The groin refers to the region of the inner thigh and hip where several muscles — primarily the hip adductors — originate or insert. Groin tightness is one of the most common flexibility complaints in athletes and is associated with reduced hip mobility in sport, chronic groin pain, and elevated risk of groin strain injuries.
Stretching the groin muscles is straightforward once the anatomy is understood — because different stretches target different adductor muscles, and knowing which muscle is tight guides the most effective stretch selection.
The Groin Muscles: What Is Being Stretched
The groin encompasses five primary hip adductor muscles:
Adductor longus: The most commonly strained adductor, originating from the pubic bone and inserting on the femur. The primary target of most standard groin stretches.
Adductor brevis: A shorter adductor beneath the adductor longus. Targeted by similar stretches to the longus.
Adductor magnus: The largest adductor, spanning most of the inner thigh from the pubic bone and ischium to the femur and the knee area. The posterior portion (near the knee) behaves mechanically like a hamstring. Full adductor magnus stretching requires both hip abduction and knee extension simultaneously.
Gracilis: A long, thin muscle running from the pubic bone to the medial tibia (inner shin bone). The only adductor that crosses the knee, which means knee position affects how much stretch it receives.
Pectineus: A short adductor near the hip crease, often involved in hip flexor tightness presentations.
The practical implication of this anatomy:
Most standard groin stretches (butterfly, standing groin stretch) primarily target the adductor longus and brevis. Fully stretching the adductor magnus requires specific stretches that combine hip abduction with knee extension. The gracilis requires knee extension for a complete stretch.
When NOT to Stretch the Groin
Acute groin strain:
A groin strain is a partial or complete tear of the adductor muscle fibres. The classic mechanism is a forceful adduction (bringing the legs together) or an explosive kicking or change of direction movement that overstretches the adductor.
Signs of acute groin strain:
- Sharp pain in the inner thigh during or immediately after a specific movement
- Localised tenderness to touch along the adductor muscle
- Pain with resisted adduction (pressing the legs together against resistance)
- Possible bruising in the inner thigh (in more significant strains)
Why not to stretch an acute groin strain:
An acutely strained adductor has structural damage to the muscle fibres. Stretching the damaged tissue in the acute phase (first 48 to 72 hours) can worsen the fibre damage and prolong recovery. The initial management of an acute groin strain is rest, ice, and gentle movement within pain-free range — not aggressive stretching.
When groin stretching is appropriate:
- Chronic adductor tightness without acute injury
- The subacute phase of groin strain recovery (from approximately 48 to 72 hours after injury, progressing carefully based on pain)
- Prevention and maintenance stretching in people with no current injury
If there is uncertainty about whether groin pain represents a strain or chronic tightness, physiotherapy assessment is the appropriate first step before aggressive stretching begins.
The Best Groin Stretches
Stretch 1: Butterfly Stretch (Seated Adductor Stretch)
The most widely used groin stretch, targeting the adductor longus and brevis through combined hip abduction and external rotation.
How to do it:
- Sit on the floor with the back straight
- Bring the soles of both feet together in front of the body
- Allow the knees to fall outward toward the floor
- Hold the feet with both hands
- The stretch is felt in the inner thigh as the knees drop toward the floor
- Hold for 30 to 60 seconds
Increasing the stretch:
- Move the feet closer to the body (heels toward the groin): increases the hip abduction and the adductor stretch
- Gently press the knees toward the floor with the elbows: adds a gentle overpressure that deepens the stretch
- Lean forward from the hips (maintaining a straight back): adds hip flexion alongside the abduction
What the butterfly specifically targets: Primarily the adductor longus and brevis through the combined abduction and external rotation position.
What it does not fully target: The adductor magnus (which requires a more extended knee) and the gracilis (which similarly needs more knee extension).
Sets: 3 holds of 45 to 60 seconds
Stretch 2: Standing Groin Stretch (Side Lunge Stretch)
A weight-bearing groin stretch that develops the functional flexibility most relevant to athletic hip mobility.
