular pattern factor (mm^−1)	28.28 ± 0.79	28.02 ± 1.01	27.04 ± 0.9
Structure model index (no units)	2.07 ± 0.03	2.1 ± 0.04	2.07 ± 0.04
Connectivity density (1/mm^3)	82.07 ± 20.02	74.30 ± 26.27	73.85 ± 26.11
Cortical bone	CON	BPS	WEX
Periosteal volume (mm^3)	7.49 ± 0.15	7.27 ± 0.16	7.47 ± 0.24
Endosteal volume (mm^3)	5.51 ± 0.14	5.26 ± 0.14	5.40 ± 0.20
Bone volume (mm^3)	1.98 ± 0.03	2.01 ± 0.04	2.07 ± 0.05
Percent bone volume (%)	26.48 ± 0.54	27.67 ± 0.50	27.81 ± 0.46
Tissue mineral density (g/cm^3)	1.084 ± 0.019	1.129 ± 0.018	1.126 ± 0.009
Mean polar moment of inertia (mm^4)	6.48 ± 0.22	6.35 ± 0.29	6.73 ± 0.37
Cross-sectional thickness (mm)	0.098 ± 0.005	0.112 ± 0.004	0.113 ± 0.00
Open porosity (%)	12.31 ± 1.19	9.68 ± 0.77	9.40 ± 0.66
Total porosity (%)	12.60 ± 1.15	10.07 ± 0.75	9.83 ± 0.66