Sartorius

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
  
  
• Abducts the hip

Innervation

• Femoral nerve

Daily uses

• Sitting in a cross-legged position

Example strengthening exercises

• Standing hip flexion using resistance band
  
  
• Sitting hip flexion using resistance band

Example stretches

• Hip flexor stretch
  
  
• Laying quadricep stretch
  
  
• Standing quadricep stretch

Related muscles

• Rectus femoris
  
  
• Gracilis