Hip joint의 muscles

1. Flexors

1) Primary Flexors : Iliopsoas, Recus femoris, Tensor fasciae latae, Sartorius, Adductor longus, Pectineus 

2) Secondary Flexors : Addcutor brevis, Gracilis, Gluteus minimus

2. Extensors : Gluteus maximus, Hamstrings, Adductor magnus(posterior part)

3. Adductors

1) Primary Adductors : Adductor magnus & longus & brevis, Pectineus, Gracilis

2) Secondary Adductors : Biceps femoris, Gluteus maximus, Quadratus femoris, Obturator externus

4. Abductors

1) Primary Abductors : Gluteus medius & minimus, Tensor fasciae latae 

2) Secondary Abductors : Piriformis, Sartorius, Rectus femoris

5. External Rotators

1) Primary External Rotators : Gluteus maximus, Obturator internus, Piriformis Gemellus superior & inferior, Quadratus femoris

2) Secondray External Rotators : Gluteus medius & minimius, Obturator externus, Sartorius, Biceps femoris(long head)

6. Internal Rotators : Gluteus medius(Anterior fibers), Gluteus minimus(Anterior fibers), Tensor fasciae latae, Adductor magnus(posterior head), Adductor longus & brevis, Pectineus