The piriformis is a small, deep muscle in the buttock that runs from the sacrum (the triangular bone at the base of the spine) to the top of the femur. When it is tight or irritated, it produces a characteristic deep aching pain in the buttock that can extend down the back of the thigh. Because the sciatic nerve passes either through or directly beneath the piriformis in most people, piriformis tightness can also compress the sciatic nerve and produce symptoms that feel remarkably similar to disc-related sciatica.
Stretching the piriformis is one of the most effective interventions for both piriformis tightness and piriformis syndrome, but the stretches must be performed correctly and with an understanding of what is actually causing the symptoms. This guide covers the complete piriformis stretching toolkit, the important clinical distinctions that determine which approach is most appropriate, and what to do when stretching alone is not enough.
What the Piriformis Does
The piriformis is one of the deep external hip rotators, a group of six small muscles that externally rotate the femur in the hip socket. Its specific functions:
Hip external rotation: The primary function. The piriformis rotates the femur outward when the hip is extended (standing position).
Hip abduction: When the hip is flexed beyond approximately 60 degrees, the piriformis changes its line of pull and becomes a hip abductor rather than an external rotator. This means the piriformis is loaded differently during sitting than during standing.
Sacroiliac joint stabilisation: The piriformis contributes to the stability of the sacroiliac joint by connecting the sacrum to the femur, providing a muscular stabilisation component to this joint.
Why the Piriformis Gets Tight
Prolonged sitting: In the seated position with the hip flexed, the piriformis is shortened and held in a relatively inactive position for extended periods. This sustained shortened position contributes to the adaptive shortening that produces tightness.
Overuse in running: The piriformis is active during the stance phase of running to control the degree of femoral internal rotation. In runners with insufficient gluteus medius strength, the piriformis often compensates by working harder, leading to overuse-related tightness.
Sudden increase in activity: Dramatically increasing running mileage or sport-specific demands without adequate preparation can overload the piriformis and produce reactive tightness.
Direct trauma: A fall or impact to the buttock can produce piriformis muscle spasm and tightness.
Anatomical variation: In approximately 15 to 20 percent of people, the sciatic nerve passes through the piriformis muscle rather than beneath it. These individuals are more susceptible to piriformis-related sciatic symptoms.
Piriformis Tightness Versus Piriformis Syndrome
This distinction is important for determining the appropriate treatment approach.
Piriformis tightness: Muscle shortening that produces local buttock pain and stiffness. The pain is felt as a deep ache in the buttock. It may refer into the hip or upper thigh but does not typically produce the electrical, shooting, or burning sensation associated with nerve compression. Stretching, mobility work, and strengthening typically resolve this effectively.
Piriformis syndrome: A condition where the piriformis muscle compresses or irritates the sciatic nerve, producing sciatic symptoms (pain, numbness, tingling, or weakness) that extend down the back of the thigh, calf, or into the foot. The symptoms may be reproduced by sitting for extended periods or by direct pressure on the buttock.
How to distinguish them:
- Pure piriformis tightness produces local buttock pain that may refer into the upper thigh
- Piriformis syndrome produces sciatic symptoms (shooting, burning, or electrical sensations) that extend well below the knee
- If symptoms include weakness in the leg, foot drop, or bladder or bowel changes, medical assessment is required immediately regardless of suspected cause
When to seek medical assessment: If sciatic symptoms are severe, progressive, or accompanied by neurological signs (weakness, loss of sensation, bowel or bladder changes), a medical assessment to rule out disc pathology and other causes of sciatica is essential before pursuing piriformis stretching as the primary treatment.
The Best Piriformis Stretches
Supine Stretches (Lying on the Back)
Figure Four Stretch (Supine Piriformis Stretch)
Why it is the most effective piriformis stretch: The figure four position places the hip in the specific combination of flexion, abduction, and external rotation that produces a direct stretch on the piriformis. It is comfortable for most people, easy to control the intensity, and can be performed in bed or on the floor.
How to do it:
- Lie on the back with both knees bent, feet flat on the floor
- Cross the right ankle over the left knee, creating a figure four shape
- Flex the left hip by either pulling the left knee toward the chest with both hands or by raising the left foot off the floor
- Hold the stretch for 30 to 60 seconds
- Switch sides
Key cues:
- The stretch should be felt deep in the right buttock (the crossed leg side)
- If no stretch is felt, draw the bottom knee closer to the chest
- If the stretch is too intense, keep the bottom foot on the floor and only lean the legs slightly
Intensity progression:
- Figure four with foot on floor (least intense)
- Figure four with knee pulled toward chest
- Figure four with foot elevated on a wall (allows relaxation into the stretch without active effort)
Hold times: 30 to 60 seconds per side, 2 to 3 times per day for flexibility development.
Supine Cross-Body Stretch
What it develops: A broader hip external rotator stretch that includes the piriformis and the other deep external rotators.