How to do it:
- Stand with feet significantly wider than shoulder-width (approximately 1.5 to 2 metres between feet)
- Keep both feet flat on the floor and toes pointing forward or very slightly outward
- Shift the bodyweight to one side by bending the knee on that side
- The opposite leg remains straight with the inner thigh feeling a stretch
- Hold for 20 to 30 seconds per side
Increasing the stretch:
- Widen the stance further
- Lower the hips closer to the floor on the bent-knee side
- Place hands on the bent knee for balance and gentle pressure
What this specifically targets: The adductor longus, brevis, and the lateral portion of the adductor magnus on the straight-leg side.
Why this is specifically valuable for athletes: The standing position and the single-sided stretch closely replicate the hip position during lateral cutting and change of direction movements. As covered in the footwork drills article on this site, these lateral movements specifically stress the adductors and the groin flexibility developed in this stretch directly transfers to sport performance.
Sets: 3 holds of 30 seconds per side
Stretch 3: Sumo Squat Stretch (Wide Stance Deep Squat)
A dynamic and active groin stretch that develops mobility alongside strength in the deep hip position.
How to do it:
- Stand with feet significantly wider than shoulder-width, toes pointing outward at approximately 45 degrees
- Lower into a deep squat position
- Place the elbows on the inner thighs just above the knees
- Gently press the elbows outward to push the knees apart
- Hold for 20 to 30 seconds, or pulse gently in and out of the deepest position
What this specifically targets: The adductor longus, brevis, and the pectineus through the wide stance deep flexion position. Also develops the hip external rotators alongside the adductors.
Note: This stretch requires adequate ankle dorsiflexion and hip flexion range in addition to adductor flexibility. As covered in the gastrocnemius and soleus stretches article on this site, insufficient ankle dorsiflexion often prevents the deep squat position. If the heels cannot stay flat in the sumo squat, elevate the heels on a small plate or book.
Sets: 3 holds of 30 seconds or 10 to 15 gentle pulses
Stretch 4: Lying Adductor Stretch (Supine Groin Stretch)
A relaxed, unloaded groin stretch appropriate for people who find standing or sitting stretches uncomfortable.
How to do it:
- Lie flat on the back with the knees bent and feet flat on the floor
- Allow both knees to fall outward toward the floor (like the butterfly position but lying down)
- The soles of the feet come together or the feet remain flat depending on comfort
- Gravity provides the stretch force in this position — no pushing or forcing needed
- Hold for 60 to 90 seconds
Increasing the stretch:
- Move the feet closer to the body (heels toward the buttocks)
- Allow the legs to remain in the position longer (gravity deepens the stretch progressively)
What this is specifically valuable for: People with acute or subacute adductor sensitivity where the unloaded supine position allows passive stretching with less risk of provoking the tissue than loaded standing stretches.
Sets: 2 to 3 holds of 60 to 90 seconds
Stretch 5: Long Adductor Stretch (Extended Leg Groin Stretch)
Specifically targets the adductor magnus and the gracilis, which the butterfly and standing groin stretches do not fully address.
How to do it:
- Sit on the floor with both legs extended straight in front
- Open the legs into a wide V position (straddle position) as wide as comfortable
- The inner thigh and the area near the groin should feel the stretch
- Maintain an upright or very slightly forward-tilted spine
- Hold for 30 to 60 seconds
Increasing the stretch:
- Gradually widen the legs over multiple sessions (never force the range)
- Lean forward from the hips with a straight back (increases the posterior adductor magnus stretch)
- Hold a slight forward lean rather than collapsing the back (spinal flexion reduces the adductor stretch and transfers the sensation to the hamstrings)
What this specifically targets: The adductor magnus (posterior portion) and the gracilis through the extended knee position.
The forward lean cue: Many people lean forward from the lower back (rounding the spine) rather than tilting from the hips (maintaining a straight back). Only the hip-tilted forward lean increases the adductor stretch; the rounded-back version primarily stretches the lumbar fascia and reduces the adductor stretch.
Sets: 3 holds of 45 to 60 seconds
Stretch 6: Standing Hip Adductor Stretch With Support
A gentle standing version appropriate for people with limited floor mobility or who are in the early subacute phase of recovery.
