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Table 5 Contractile part and connective tissue volume for each muscle in young and old group

From: Muscles adaptation to aging and training: architectural changes – a randomised trial

Volume (cm3) Young Old
Contractile part Fat and connective tissue % fat / total contractile volume Contractile part Fat and connective tissue % fat / total contractile volume
VL 1521.1 ± 272.5 57.9 ± 27.9 3.60% 1195.2 ± 178.7 ** 56.5 ± 26.5 4.51%
VI 1099.6 ± 210.2 44.8 ± 25.1 3.86% 969.1 ± 230.2 44.5 ± 19.8 4.39%
VM 1078.4 ± 215.1 42.1 ± 20.9 3.70% 841.9 ± 147.9 ** 39.4 ± 17.6 4.47%
RF 564.6 ± 113.0 21.6 ± 9.4 3.64% 420.4 ± 71.4 *** 67.5 ± 50.9 * 14.86%
Total Quad 4263.8 ± 770.2 166.5 ± 82.5 3.70% 3426.6 ± 598.6 ** 177.2 ± 71.7 4.92%
MG 488.9 ± 101.6 17.7 ± 9.4 3.44% 414.5 ± 78.8 * 39.3 ± 32.1 * 8.66%
LG 271.1 ± 33.7 9.5 ± 5.1 3.31% 224.3 ± 29.2 *** 17.2 ± 7.1 ** 7.14%
Sol 927.5 ± 90.1 31.5 ± 15.5 3.21% 768.4 ± 97.6 *** 58.9 ± 24.1 ** 7.12%
Total TS 1687.6 ± 192.6 58.7 ± 29.8 3.29% 1407.3 ± 163.9 *** 115.4 ± 56.2 ** 7.58% #
  1. *Significant difference between young and old (p < 0.05), ** (p < 0.01) and *** (p < 0.001)
  2. # Significant difference between Quadriceps and Triceps Surae (TS) muscles group (p < 0.05). Data are presented as means ± SD