How to do it:
- Lie on the back with one knee bent at 90 degrees
- Use the opposite hand to draw the bent knee across the body toward the floor on the opposite side
- Keep both shoulders flat on the floor
- Hold for 30 to 45 seconds per side
Key cue: The shoulder of the pulled-across side should remain on the floor. If it lifts, reduce the range of the cross-body pull.
Seated Stretches
Seated Figure Four Stretch
What it develops: Piriformis stretch in the seated position, directly relevant to reducing the tightness produced by prolonged sitting.
How to do it:
- Sit upright on a chair with good posture
- Cross one ankle over the opposite knee
- Sit tall and hinge slightly forward from the hips
- Hold for 30 to 60 seconds per side
Key cue: The forward hinge from the hips (not a rounded slouch) increases the stretch significantly. Think of bringing the chest toward the crossed shin rather than rounding the back.
This stretch can be performed at a desk: The seated figure four is one of the few piriformis stretches that can be performed discreetly at a desk during the working day, making it ideal for office workers who develop piriformis tightness from prolonged sitting.
Seated Hip External Rotation Stretch
How to do it:
- Sit on the floor with both legs extended
- Bend one knee and place the foot flat on the floor outside the opposite thigh
- Rotate the trunk toward the bent knee
- Use the opposite elbow against the outside of the bent knee to increase the rotation
- Hold for 30 to 45 seconds per side
Floor Stretches
Pigeon Pose
What it develops: A deep piriformis and hip external rotator stretch in a position that also opens the hip flexors of the back leg.
How to do it:
- Start on all fours
- Bring the right shin forward, angling it across the mat (the shin may be perpendicular to the mat or at a smaller angle depending on flexibility)
- Extend the left leg behind you with the top of the foot on the floor
- Lower the hips toward the floor
- Hold for 45 to 90 seconds per side
Intensity progressions:
- Supported pigeon (hands on the floor, hips elevated): least intense
- Resting pigeon (forearms on floor): moderate
- Sleeping pigeon (chest on floor, arms extended): most intense
Important note for gluteal tendinopathy: As discussed in the isometric hip exercises article on this site, the pigeon pose compresses the gluteal tendons between the greater trochanter and the overlying structures. Athletes with gluteal tendinopathy should avoid the pigeon pose during rehabilitation and substitute the supine figure four stretch instead.
90/90 Stretch
What it develops: A hip external rotation stretch for the front leg and hip internal rotation stretch for the back leg, making it the most comprehensive hip rotation mobility exercise available.
How to do it:
- Sit on the floor with both hips and knees at 90 degrees
- The front leg is externally rotated (shin perpendicular to the body)
- The back leg is internally rotated (shin parallel to the body, behind)
- Sit upright and feel the stretch in the outer hip of the front leg
- For a deeper stretch, hinge forward over the front shin
- Hold for 45 to 60 seconds per side
Key cue: The 90/90 is a more controllable position than pigeon pose for most people because the degree of external rotation can be adjusted by changing the shin angle.
Figure Four Hip Stretch (Lying Variation)
How to do it:
- Lie on one side
- Bring the top knee forward and toward the chest, then cross it in front of the bottom leg
- Hold the top knee with the bottom hand
- Hold for 30 to 45 seconds per side
Standing Stretches
Standing Figure Four (Standing Pigeon)
What it develops: Piriformis stretch in a standing position, appropriate when floor stretches are impractical or when a briefer stretch is needed during activity.
How to do it:
- Stand beside a wall or hold a support for balance
- Cross one ankle over the opposite knee
- Bend the standing knee to lower the hips
- Hinge slightly forward at the hips
- Hold for 30 to 45 seconds per side
Key cue: The depth of the squat on the standing leg determines the intensity of the stretch. A deeper squat produces a more intense stretch.
Standing Hip External Rotation Stretch (Against Wall)
How to do it:
- Stand facing a wall
- Raise one knee and place the shin on a ledge, barre, or the edge of a table at approximately hip height (hip flexed and externally rotated)
- Hinge forward slightly at the hips
- Hold for 30 to 45 seconds per side
Nerve Flossing for Piriformis Syndrome
When sciatic symptoms are present (pain, tingling, or numbness extending below the knee), nerve flossing can help reduce nerve sensitisation alongside piriformis stretching.
What nerve flossing is: Nerve flossing (also called neural mobilisation) involves moving the sciatic nerve through its full length by alternately tensioning and releasing it. This helps reduce nerve adhesions, improve nerve mobility, and decrease the sensitivity of a sensitised nerve.
Sciatic nerve floss:
- Sit on the edge of a chair with good posture
- Extend one knee (straightening the leg) while simultaneously flexing the neck (looking down)
- Return to the starting position (bend the knee and raise the head)
- Perform 10 to 15 slow, controlled repetitions per side
- The movement should produce a pulling sensation but not sharp or electric pain
Important: If nerve flossing significantly increases or reproduces sciatic symptoms, stop and consult a physiotherapist. Nerve flossing is appropriate for mildly sensitised nerves but not for acutely irritated nerve conditions.
