Adductor Longus Tear: Grades, Surgery, and Recovery

An adductor longus tear is a partial or complete disruption of the adductor longus muscle or its tendon, typically at the point where it attaches to the front of the pubic bone. It is the most commonly injured structure in groin injuries among athletes, accounting for roughly a quarter of all hip and groin injuries in collegiate sports in the United States.¹ The injury ranges from a minor strain that sidelines you for two weeks to a complete avulsion off the bone that can keep you out for months, and the line between needing surgery and not is narrower than most people realize.

Why the Adductor Longus Is So Vulnerable

The adductor longus sits on the inner thigh and runs from the front of the pubic bone down to the middle third of the femur. Its job is to pull your leg inward (adduction), but it also assists with hip flexion and rotation. The muscle’s proximal attachment is distinctive: on its superficial surface the attachment is tendinous, while the deeper surface is muscular. Cadaver studies found this pattern in 18 of 20 limbs examined.² That hybrid junction concentrates stress at a small area of tissue, making it a weak link when large forces pass through it.

The vulnerability goes beyond the muscle itself. The proximal tendon has connections to the rectus sheath on the opposite side, the pubic symphysis capsule, and even the contralateral adductor longus tendon. This web of connections means the adductor longus is not just moving your leg; it is part of an anatomical highway that transmits force across the pelvis during multidirectional movement.³ When you plant one foot and cut sideways, or wind up for a hard kick, those forces travel through the adductor longus origin at high speed. The muscle has to both lengthen under load and then fire to redirect your leg, often in a fraction of a second.

How These Injuries Happen

A systematic video analysis of acute adductor longus injuries in male football (soccer) players found that most occurred without any contact from another player. About seven out of ten injuries were non-contact, and more than half happened when the player had to react quickly to a sudden change in play.⁴

The specific movements that cause the tear fall into two broad categories. Closed-chain movements, where your foot is on the ground, accounted for about 60% of injuries. These included sudden changes of direction and reaching actions, and they shared a common hip position: the hip was extending, abducting, and externally rotating at the moment of injury. Open-chain movements like kicking and jumping made up the remaining 40%, and these typically involved a rapid switch from hip extension to hip flexion with the leg moving from wide to narrow.⁵ In both patterns, the underlying mechanism is the same: the muscle is lengthening rapidly while being asked to activate forcefully.

Biomechanical modeling of the maximal-effort soccer kick illustrates the strain involved. During the kicking leg’s swing phase, the adductor longus stretches at a peak rate of about 22 cm per second. Crucially, the muscle begins activating between 10% and 50% of the swing phase, which overlaps with the period of maximum stretch rate. This means the muscle is contracting while still being pulled longer, a recipe for strain injury.⁶

Who Gets Hurt and How Often

Adductor injuries cluster in sports that demand sudden lateral movement and kicking. Among collegiate athletes, men’s soccer and men’s ice hockey have the highest injury rates, followed closely by women’s ice hockey. Men have a roughly 40% higher rate of hip and groin injuries than women in comparable sports.⁷

A large study of UEFA soccer athletes from 2000 to 2015 captured 671 players with adductor muscle injuries. The vast majority were mild to moderate, with about 86% of players missing between four and 28 days. Only around 4% required surgery. Players missed a median of 22 days and four matches, though the range was enormous, stretching from a single day to nearly two years.⁸ That wide range underscores how different a minor strain is from a complete tear.

