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Table 5 E, H and E/H ratio of cortical bone obtained by nanoindentation tests, mean ± SD

From: Effects of treadmill with different intensities on bone quality and muscle properties in adult rats

 

SED

EX12

EX16

EX20

Ct.L

 EL (GPa)

23.57 ± 3.85

24.15 ± 3.85

25.04 ± 3.84

20.71 ± 3.03a,b,c

 HL (GPa)

1.01 ± 0.21d

1.27 ± 0.49a,c,d

1.01 ± 0.17

0.92 ± 0.08

 EL/HL

24.10 ± 4.67b

21.62 ± 7.30

25.03 ± 3.26b

22.62 ± 3.01

Ct.T

 ET (GPa)

19.69 ± 2.97

21.56 ± 2.29a,d

20.97 ± 1.83a,d

18.74 ± 1.67

 HT (GPa)

0.88 ± 0.20c,d

0.89 ± 0.24d

0.97 ± 0.19d

0.74 ± 0.08

 ET/HT

22.87 ± 2.88b,d

25.91 ± 6.83

22.40 ± 4.31b

22.55 ± 3.31

  1. n = 12 in each group
  2. Ct.L longitudinal cortical bone, Ct.T transverse cortical bone, EL longitudinal modulus of indentation, ET transverse modulus of indentation, HL longitudinal indentation hardness, HT transverse indentation hardness, EL/HL ratio of longitudinal indentation modulus to indentation hardness, ET/HT ratio of transverse indentation modulus to indentation hardness, SED sedentary control group, EX12 exercise group with a speed of 12 m/min, EX16 exercise group with a speed of 16 m/min, EX20 exercise group with a speed of 20 m/min
  3. aStatistically different from SED (p < 0.05)
  4. bStatistically different from EX12 (p < 0.05)
  5. cStatistically different from EX16 (p < 0.05)
  6. dStatistically different from EX20 group (p < 0.05)
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