The Sartorius is a two joint muscle and so is weak when the knee is flexed and the hip is flexed at the same time. It works better during single movements.
Origin : Area between the ASIS (Anterior Superior Iliac Spine) and AIIS (Anterior Inferior Iliac Spine).
Insertion : Anterior part of the medial condyle of the tibia.
Actions : Flexion of the hip.
Flexion of the knee.
External rotation of the hip as it flexes the hip and knee.
Innervation : Femoral nerve.
Daily uses : Sitting in a cross-legged position.
Example strengthening exercises : Standing hip flexion using resistance band.
Isometric hip flexion.
Example stretches : Hip flexor stretch.
Laying quadricep stretch.
Standing quadricep stretch.