Thigh

sartorius

sar-TO-ree-us

The sartorius is the longest muscle in the body, spiraling from hip to inner knee, forming a 'tailor's muscle' for crossing legs. It flexes, abducts, and rotates the hip plus flexes the knee, key for soccer kicks and agility drills. Balances quad-dominant training.

Open in 3D Viewer

Common Pain & Injury

Medial knee and anterior thigh pain during twisting or stairs. Strains common in sports. See doc for instability or swelling.

Anatomy & Function

Origin

Anterior superior iliac spine (front top of hip bone)

Insertion

Medial surface of proximal tibia (inner shin bone upper)

Actions

Hip flexion (knee up)
Hip abduction (leg out)
Lateral rotation of hip (turn out)
Knee flexion

Innervation

Femoral nerve (L2-L3)

Muscle Relationships

Antagonists

AdductorsHamstrings

Synergists

IliopsoasRectus femoris

Trigger Points

Mid-thigh; refers to anterior thigh and medial knee.

Stretches

1Figure-four stretch

2Cossack squat stretch

3Hip abduction stretch

Common Conditions

Sartorius strainPes anserine bursitisIliotibial band syndrome

Anatomical Parts

Right sartoriusLeft sartorius

FAQ

What is sartorius muscle?

Longest muscle; flexes/abducts/rotates hip and flexes knee for agile movements.

Sartorius pain knee?

Refers to inner knee; common in runners-strengthen glutes.

Sartorius stretch?

Figure-four or deep squat stretches it fully.

Sartorius function fitness?

Powers kicks and lateral moves in sports.

Also Works sartorius

10

Alternate Leg Diagonal Bound position 1

Alternate Leg Diagonal Bound position 2

Alternate Leg Diagonal Bound

Atlas Stones position 1

Atlas Stones position 2

Atlas Stones

Box Jump (Multiple Response) position 1

Box Jump (Multiple Response) position 2

Box Jump (Multiple Response)

beginner·other

Box Skip position 1

Box Skip position 2

Box Skip

beginner·other

Box Squat position 1

Box Squat position 2

Box Squat

intermediate·barbell

Box Squat with Bands position 1

Box Squat with Bands position 2

Box Squat with Bands

expert·barbell

Box Squat with Chains position 1

Box Squat with Chains position 2

Box Squat with Chains

expert·barbell

Chair Leg Extended Stretch position 1

Chair Leg Extended Stretch position 2

Chair Leg Extended Stretch

beginner·other

Crossover Reverse Lunge position 1

Crossover Reverse Lunge position 2

Crossover Reverse Lunge

Dancer's Stretch position 1

Dancer's Stretch position 2

Dancer's Stretch

Related Thigh Muscles

The biceps femoris is the lateral hamstring on the back of the thigh, with long and short heads forming a thick band from hip to knee. It flexes the knee, extends the hip, and rotates the leg outward, vital for running, jumping, and deadlifts. Key for posterior chain power and injury prevention.

Long, thin medial thigh muscle adducting and flexing knee. Aids cutting movements in soccer, stabilizing in squats.

iliotibial tract

The iliotibial tract (IT band) is a thick fibrous band down the outer thigh from hip to knee, stabilizing the leg during running and single-leg stands. Tight ITB causes knee pain in runners; mobility work prevents issues.

The rectus femoris is the central quad muscle crossing both hip and knee, visible as the teardrop above your knee. It flexes the hip and extends the knee, powering sprints, jumps, and squats. Balanced development prevents knee pain in athletes.

semimembranosus

The semimembranosus is a posterior thigh hamstring forming the teardrop at knee back, flexing knee and extending hip. Powers deadlifts, lunges, and deceleration in sports. Prevents ACL strains by stabilizing.

Semitendinosus is the slender medial hamstring with a long tendon, flexing knee and extending hip. Aids in medial knee stability for cutting sports. Complements semimembranosus for balanced posterior chain.

vastus intermedius

Deep central quad muscle under rectus femoris, extends knee powerfully. Core quad for squats and jumps.

vastus lateralis

Largest quad on outer thigh, massive knee extender for lateral stability in lunges and sprints.

Thigh Pain Guide

Common causes and relief

Activities & Sports

See which activities use sartorius