Fig 1.
Example of MRI slice mid-thigh with the knee extensors and flexors manually segmented.
Table 1.
Sex differences in ACSAmax of individual muscles and whole KF and KE muscle groups as well as the KF:KE ratio.
Data presented as mean ± SD (range).
Fig 2.
The magnitude of the sex difference for individual KE (dark grey) and KF (light grey) muscles.
Data are presented as mean female ACSAmax (n = 34) as the percentage less than mean male ACSAmax (n = 32). The sex difference ranged from 16.1% for the VL to 43.6% for the SA.
Fig 3.
Knee flexors (KF) to knee extensor (KE) ACSAmax ratio for individual participants (diamonds) and mean for males (n = 32, dark grey bar) and females (n = 34 light grey bar).
* P<0.05.
Fig 4.
Proportional size of individual muscles relative to whole muscle group size (ACSAmax %knee extensor (A) %knee flexor (B) ACSAmax).
Data are mean±SD of males (n = 32) and females (n = 34). * P<0.05.
Fig 5.
Muscle mass distribution of males (n = 32 black line) and females (n = 34 dark grey line).
Mean normalised ACSA (%ACSAmax) of the individual knee extensors (A) and knee flexors (B) along the length of the femur (distal: 0% to proximal:100%). Areas of significant sex differences are shown by light grey shading (P<0.05).