What to Do When Stretching Alone Is Not Enough
Piriformis stretching provides symptomatic relief but does not address the underlying causes of tightness in most athletes. The following additional interventions address the root causes:
Strengthen the gluteus medius and minimus: As covered in the gluteus medius strengthening exercises and glute minimus exercises articles on this site, insufficient hip abductor and stabiliser strength causes the piriformis to compensate during single-leg activities. Strengthening the glutes reduces the compensatory overload on the piriformis.
Foam rolling the piriformis: Self-myofascial release of the piriformis can reduce muscle tension before stretching and improve the effectiveness of the subsequent stretch. Sit on a foam roller with one ankle crossed over the opposite knee (the figure four position), roll slowly over the outer buttock, and pause on tender areas for 20 to 30 seconds.
Address hip mobility restrictions: The piriformis may tighten in response to restricted hip internal rotation mobility, as it works harder to control the degree of femoral rotation. Improving hip internal rotation mobility through 90/90 stretches and hip internal rotation exercises reduces the compensatory demand on the piriformis.
Modify training load: If piriformis tightness is related to a sudden mileage increase or training intensification, temporarily reducing the load while implementing the strengthening and stretching programme allows the tissue to recover while the underlying weakness is addressed.
Assess and address sitting posture: For office workers, ensuring the hip is not held in a significantly externally rotated position during prolonged sitting (common when sitting with legs crossed or feet turned out) reduces the sustained shortened position that contributes to piriformis tightness.
A Complete Piriformis Stretching Routine
Daily routine (10 minutes):
Morning (5 minutes):
- Supine figure four stretch: 60 seconds per side
- 90/90 stretch: 45 seconds per side
- Supine cross-body stretch: 30 seconds per side
Evening (5 minutes):
- Pigeon pose or seated figure four: 60 to 90 seconds per side
- Figure four with foot on wall: 60 seconds per side
Pre and post-training:
- Standing figure four before training: 30 seconds per side
- Supine figure four after training: 60 seconds per side
Sport-Specific Piriformis Applications
Runners: The piriformis is frequently overloaded in runners with insufficient gluteus medius strength. Piriformis stretching should be paired with the gluteus medius strengthening programme on this site. Stretching the piriformis without addressing the underlying glute weakness produces temporary relief that does not last.
Cyclists: The seated position in cycling holds the piriformis in the abduction position (above 60 degrees of hip flexion) for extended periods, contributing to piriformis tightness. The seated figure four stretch is the most practical stretch for cyclists as it can be performed in normal clothing.
Strength athletes (squatters and deadlifters): The piriformis is loaded eccentrically during the deep squat descent, controlling femoral internal rotation. Athletes who squat with significant external toe rotation place greater sustained demand on the piriformis, which can contribute to tightness over time.
Sedentary workers: The most important piriformis population. Daily seated figure four stretches performed at the desk 2 to 3 times during the working day significantly reduce the cumulative tightening effect of prolonged sitting.
Frequently Asked Questions
How long does it take for piriformis stretching to work?
For simple piriformis tightness without nerve involvement, consistent twice-daily stretching typically produces noticeable symptom relief within 1 to 2 weeks. Full resolution of tightness combined with the strengthening work described above typically takes 4 to 8 weeks. If symptoms have not improved meaningfully within 2 to 3 weeks of consistent stretching, a physiotherapy assessment is warranted to confirm the diagnosis and refine the approach.
Should I stretch a piriformis that is in spasm?
Acute piriformis spasm (severe, sudden-onset buttock pain) responds better to gentle movement, heat, and rest initially rather than aggressive stretching. Attempting to forcefully stretch a muscle in spasm can increase the protective contraction. Begin with very gentle range of motion, heat application, and isometric contractions before introducing sustained stretching once the acute spasm has reduced.
Is piriformis tightness related to lower back pain?
Yes, in several ways. The piriformis connects to the sacrum, and tightness can create tension at the sacroiliac joint. Additionally, piriformis-related sciatic symptoms can be mistaken for disc-related lower back pain, and the two conditions sometimes coexist. Stretching the piriformis can relieve sciatic symptoms that are being generated by piriformis compression of the sciatic nerve rather than disc pathology.
Can sitting with a wallet in the back pocket cause piriformis syndrome?
Yes. This is sometimes called wallet neuritis or hip-pocket syndrome. Sitting on a thick wallet creates direct pressure on the piriformis and sciatic nerve over time. Removing the wallet from the back pocket is a simple intervention for people with buttock and sciatic symptoms who habitually sit with a wallet in the back pocket.
How do I know if my piriformis is tight or if I have sciatica from a disc?
Disc-related sciatica typically produces pain that starts in the lower back and radiates down the leg, is worsened by sitting, and may be accompanied by lower back pain. Piriformis syndrome typically produces pain that starts in the buttock (not the lower back) and may radiate down the back of the thigh. A useful test: does bending forward from standing (lumbar flexion) worsen the pain? If yes, disc involvement is more likely. If the pain is reproduced more by direct pressure on the buttock or by the figure four stretch position, piriformis involvement is more likely. A physiotherapist or doctor can perform specific clinical tests to distinguish between the two.