Adductor Strain

Lower Limb

Overview

Adductor strain is an acute or chronic injury to the adductor muscle group (longus, brevis, magnus, gracilis, pectineus) of the medial thigh, commonly occurring in athletes due to rapid changes in direction, overload, or muscle imbalance. The condition presents with pain in the medial thigh that may radiate toward the groin and can significantly limit hip adduction and functional activities. Early recognition and appropriate management are crucial to prevent chronic groin pain and return to optimal function.

Pathophysiology

Adductor strain results from excessive eccentric loading, rapid lengthening under tension, or direct trauma to the adductor muscle group. Microtrauma or macroscopic tears occur within the musculotendinous unit, triggering an inflammatory response with edema, hemorrhage, and disruption of muscle fibers. Biomechanical factors such as hip flexor tightness, gluteal weakness, core instability, and asymmetrical movement patterns predispose to injury. Chronic strains may develop due to inadequate initial rehabilitation, persistent biomechanical dysfunction, or premature return to activity.

Patient Education

Gradual return to activity with progressive strengthening and flexibility work is essential; avoid aggressive stretching in acute phase and address underlying hip and core weakness to prevent recurrence.

Typical Presentation

Site

Medial aspect of proximal thigh, may extend toward groin, pubic bone insertion, or along medial thigh toward knee depending on which adductor is affected

Quality

Sharp, aching, or stinging pain; may feel like a muscle pull or cramping sensation

Intensity

Variable: acute strains present with moderate to severe pain (5-8/10) limiting function; chronic strains may be mild to moderate (2-5/10) with activity-related flare-ups

Aggravating

Hip adduction, crossing legs, side-stepping, rapid direction changes, kicking motions, prolonged sitting, resisted hip adduction, sprinting, pivoting, activities requiring explosive movement

Relieving

Rest, ice application, gentle passive stretching (after acute phase), anti-inflammatory medication, support/compression, reduced activity level, heat (chronic phase)

Associated

Hip flexor tightness, buttock pain, groin discomfort, limping gait, hip muscle weakness (gluteal and core), stiffness in medial hip, possible referred pain to anterior knee or lower abdomen

Orthopaedic Tests

Adductor Squeeze Test

Procedure

Patient supine with hip flexed 45° and knee flexed 90°. Examiner places fist between patient's knees and asks patient to squeeze fist maximally for 5 seconds. Pain in the adductor region is noted.

Positive Finding

Reproduction of pain in the medial thigh/groin region during squeezing effort

Sensitivity / Specificity

71% / 86%

Holmich et al., 1999, American Journal of Sports Medicine

Interpretation

Positive test suggests adductor muscle strain or dysfunction; helps differentiate adductor pathology from other groin conditions. Provides baseline for functional strength assessment.

Resisted Adduction Test (Supine)

Procedure

Patient supine, examiner places hand on medial knee. Patient is instructed to adduct the leg against examiner resistance through available range. Pain reproduction and strength are assessed.

Positive Finding

Pain with resisted adduction, particularly at the musculotendinous junction or insertion point

Sensitivity / Specificity

68% / 82%

Reiman et al., 2013, Journal of Athletic Training

Interpretation

Positive result indicates acute or subacute adductor strain; pain typically worsens with contraction. Used to confirm muscular origin of groin pain and monitor recovery.

Adductor Longus Palpation Test

Procedure

Patient supine or semi-recumbent. Examiner palpates the adductor longus tendon at the pubic bone insertion and along the muscle belly while applying gentle pressure, progressing to resisted adduction if tolerated.

Positive Finding

Tenderness, nodules, or exquisite point tenderness at the musculotendinous junction or pubic insertion

Sensitivity / Specificity

Unknown / Unknown

Interpretation

Localizes pathology to adductor longus; helps distinguish between longus, brevis, and magnus involvement. Essential for determining severity and rehabilitation progression.

Passive Hip Abduction (Stretching Test)

Procedure

Patient supine, affected hip and knee flexed. Examiner gently abducts and externally rotates the hip, taking the adductors passively through full stretch. Pain is noted at end-range.

