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Table 1 Triceps Surae muscle volumes, force and specific force in young and older cohort

From: Age-associated differences in triceps surae muscle composition and strength – an MRI-based cross-sectional comparison of contractile, adipose and connective tissue

  Young (n = 5) Older (n = 5) p value Effect size r
GM Vol (cm3) 157.3 ± 32.2 121.2 ± 21.3 0.070 0.67
GL Vol (cm3) 74.6 ± 14.4 66.0 ± 9.1 0.293 0.37
SOL Vol (cm3) 307.8 ± 19.4 265.4 ± 47.2 0.119 0.55
TS Vol (cm3) 539.6 ± 63.9 452.6 ± 67.9 0.070 0.59
GM PCSA (cm2) 26.4 ± 5.0 31.9 ± 6.7 0.180 0.42
GL PCSA (cm2) 15.4 ± 2.2 17.0 ± 6.9 0.641 0.15
SOL PCSA (cm2) 57.4 ± 20.6 62.3 ± 17.7 0.702 0.13
TS PCSA (cm2) 106.0 ± 15.4 122.2 ± 32.1 0.451 0.31
Tendon Force (N) 1 426.3 ± 595.1 964.6 ± 319.3 0.165 0.48
Spec Force 1 (N/cm2) 14.74 ± 6.71 9.61 ± 5.35 0.218 0.39
Spec Force 2 (N/cm2) 17.88 ± 7.85 13.27 ± 7.56 0.372 0.29
  1. GM: Gastrocnemius Medialis, GL: Gastrocnemius Lateralis, SOL: Soleus muscle, TS: Triceps Surae, PCSA: Physiological cross-sectional area. Spec Force 1: Specific Force as the fraction of force and PCSA as calculated from the total Triceps Surae volume. Spec Force 2: Specific Force as the fraction of force and PCSA as calculated from Triceps Surae volume after subtraction of intramuscular fat and connective tissues. Data are presented as means ± SD.