Table 2.

Sites of muscle measurement using ultrasonography

Muscle	Measurement site
RF	lower one-third of the line connecting the anterior superior iliac spine and the upper edge of the patella
VL	lower fifth of the line connecting the greater trochanter of the femur and the medial condyle of the femur
VM	lower one-third of the line connecting the greater trochanter of the femur and the lateral condyle of the femur
BFL	the lower third of the line connecting the ischial tuberosity and the lateral popliteal fossa
ST	the lower third of the line connecting the ischial tuberosity and the medial popliteal fossa

RF Rectus Femoris, VM Vastus Medialis, VL Vastus Lateralis, BFL Biceps Femoris long head, ST Semitendinosus