Positive Finding

Pain or restriction in passive hip abduction, particularly acute pain limiting range of motion

Sensitivity / Specificity

64% / 79%

Holmich et al., 2001, British Journal of Sports Medicine

Interpretation

Positive test indicates acute adductor strain limiting flexibility; pain with passive stretch is typical in early stages. Used to gauge healing and guiding return-to-sport decisions.

Ober Test Modification (Adductor Emphasis)

Procedure

Patient in side-lying on unaffected side, affected hip adducted across midline against gravity or light resistance. Examiner observes hip position and range, noting pain or restriction.

Positive Finding

Pain in medial thigh with cross-body adduction or inability to complete adduction smoothly

Sensitivity / Specificity

Unknown / Unknown

Interpretation

Identifies adductor tightness and pain with adduction against gravity; useful for assessing functional deficits and monitoring progress in rehabilitation.

Dynamic Adduction Test (Standing or Half-Kneeling)

Procedure

Patient standing or half-kneeling. Examiner applies lateral (abduction) force to the thigh or pelvis while patient actively maintains hip adduction, resisting the force.

Positive Finding

Pain reproduction in adductors with dynamic stabilization effort, or weakness/inability to resist applied force

Sensitivity / Specificity

Unknown / Unknown

Interpretation

Assesses functional weakness and dynamic stability; particularly relevant for return-to-sport assessment and identifying residual deficits in functional movement patterns.

⚠ Red Flags

  • •Severe sudden onset with inability to weight-bear suggesting complete muscle rupture
  • •Signs of deep vein thrombosis (DVT): calf swelling, warmth, discoloration despite medial thigh injury
  • •Acute severe groin pain with fever suggesting hernia with strangulation or infection
  • •Progressive neurological symptoms (numbness, tingling in distribution of obturator nerve) suggesting nerve compression
  • •Mechanism involving direct trauma with signs of compartment syndrome (severe swelling, severe pain with passive stretch, paresthesia)
  • •History of cancer with new groin mass or unexplained lymphadenopathy
  • •Groin pain associated with systemic symptoms (fever, weight loss, night sweats) suggesting infection or malignancy

⚡ Yellow Flags

  • •High fear-avoidance beliefs limiting rehabilitation participation despite clinical improvement
  • •Chronic strain with poor response to treatment suggesting underlying psychosocial barriers
  • •Athletes with perfectionism or excessive training focus at risk for overuse patterns
  • •Job or sport demands creating persistent biomechanical stress without adequate recovery
  • •Poor compliance with rehabilitation exercises due to lack of understanding of injury mechanism
  • •Anxiety about re-injury preventing confident return to sport or normal function
  • •Secondary gains (continued attention or modified duties) reinforcing pain behavior

Osteopathic Techniques

Region

Adductor muscle group (longus, brevis, magnus, gracilis)

Technique

Soft Tissue

Rationale

Direct soft tissue techniques reduce muscle tension, improve blood flow to facilitate healing, and address myofascial restrictions; particularly effective in acute phase with gentle cross-fiber techniques to prevent adhesion formation and restore tissue mobility

Region

Hip joint and adductor complex

Technique

MET

Rationale

Muscle energy techniques restore hip abduction-adduction balance by engaging and releasing adductor muscles against gentle resistance; effective for normalizing proprioception, improving coordination, and reducing protective muscle guarding while maintaining active participation

Region

Hip joint

Technique

Articulation

Rationale

Gentle articulation through hip abduction-adduction and flexion-extension ranges restores synovial nutrition to the joint, reduces stiffness, and normalizes hip mechanics; particularly useful in chronic phase to restore pain-free range of motion

Region

Lumbar spine, pelvis, and hip complex

Technique

Functional

Rationale

Functional techniques address fascial restrictions and segmental dysfunctions affecting hip adductor function; helps normalize the position of the hip joint and pelvis to reduce compensatory adductor tension and improve movement patterns

