Section 01 of 20
Introduction
Gracilis is a long, thin, strap-like muscle on the most medial part of the thigh. It is the only adductor that crosses the knee joint, which gives it roles at both the hip and the knee.
Its tendon passes behind the medial femoral condyle and joins the tendons of sartorius and semitendinosus on the upper medial tibia, forming the pes anserine (goose-foot) insertion.
Section 02 of 20
Origin
| Origin | Inferior half of the body of the pubis and the inferior pubic ramus, next to the pubic symphysis. |
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An anatomical image for this section will be added when verified source media becomes available.
Section 03 of 20
Insertion
| Insertion | Upper medial surface of the tibia (the pes anserine), together with the tendons of sartorius and semitendinosus. |
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An anatomical image for this section will be added when verified source media becomes available.
Section 04 of 20
Actions
No dedicated action video is currently available. This movement is explained below and video will be added when verified source media becomes available.
| Primary action | Hip adduction. |
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| Secondary actions | Knee flexion, medial rotation of the flexed leg, and weak hip flexion. |
| Movement at the joint | Hip joint (adduction, weak flexion) and knee joint (flexion, medial rotation). |
| Heads / fiber groups | Single long, thin muscle belly; no separate heads. |
| Functional examples | Walking and running; kicking; changing direction; steadying the inner knee; horseback riding. |
Hip adduction
Draws the thigh toward the midline, especially when the knee is extended.
Knee flexion
Flexes the knee because the muscle crosses behind the knee axis.
Medial rotation of the flexed leg
Helps rotate the tibia inward when the knee is bent, and assists hip flexion.
Section 05 of 20
Nerve Innervation
| Nerve | Anterior division of the obturator nerve, roots L2–L3 (some sources list L2–L4). |
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Gracilis is the adductor most often used as a graft or flap in surgery, so scars along the inner thigh may be found in some clients. Inner-thigh numbness or weak adduction may reflect obturator nerve problems, not only muscle tightness.
Section 06 of 20
Blood Supply
| Blood | Medial circumflex femoral artery and branches of the profunda femoris and femoral arteries. |
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Section 07 of 20
Pictures and Visual Anatomy
An anatomical image for this section will be added when verified source media becomes available.
Section 08 of 20
Functional Movement
Gracilis is active in walking, running, kicking, changing direction, horseback riding, and any movement that pulls the legs together or steadies the inner knee. It helps control the knee as it bends and turns.
Section 09 of 20
Synergists and Antagonists
Synergists: adductor longus, brevis, and magnus and pectineus (adduction); sartorius and semitendinosus (knee flexion and medial rotation of the flexed leg). Antagonists: gluteus medius, gluteus minimus, and tensor fasciae latae (abduction); the quadriceps (knee extension).
Section 10 of 20
Palpation and Location
Client position and technique
Position the client supine with the hip slightly abducted and externally rotated (a relaxed frog-leg position) or side-lying with the treated leg on top. Ask for gentle adduction against light resistance. The thin belly lies on the inner thigh behind adductor longus, and its tendon can be followed toward the inner knee just behind sartorius.
Protect nearby structures
Groin work is sensitive: obtain explicit consent, drape securely, and stay below the inguinal crease and away from the genitals. Avoid the femoral triangle and the great saphenous vein along the inner thigh and knee, and use light pressure over the pes anserine area near the knee.
Section 11 of 20
Massage Therapy Relevance
Gracilis is often involved in inner-thigh and groin tension in runners, dancers, and people who sit with the legs crossed. Because its tendon reaches the inner knee, it can also be a source of medial knee discomfort.
Section 12 of 20
Dysfunction: What Happens When Movement Goes Wrong
Changes in how a muscle works can change how a joint moves. The points below describe possibilities that may be associated with altered muscle function; they are not diagnoses, and one muscle is never assumed to be the sole cause of a problem.
When the muscle is weak
Weakness may reduce adduction control and inner-knee stability and may shift load to the other adductors and the pes anserine tendons.
When it is tight or shortened
Tightness may be associated with limited hip abduction and knee extension and with inner-thigh and inner-knee ache.
When it is overused
Repetitive running, kicking, and direction changes may overload the muscle and its tendon and may contribute to groin or inner-knee pain.
When it is strained
A strain may cause inner-thigh or groin pain with adduction; groin pain also has hip, hernia, and pubic bone causes.
