Table 5 Weight and composition of quadriceps and gastrocnemius in different groups.

From: Effects of protein intake from an energy-restricted diet on the skeletal muscle composition of overweight and obese rats

  

Muscle weight (g)

Protein weight (g)

Fat weight (mg)

Protein content in muscle (mg/g)

Fat content in muscle (mg/g)

Quadriceps femoris

NC

12.70 \(\pm \) 1.23a,c

2.64 \(\pm \) 0.34a

83.71 ± 8.93a

207.82 \(\pm \) 10.29a

6.59 ± 0.70b

MC

14.44 \(\pm \) 1.57a

4.61 \(\pm \) 0.33b

98.27 ± 3.52b

321.97 \(\pm \) 41.65b

6.81 ± 0.24a

LP

12.28 \(\pm \) 1.62c

3.29 \(\pm \) 0.37c

28.86 ± 1.49c

268.50 \(\pm \) 11.33c

2.35 ± 0.12c

NP

10.23 \(\pm \) 0.78b

2.59 \(\pm \) 0.10a

18.00 ± 0.96d

254.29 \(\pm \) 14.01c

1.76 ± 0.09d

HP

10.24 \(\pm \) 1.03b

2.50 \(\pm \) 0.26a

21.91 ± 0.23c

245.41 \(\pm \) 23.62c

2.14 ± 0.02c

Male

Gastrocnemius

NC

5.81 \(\pm \) 0.60a,b

1.21 \(\pm \) 0.09a

8.29 \(\pm \) 0.77a

201.40 \(\pm \) 10.66a

1.38 \(\pm \) 0.13b

MC

6.01 \(\pm \) 0.10a

1.89 \(\pm \) 0.14b

9.95 \(\pm \) 1.17b

327.00 \(\pm \) 28.38b

1.71 \(\pm \) 0.20a

LP

5.38 \(\pm \) 0.38b

1.23 \(\pm \) 0.12a

3.47 \(\pm \) 0.15c

226.78 \(\pm \) 10.00c

0.63 \(\pm \) 0.03c

NP

5.31 \(\pm \) 0.46b

1.38 \(\pm \) 0.16a

2.43 \(\pm \) 0.27d

260.59 \(\pm \) 13.17c

0.46 \(\pm \) 0.05d

HP

5.40 \(\pm \) 0.07b

1.25 \(\pm \) 0.09a

3.12 \(\pm \) 0.11c

237.55 \(\pm \) 23.62c

0.58 \(\pm \) 0.02c

Quadriceps femoris

NC

6.47 \(\pm \) 0.31a,b

1.36 \(\pm \) 0.15a

15.99 \(\pm \) 1.23a

210.09 \(\pm \) 23.62a

2.47 \(\pm \) 0.19a

MC

7.06 \(\pm \) 0.61a

2.23 \(\pm \) 0.17b

28.83 \(\pm \) 2.35b

320.85 \(\pm \) 21.66b

4.08 \(\pm \) 0.33b

LP

6.17 \(\pm \) 0.44b

1.60 \(\pm \) 0.14a

8.67 \(\pm \) 0.45c

260.42 \(\pm \) 23.64c

1.42 \(\pm \) 0.07c

NP

6.02 \(\pm \) 0.48b

1.51 \(\pm \) 0.21a

7.37 \(\pm \) 0.26d

249.73 \(\pm \) 24.65c

1.23 \(\pm \) 0.04d

HP

6.03 \(\pm \) 0.65b

1.48 \(\pm \) 0.24a

8.32 \(\pm \) 0.19c

243.51 \(\pm \) 23.21c

1.38 \(\pm \) 0.03c

Female

Gastrocnemius

NC

3.48 \(\pm \) 0.21a,c

0.72 \(\pm \) 0.04a

–

206.01 \(\pm \) 12.54a

–

MC

3.72 \(\pm \) 0.43a

1.21 \(\pm \) 0.19b

–

335.33 \(\pm \) 27.82b

–

LP

3.15 \(\pm \) 0.32c,d

0.78 \(\pm \) 0.10a

–

248.33 \(\pm \) 26.22c

–

NP

3.04 \(\pm 0.16\) b,d

0.81 \(\pm \) 0.07a

–

264.17 \(\pm \) 25.54c

–

HP

3.15 \(\pm \) 0.19c,d

0.78 \(\pm \) 0.06a

–

249.22 \(\pm \) 18.80c

–

  1. NC normal control group, MC model control group, LP low energy low protein group, NP low energy normal protein group, HP low energy high protein group. Values are the mean ± SD.
  2. Mean values of the same muscle type and the same sex within a column with different superscript letters (a, b, c, d) were significantly different (P < 0.05). Female rats had too few gastrocnemius muscles, so fat determination was not possible.
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