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Table 1 Intramuscular fat volume, skeletal muscle volume, and intramuscular fat content of thigh muscle groups in young and old adults

From: Three-dimensional comparison of intramuscular fat content between young and old adults

 

Quadriceps

Hamstrings

Adductor

Whole thigh

Young

Old

Young

Old

Young

Old

Young

Old

IMF

64.4 (32.1)

66.5 (15.0)

41.1 (24.4)

51.7 (13.4)

55.8 (39.2)

46.7 (16.3)

161.3 (93.1)

164.9 (39.4)

Skeletal muscle

1304.2 (373.2)

824.3 (247.2)*

438.5 (132.3)

316.7 (80.5)*

655.2 (226.4)

475.8 (161.1)*

2397.9 (712.1)

1616.8 (469.0)*

Normalized IMF

1.0 (0.4)

1.2 (0.2)

0.6 (0.3)

0.9 (0.2)*

0.9 (0.5)

0.8 (0.3)

2.5 (1.1)

2.9 (0.6)

Normalized skeletal muscle

20.7 (3.8)

14.4 (2.8)*

7.0 (1.5)

5.6 (1.1)*

10.4 (2.7)

8.2 (1.9)*

38.1 (7.6)

28.2 (5.2)*

Volume-based IMF content

4.8 (2.2)

7.8 (2.4)*

8.6 (4.7)

14.4 (3.7)*

8.3 (5.4)

9.5 (3.7)

6.5 (3.3)

9.7 (2.9)*

  1. All values are mean (SD). IMF; intramuscular fat. Unit of IMF and skeletal muscle is cubic centimeter (cm3), normalized IMF and skeletal muscle is cubic centimeter per body weight (cm3/body weight), and volume-based.IMF content is percentage (%). The whole thigh comprises the QF, HM, and AD
  2. Significant difference with young *P < 0.05