How to do it:
- Stand beside a wall or chair for support
- Place one hand on the support
- Step the inner foot of the far leg approximately 50 to 60 centimetres to the side
- Shift the weight to the far foot, allowing the near leg to straighten and feel the inner thigh stretch
- Hold for 30 seconds per side
What this is specifically appropriate for: Older adults, people in early groin strain recovery, and people who cannot comfortably perform floor stretches.
Sets: 3 holds of 30 seconds per side
Stretch 7: Dynamic Groin Stretch (Leg Swing Across Body)
As covered in the dynamic warm up exercises for running article on this site, leg swings in the frontal plane develop the hip adductor and abductor mobility dynamically, making this the most appropriate pre-exercise groin warm-up movement.
How to do it:
- Stand beside a wall with one hand on the wall for balance
- Swing the outer leg across the body in the frontal plane (side to side)
- Begin with small amplitude swings (30 degrees each way)
- Progressively increase the amplitude over 10 to 15 swings
- 10 to 15 swings per leg
When to use: Before exercise requiring hip abduction and adduction range (sprinting, cutting, kicking, martial arts). Not a replacement for static stretching but an appropriate warm-up movement before sport.
A Complete Groin Stretching Routine
Pre-exercise (dynamic only):
- Leg swings across body: 15 per leg
- Sumo squat position hold: 2 x 20 seconds
Post-exercise or dedicated flexibility session:
- Butterfly stretch: 3 x 60 seconds
- Standing side lunge stretch: 3 x 30 seconds per side
- Long adductor stretch (straddle): 3 x 45 seconds
- Lying adductor stretch: 2 x 90 seconds
Total time: 15 to 20 minutes
Programming Groin Stretches
For chronic groin tightness:
Daily stretching sessions of 15 to 20 minutes produce the most reliable improvements in adductor flexibility. Research on flexibility development consistently shows that daily stretching produces significantly greater improvements than 3-times-per-week stretching.
For athletic performance maintenance:
3 to 4 times per week as part of a post-training flexibility routine. As covered in the is stretching good for sore muscles article on this site, stretching after training when the muscles are warm produces better flexibility development than cold stretching.
For groin strain rehabilitation:
The timing and intensity of groin stretching in rehabilitation must be guided by the stage of recovery and the pain response. As a general principle:
- Acute phase (0 to 72 hours): Avoid aggressive stretching
- Subacute phase (72 hours to 2 weeks): Gentle pain-free range movement only
- Late rehabilitation (2 to 6 weeks): Progressive adductor strengthening alongside carefully graded stretching
Physiotherapy assessment should guide groin strain rehabilitation rather than self-directed stretching alone.
Frequently Asked Questions
Why does my groin feel tight but not painful?
Adductor tightness without pain is very common and typically reflects the lifestyle pattern of prolonged sitting (which places the adductors in a shortened position for extended periods) alongside insufficient mobility training. Daily stretching consistently over 4 to 8 weeks produces meaningful improvements in adductor flexibility for most people with this presentation.
Are groin stretches the same as hip flexor stretches?
No, though the regions are close. Hip flexor stretches (as covered in the exercise for psoas muscle strengthening article on this site) target the iliopsoas and rectus femoris, which flex the hip. Groin stretches target the hip adductors, which bring the legs together. The two muscle groups are adjacent but have different functions and require different stretches. Some people have both hip flexor and adductor tightness and benefit from targeting both.
How long does it take to improve groin flexibility?
With consistent daily stretching, meaningful improvements in adductor range of motion are typically noticeable within 3 to 4 weeks. Significant changes (measured as increased range on the butterfly or side lunge stretches) typically occur within 6 to 8 weeks. Stretching programmes that are inconsistent (a few sessions per week or less) produce much slower improvements.
Can tight groin muscles cause knee pain?
Yes, through altered biomechanics. The adductors pull the femur medially (inward), and when tight or overactive relative to the hip abductors, they can produce an adducted and internally rotated thigh position during weight-bearing. This altered femoral position increases the valgus stress on the knee (as covered in the what causes a knee to buckle article on this site), which can contribute to patellofemoral pain and increased ACL stress. Addressing adductor-abductor balance through both adductor stretching and hip abductor strengthening (as covered in the lateral band walk exercise article on this site) is part of the management for some knee pain presentations.