Diagnosing the Tear

The initial evaluation is hands-on. Tenderness directly over the adductor longus origin near the pubic bone is the hallmark finding. In athletes with adductor-related groin pain, palpation tenderness at that spot was found in 94% of cases.⁹ The examiner will also test pain with resisted adduction (squeezing your legs together against resistance) and with passive stretching into hip abduction. Resisted adduction with the knees extended may be more specific for an actual muscle strain than the commonly used adductor squeeze test with knees bent, because the bent-knee squeeze picks up a wider range of groin and hip problems rather than pinpointing the adductor longus.¹⁰

When the clinical picture suggests a significant tear, imaging helps determine the severity. Ultrasound is a fast, relatively inexpensive option that works well for detecting both partial- and full-thickness adductor longus injuries, with the added advantage of allowing the examiner to move the limb and compare sides in real time.¹¹ MRI is generally reserved for complex cases or when the diagnosis is unclear, since it provides a broader view of the surrounding structures. One important caveat about imaging: asymptomatic findings like tendon degeneration, calcifications, and cortical erosions are common in athletes and do not necessarily explain the pain.¹² Imaging should always be read alongside the clinical picture, not in isolation.

Severity Grades and What They Mean for Your Timeline

Adductor longus tears are graded by how much tissue is disrupted. Lower-grade injuries (grades 0 through 2) involve stretching, minor fiber disruption, or a partial tear. Grade 3 injuries are complete or near-complete tears, often involving avulsion of the tendon from its bony attachment. The difference in recovery time between these categories is dramatic.

In a prospective study using criteria-based rehabilitation, athletes with grade 0-2 injuries reached full team training in a median of about 18 days. Athletes with a grade 3 injury needed a median of 78 days to reach the same milestone.¹³ A systematic review found that partial tears treated conservatively generally allowed return to play within one to seven weeks depending on grade, while complete tears took an average of about nine weeks with non-operative treatment and about 14 weeks after surgery.¹⁴ Surgery typically involves a longer timeline in part because the tendon stump has retracted further and the repair needs time to heal before loading.

When Surgery Is Needed

Most adductor longus tears, even many complete tears, are managed without surgery. A study of proximal adductor tendon ruptures in NFL athletes found that non-operative treatment resulted in a faster return to play than surgical repair, with an equal likelihood of returning to professional competition.¹⁵ This finding is significant because it challenges the assumption that complete tears automatically require the knife.

That said, surgery becomes a strong consideration in two scenarios. The first is when the torn tendon has retracted more than about 2 cm from the bone and you can feel a clear gap at the rupture site. A tendon that retracted sits in an unstable position where scar tissue alone is unlikely to restore proper function. The second scenario is when conservative treatment has been tried and failed: the tendon heals with tight, restrictive scar tissue that causes ongoing groin pain and prevents a return to sport.¹⁶ A case report of a distal rupture in a soccer player illustrated this second path: after two months of conservative care, a palpable mass persisted on the inner thigh with pain during moderate daily activities and insufficient leg strength, prompting surgical reattachment.¹⁷

Surgical techniques vary by location. Proximal avulsions are typically reattached to the pubic bone using suture anchors. In one case of a completely avulsed adductor longus in an equestrian rider, repair with three suture anchors allowed a return to full preinjury function within three months.¹⁸ Some surgeons now pair the proximal repair with a release of the distal fascia to reduce tension on the repair site.

Rehabilitation After an Adductor Longus Tear

Rehabilitation follows a phased approach regardless of whether the tear was treated surgically or conservatively, though the timeline differs. The earliest phase focuses on controlling pain and inflammation while protecting the healing tissue. You begin gentle, controlled loading of the adductor muscles, usually guided by a pain threshold (often keeping pain at 2 out of 10 or lower during exercises). As the tissue heals, you progress through increasing loads: isometric holds give way to resistance exercises through a range of motion, then sport-specific drills, and finally full training and competition.

A case report of a professional tennis player with a proximal adductor longus tear detailed a 24-week rehabilitation program that started five days after injury. Pain, strength, range of motion, and hip function scores all improved significantly by weeks 12 to 16. The athlete returned to competitive tennis at 16 weeks and remained symptom-free at six months.¹⁹ For less severe injuries, the process is compressed considerably. Athletes with complete avulsions treated with exercise-based rehabilitation returned to sport at a median of 69 days, with excellent functional scores at one year.²⁰

Criteria-based progression matters more than any fixed calendar. Some rehabilitation programs use platelet-rich plasma injections alongside physical therapy to stimulate tissue healing, though evidence for PRP in this context remains limited and comes primarily from individual case reports rather than large trials.²¹

Recurrence and Long-Term Outlook

Reinjury is a genuine concern. Among the UEFA soccer cohort, about one in five players who returned to play after an adductor muscle injury experienced a reinjury.²² That is a high rate, and it likely reflects both the difficulty of fully restoring strength to the inner thigh and the persistent biomechanical demands these athletes face.

