Table 5 Medial gastrocnemius muscle morphology & mechanics.

From: Alterations in skeletal muscle morphology and mechanics in juvenile male Sprague Dawley rats exposed to a high-fat high-sucrose diet

Medial gastrocnemius

Units

CHOW

HFS

Effect size

Significance

Mean ± SD

Mean ± SD

Cohen's d

p-value

Mass

g

1.98 ± 0.17

1.91 ± 0.21

0.37

p = 0.448

Volume

mm3

1798 ± 197

1864 ± 163

0.37

p = 0.448

PCSA

mm2

66.75 ± 9.05

71.14 ± 5.08

0.60

p = 0.211

Contractile PCSA

mm2

62.11 ± 8.76

63.35 ± 5.81

0.17

p = 0.722

Collagen content

%

7.00 ± 1.84

11.04 ± 2.91

1.66

p = 0.004

Lipid content

%

0.84 ± 0.20

0.89 ± 0.25

0.22

p = 0.658

Absolute force

N

14.60 ± 1.76

13.93 ± 2.43

0.32

p = 0.524

Muscle stress

N/mm2

0.22 ± 0.06

0.20 ± 0.03

0.42

p = 0.286

Muscle quality

N/g

7.73 ± 1.16

7.06 ± 1.13

0.59

p = 0.233

Relative force

N/kg

24.34 ± 3.55

19.92 ± 3.64

1.23

p = 0.020

  1. Data represents medial gastrocnemius (MG) muscle morphology and mechanics in an in-situ muscle preparation. PCSA—physiological cross-sectional area. Contractile PCSA—PCSA minus collagen content. Absolute Force- maximal isometric force. Muscle Quality—maximal force normalized to MG mass. Muscle Stress—maximal force normalized to physiological cross-sectional area (PCSA). Relative Force—maximal force normalized to body mass. Bold- indicates a statistically significant difference (p < 0.05).
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