When it is inhibited or others compensate
Reduced activation may be associated with less pelvic and knee control and more work by the other adductors and the hip flexors.
When it does not coordinate well with synergists and antagonists
Poor coordination with the other adductors, the abductors, and the hamstrings may alter pelvic control and knee position and may be associated with groin or pes anserine symptoms.
Section 13 of 20
Conditions, Pathologies, and Pain Relationships
Adductor or groin strain
Sprinting, kicking, and forceful direction changes can strain the proximal tendon near the pubis. Acute pain, bruising, or swelling needs assessment, not deep work.
Pes anserine pain syndrome
Pain and tenderness on the upper inner tibia below the knee may involve the pes anserine tendons or bursa (gracilis, sartorius, and semitendinosus) and is common in runners and in people with knee osteoarthritis.
Osteitis pubis and groin pain
Pubic bone and groin pain with activity can overlap with adductor problems and needs assessment.
Differential considerations
Hip joint problems, inguinal hernia, medial meniscus or ligament injury, saphenous nerve irritation, and lumbar referral can all cause inner thigh or knee pain.
Section 14 of 20
Example Clinical Relationship
A distance runner reports tenderness on the inner side of the upper tibia just below the knee, especially on stairs. The pes anserine tendons, including gracilis, may be involved, and the pattern may be associated with pes anserine pain syndrome, but the medial meniscus, knee arthritis, and nerve irritation can look similar. Gentle work along the inner thigh may support comfort, while knee swelling, locking, or pain after trauma needs referral.
Section 15 of 20
Massage and Treatment Approaches
For healthy, non-acute tissue, use secure draping and begin with light effleurage on the medial thigh. Progress to gentle kneading and longitudinal strokes along the muscle toward the knee, keeping pressure comfortable and away from the groin.
| Positioning | Supine with the hip abducted and supported, or side-lying with the treated leg on top and supported. |
|---|---|
| Regional work | Consider the other adductors, sartorius, hamstrings, and quadriceps when assessment supports it. |
| Avoid | Deep pressure at an acute injury, the femoral triangle, the groin, or a tender pes anserine area. |
Section 16 of 20
Precautions and Contraindications
Precautions and contraindications
- Acute strain, hematoma, or recent surgery in the groin or thigh.
- Suspected hernia or unexplained groin lump: do not massage locally.
- Use caution with varicose veins, anticoagulant use, or easy bruising.
- Always obtain consent and use secure draping for medial thigh work.
Section 17 of 20
Red Flags and When to Refer
Red flags and referral
- Groin bulge, testicular pain or swelling, or blood in the urine.
- Unilateral leg swelling, warmth, or calf pain, or sudden shortness of breath.
- Severe pain after trauma, a palpable defect, or inability to bear weight.
- Fever, night pain, or unexplained weight loss with groin or knee pain.
Section 18 of 20
Study Summary
Attachments
Origin: inferior pubis and pubic ramus. Insertion: upper medial tibia (pes anserine).
Actions
Hip adduction, knee flexion, and medial rotation of the flexed leg.
Supply
Anterior obturator nerve (L2–L3); medial circumflex femoral artery.
Section 19 of 20
Instructor Narration
Open narration transcript
Gracilis is the long, slender strap muscle on the inner thigh. It is the only adductor that crosses the knee.
It arises from the lower half of the pubic body and the inferior pubic ramus and inserts on the upper medial tibia, where its tendon joins sartorius and semitendinosus as the pes anserine.
It adducts the hip, flexes the knee, and helps rotate the bent leg inward. The other adductors and sartorius help it, and the hip abductors and quadriceps oppose it.
The anterior division of the obturator nerve supplies it, from L2 to L3, and the medial circumflex femoral artery provides its blood.
For palpation, place the client supine in a relaxed frog-leg position and ask for gentle adduction. Follow the thin belly toward the inner knee. Obtain consent, use secure draping, stay away from the groin, and be gentle over the pes anserine area.
Adductor strain, pes anserine pain, osteitis pubis, hip problems, hernia, and knee injuries can all overlap. Refer a groin bulge, testicular symptoms, unilateral leg swelling, severe pain after trauma, or fever with night pain.
Remember: inferior pubis to the pes anserine on the medial tibia, adduction and knee flexion, obturator nerve.
Section 20 of 20