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Table 1 Means and standard deviation of femoral parameters in control and exercise-treated mice of both age groups

From: Mechanically-induced osteogenesis in the cortical bone of pre- to peripubertal stage and peri- to postpubertal stage mice

  7-week mice 11-week mice
  Control Exercised Control Exercised
Endosteal perimeter (mm) 3.64 (0.14) 3.73 (0.16) 3.73 (0.15)a 3.85 (0.32)a
Periosteal perimeter (mm) 2.02 (0.18) 2.03 (0.13) 4.69 (0.14)a 4.83 (0.27)a, b
Cortical area (mm2) 0.50 (0.15) 0.52 (0.09) 0.55 (0.04)a 0.61 (0.04)a
Medullary area (mm2) 0.31 (0.05) 0.32 (0.04) 0.93 (0.07)a 0.98 (0.14)a
Periosteal area (mm2) 0.81 (0.15) 0.84 (0.08) 1.49 (0.10)a 1.59 (0.17)a, b
Area of endocortical bone growth (μm2) 26.50 (2.41) 44.66 (3.48) 35.60 (1.13) 51.20 (1.68)b
Area of periosteal bone growth (μm2) 9.37 (0.28) 9.94 (0.19) 7.30 (0.68) 16.20 (0.62)a, b, c
Total bone growth area (μm2) 35.87 (2.38) 54.59 (3.37) 42.90 (1.46) 67.40 (1.55)b
Bone formation rate (μm2/day) 2.56 (1.69) 3.91 (2.41) 3.06 (1.04) 4.81 (1.11)b
  1. a Significant difference between age groups by exercise treatment group
  2. b Significant difference between exercise treatment groups by age group
  3. c Significant age group and exercise treatment group interaction