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Table 2 Descriptive data on muscle thickness (MT), knee extension torque (KETQ), estimated lean tissue mass (LTM), time for sit-to-stand test (STS-T), and sit-to-stand power (STS-P)

From: Age-related change in sit-to-stand power in Japanese women aged 50 years or older

  Age group
Variables G50-54 n = 32 G55-59 n = 56 G60-64 n = 112 G65-69 n = 151 G70-74 n = 126 G75-79 n = 57 G80+ n = 22
MT, cm
Thigh anterior 4.4 (0.6) 4.3 (0.6) 4.1 (0.6) 3.8 (0.5) 3.7 (0.5) 3.4 (0.4) 3.0 (0.5)
Thigh posterior 5.7 (0.5) 5.7 (0.7) 5.8 (0.7) 5.7 (0.7) 5.5 (0.8) 5.5 (0.7) 4.9 (0.8)
Lower leg anterior 2.6 (0.2) 2.6 (0.3) 2.7 (0..2) 2.6 (0.3) 2.5 (0.3) 2.5 (0.2) 2.3 (0.3)
Lower leg posterior 6.0 (0.4) 6.0 (0.5) 6.0 (0.5) 6.0 (0.5) 5.9 (0.4) 5.9 (0.5) 5.4 (0.5)
LTM, kg 6.7 (0.8) 6.7 (1.0) 6.4 (0.8) 6.2 (0.8) 5.9 (0.8) 5.6 (0.8) 4.8 (0.8)
KETQ, Nm 90.5 (17.9) 84.4 (20.0) 77.1 (22.5) 70.9 (20.0) 66.5 (18.3) 57.4 (17.7) 47.0 (14.2)
STS-T, s 9.8 (2.0) 10.4 (2.0) 11.8 (3.2) 12.2 (3.6) 13.9 (5.1) 16.6 (6.1) 24.0 (9.4)
STS-P, W 159.8 (33.8) 157.3 (35.3) 131.7 (33.1) 124.4 (32.8) 111.9 (35.6) 89.0 (35.1) 59.2 (25.1)
  1. Values are means (SDs).