A case report of a soccer player who ruptured his adductor longus and then re-ruptured it illustrates both the risk and the body’s ability to adapt. After the first rupture, he returned to full training in 15 weeks. After the second rupture in the same muscle, he was back in 12 weeks. Full adductor strength, however, took 52 weeks to recover after the first injury and only 10 weeks after the second, suggesting the muscle had undergone remodeling that actually made the second recovery more efficient despite a second complete tear.²³ This is an anecdote, not a pattern, but it points to the adaptability of the healing tissue.

Beyond reinjury of the muscle itself, there is a downstream risk. The interconnection between the adductor longus origin and the lower abdominal structures means that athletes who sustain proximal adductor tears may go on to develop chronic adductor-related groin pain or athletic pubalgia, a condition involving pain where the abdominal muscles and adductor tendons overlap at the pubic bone.²⁴

The Groin Pain Overlap Problem

Groin pain in athletes is notoriously difficult to sort out because multiple structures converge in a small area. An adductor longus tear can look and feel remarkably similar to athletic pubalgia, osteitis pubis, or a rectus abdominis injury. MRI has a high sensitivity for adductor tendon injury (around 86%) but these injuries frequently coexist with rectus abdominis tears and symphysis pathology, making it hard to isolate the pain generator.²⁵

The relationship between adductor dysfunction and osteitis pubis is a good example. MRI studies of soccer players have shown that these two conditions frequently coexist, but adductor problems are also commonly found without osteitis pubis, suggesting that adductor dysfunction typically comes first and the bony stress reaction develops later as a consequence.²⁶ This sequence matters clinically, because treating the adductor problem early may prevent the more stubborn symphysis inflammation from developing.

A specific MRI sign called the “superior cleft sign” has been described at the junction where the rectus abdominis and adductor longus meet the pubic bone. This cleft correlates with the symptomatic side and can help distinguish combined rectus/adductor tears from isolated pathology.²⁷ Classification systems are catching up: a recent study of 161 athletes found that all exhibited a complete fibrocartilage avulsion at the pubic attachment, with just over half showing separation of the adductor longus from the pyramidalis muscle above it. Isolated adductor longus avulsions without involvement of surrounding structures were seen in only about one in five athletes.²⁸ The implication is that what looks like a straightforward adductor longus tear often involves more of the pubic attachment complex than the name suggests.

Adolescent Athletes and the Open Growth Plate

The adductor longus attaches to the pubic bone through an apophysis, a secondary growth center that does not fully fuse until surprisingly late. CT scans have shown that the pubic apophysis can remain open until age 21, and skeletal immaturity at this site has been documented in individuals as old as 26.²⁹ In adolescent athletes, the growth plate is weaker than the tendon, so the injury pattern shifts: instead of tearing the tendon or muscle, the stress fractures or irritates the growth plate itself, a condition called pubic apophysitis.

In a group of highly trained adolescent soccer players (average age about 15-16) with adductor-related groin pain, CT scans showed widening and asymmetry of the pubic growth plates along with small cyst-like expansions that were not seen in age-matched controls. Adduction against resistance was painful in 20 of 26 participants and became painful in all 26 when tested with the hip in a stretched position. Return to full play took between six weeks and four months.³⁰ The practical takeaway for young athletes and their parents: groin pain in a teenager who plays a cutting or kicking sport should not be dismissed as a simple muscle pull. The growth plate may be involved, and management needs to account for that still-developing bone.