Region

Gluteal muscles, hip extensors, and abductors

Technique

Soft Tissue

Rationale

Addressing hip abductor and extensor tension is essential as tightness contributes to adductor overload; soft tissue mobilization reduces compensatory patterns and restores balanced hip musculature

Region

Hip flexors (iliopsoas, rectus femoris) and adductors

Technique

MET

Rationale

Muscle energy techniques targeting hip flexor-adductor chain address common co-existing tightness; restores hip extension and neutral hip positioning to reduce adductor compensatory recruitment during functional activities

Add-On Approaches

Chinese Medicine

Acupuncture to liver and spleen meridians (medial thigh pathway) combined with moxibustion to promote qi circulation and reduce pain; cupping or gua sha over affected musculature to improve blood stasis; herbal support with warming, moving herbs for chronic strains

Chiropractic

Correction of pelvic misalignment and femoral positioning using manipulation; assessment and treatment of sacroiliac joint dysfunction contributing to adductor compensation; soft tissue therapy and stretching protocols

Physiotherapy

Progressive strengthening of hip abductors, external rotators, and core; dynamic stretching and proprioceptive training; eccentric loading exercises for adductor strengthening; sport-specific functional training with gradual return to activity progression

Remedial Massage

Deep tissue techniques to address myofascial restrictions; longitudinal stripping along adductor muscle fibers; cross-fiber friction to affected tendinous insertions; trigger point release of adductor and associated hip musculature; lymphatic drainage for post-acute edema management

Rehabilitation Exercises

Supine Adductor Stretch (Modified Butterfly)

StretchingBeginner

Standing Adductor Stretch with Hip Flexion

StretchingBeginner

Sidelying Hip Abduction with Adductor Lengthening

Range of MotionBeginner

Sidelying Hip Adduction

StrengtheningBeginner

Supine Hip Adduction with Ball Squeeze

StrengtheningIntermediate

Standing Hip Abduction (for gluteal activation and adductor balance)

StrengtheningIntermediate

Clamshells (Hip External Rotation and Abduction)

StrengtheningIntermediate

Supine Bridge with Hip Abduction Focus

PosturalIntermediate

Eccentric Adductor Strengthening (Standing with Theraband)

StrengtheningAdvanced

Single Leg Stance with Hip Control

BalanceAdvanced

Copenhagen Adductor Exercise (Sidelying with Ball Between Knees)

StrengtheningIntermediate

Gradual Return to Sport-Specific Movement (Lateral Stepping, Directional Changes)

CardiovascularAdvanced

Referral Criteria

  • •Severe pain with complete inability to weight-bear or ambulate suggesting complete muscle rupture; refer for ultrasound or MRI imaging and possible surgical assessment
  • •Clinical signs suggestive of DVT (unilateral leg swelling, calf warmth, positive Homan's sign); refer urgently to vascular medicine or emergency department
  • •Suspected inguinal or femoral hernia presenting with palpable mass, vomiting, or signs of obstruction; refer to general surgery
  • •Neurological symptoms (numbness, tingling, weakness in obturator nerve distribution) persisting beyond expected timeline; refer to neurology for nerve assessment
  • •Chronic adductor pain unresponsive to conservative treatment after 6-8 weeks; refer for imaging (ultrasound, MRI) or specialist orthopaedic assessment
  • •Recurrent strains preventing return to function despite appropriate rehabilitation; refer for advanced imaging, biomechanical assessment, or sports medicine consultation
  • •Signs of infection or abscess (fever, localized warmth, fluctuance, lymphadenopathy); refer for infection assessment and possible imaging
  • •Groin pain associated with constitutional symptoms or unexplained weight loss; refer for systemic investigation
  • •Suspected osteitis pubis or pubic symphysis dysfunction; refer to sports medicine or orthopaedics for imaging and specialized management
  • •Inadequate progress after 4 weeks of conservative treatment; refer for physiotherapy assessment, imaging, or specialist consultation to rule out underlying pathology