text: inferior to the patellar tendon’s inferior insertion. Patellar 
  tendon CSA was measured in each contiguous image along 
  the length of the tendon (i.e., from the ﬁrst image where the 
  patella was no longer visible to the ﬁnal image before the tib- 
  ial insertion). The axial images of the patellar tendon were 
  viewed in grayscale, sharpened, and the perimeter manually 
  outlined. The average of all measured axial patellar tendon 
  CSAs was calculated to produce a mean tendon CSA (mm2) 
  for each leg. The moment arm length of the patellar tendon 
  for each leg was estimated from sagittal plane images as the 
  perpendicular distance from the patellar tendon to the mid- 
  point of tibiofemoral contact (17). 
  tibialis anterior, extensor digitorum longus, and extensor hal- 
  lucis longus. The lateral shank compartment included the 
  peroneus longus and brevis. The deep posterior compartment 
  consisted of plantaris, tibialis posterior, ﬂexor digitorum lon- 
  gus, and ﬂexor hallucis longus. All muscles were manually 
  segmented in every other image (i.e., every 20 mm) starting 
  from the most proximal image in which the muscle appeared, 
  except the tensor fasciae latae, gluteus medius and minimus 
  (combined), and popliteus, which were manually segmented 
  in every slice (i.e., every 10 mm) due to their short length. The 
  volume of each individual muscle (Vm) was calculated using 
  previously outlined methods (16) as follows: 