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Adductor Strain: Causes, Symptoms and Treatment

An adductor strain is a painful overstretching of the inner thigh muscles. It is a common sports injury that causes groin pain and limited range of motion.

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Things worth knowing about "Adductor Strain"

An adductor strain is a painful overstretching of the inner thigh muscles. It is a common sports injury that causes groin pain and limited range of motion.

What Is an Adductor Strain?

An adductor strain is an injury to the adductor muscles – the muscle group located on the inner side of the thigh. These muscles are responsible for pulling the leg toward the midline of the body, a movement known as adduction. In a strain, the muscle fibers are overstretched without a complete tear occurring. Adductor strains are among the most common sports injuries, particularly affecting football players, hockey players, and track-and-field athletes.

Causes

An adductor strain typically results from a sudden, uncontrolled movement that forces the adductor muscles beyond their normal range of capacity. Common causes include:

Abrupt changes of direction or sprinting during sports activities
Sliding tackles or split-like movements
Inadequate warm-up before physical activity
Muscular imbalances or overtraining
Previous injuries to the groin or thigh region

Symptoms

Typical symptoms of an adductor strain include:

Pain along the inner thigh or in the groin area, worsening with movement
Tenderness to the touch over the affected muscle
Swelling or localized stiffness in the injured area
Reduced range of motion when spreading the legs apart
Occasional feeling of weakness in the affected leg

In more severe cases, a popping or snapping sensation may be felt at the moment of injury, which may indicate a partial or complete muscle tear.

Diagnosis

Diagnosis is typically made through a physical examination by a physician or sports medicine specialist, assessing pain location, range of motion, and muscle strength. To determine the exact severity of the injury, an ultrasound examination (sonography) may be performed. In cases where a complete muscle tear is suspected, an MRI (magnetic resonance imaging) scan may be ordered. The injury is generally classified into three grades:

Grade I: Mild overstretching with minimal fiber damage
Grade II: Partial tear of individual muscle fibers
Grade III: Complete rupture of the muscle or tendon

Treatment

Immediate First Aid

Immediately after the injury, the RICE protocol is recommended:

Rest – stop activity immediately and protect the injured area
Ice – apply ice to the area to reduce swelling (avoid direct skin contact)
Compression – apply a gentle compression bandage to limit swelling
Elevation – raise the leg to promote venous drainage

Further Treatment

Depending on the severity of the injury, treatment may include:

Physiotherapy: Targeted stretching and strengthening exercises to restore muscle function
Pain management: Use of anti-inflammatory medications (e.g., ibuprofen) as needed
Manual therapy: To release muscle tension and improve circulation
Gradual return to sport: A progressive loading program following full recovery

Recovery time varies depending on the grade of injury – from a few days (Grade I) to several weeks or months (Grades II–III). Returning to sport too early significantly increases the risk of re-injury.

Prevention

Adductor strains can often be prevented by taking the following measures:

Thorough warm-up before physical activity
Regular stretching of the inner thigh muscles
Strengthening of the adductors and surrounding muscle groups
Gradual increase in training intensity
Adequate recovery time between intense training sessions

References

Petersen W, Rembitzki I, Liebau C. - Groin pain in athletes: etiology, diagnosis and therapy. Dtsch Arztebl Int. 2017;114(45):764-770.
Hölmich P. - Long-standing groin pain in sportspeople falls into three primary patterns: a clinical entity approach. Br J Sports Med. 2007;41(4):247-252.
Tyler TF, et al. - The association of hip strength and flexibility with the incidence of adductor muscle strains in professional ice hockey players. Am J Sports Med. 2001;29(2):124-128.

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