Hip adduction is the movement of pulling your thigh inward toward the midline of your body. It sounds simple, but the muscles responsible for this motion do far more than squeeze your legs together. They stabilize your pelvis when you walk, help extend your hip under load, position your foot during quick direction changes, and play a surprisingly large role in knee mechanics during running. Normal hip adduction range is about 15 to 20 degrees from a neutral standing position.
The Five Muscles That Power Hip Adduction
Five muscles make up the adductor group, all located along the inner thigh. They are the pectineus, adductor longus, adductor brevis, gracilis, and adductor magnus. Most of these muscles originate from the pubic bone or nearby parts of the pelvis and attach along the length of the thighbone. The exception is the gracilis, which bypasses the thighbone entirely and attaches below the knee on the inner shinbone.
The adductor magnus is the largest of the group and arguably the most versatile. It’s a broad, triangular muscle with two distinct portions. One section functions like a traditional adductor, pulling the thigh inward. The other portion mirrors the hamstrings in both structure and nerve supply, running nearly vertically from the sit bone to the inner knee. This dual nature means the adductor magnus contributes to hip extension as well as adduction, making it critical for movements like sprinting, squatting, and climbing stairs.
Pelvis Stability During Walking
Every time you take a step, one leg lifts off the ground. The hip adductors on the standing leg work to keep your pelvis from dropping on the unsupported side. When these muscles can’t do their job, the pelvis tilts toward the swinging leg, a pattern known as Trendelenburg gait. That pelvic tilt shifts your center of mass away from the standing hip, forcing the joint to absorb significantly more stress with each step.
The adductors are especially active right after your foot hits the ground, during what’s called the loading response. This is the moment when your full body weight transfers onto one leg, and the adductors fire to control the thigh’s position and keep the pelvis level. Later in the gait cycle, during the phase just before your foot pushes off, the adductor longus and gracilis help generate the knee flexion velocity needed for a smooth swing phase. When adductor strength drops by roughly 35%, walking speed decreases and knee bending during swing becomes noticeably stiffer, approaching what clinicians call a stiff-knee gait pattern.
Hip Extension and the Adductor Magnus
Most people associate hip extension with the glutes and hamstrings, but the adductor magnus is a major contributor, particularly when the hip is already flexed. In a neutral standing position, the adductor magnus has an extensor moment arm of about 5.8 centimeters, which is actually larger than that of the gluteus maximus at 4.6 centimeters. As the hip flexes further (think the bottom of a squat or a forward lean), the glutes lose mechanical advantage while the adductors and hamstrings gain it.
This is why people with strong adductors often feel more powerful coming out of deep squats or pulling from the floor in a deadlift. The adductor magnus picks up the slack at the exact hip angles where the glutes are weakest. It’s also why inner thigh soreness after heavy squatting is so common: the adductor magnus is working hard as a hip extensor throughout the lift.
Cutting, Pivoting, and Change of Direction
In sports that involve quick lateral movements, the hip adductors serve a role that goes beyond simply squeezing the legs together. During a run-to-cut maneuver, the hip adducts just before the plant foot contacts the ground, positioning the foot underneath the body for a stable base. Through the middle of the stance phase, the adductors hold the thigh in place against the outward forces generated by the direction change. Then, as the athlete pushes off and begins to swing the leg forward, the hip adducts again to drive into the new direction.
This sequence of eccentric braking, isometric holding, and concentric pulling places enormous demands on the adductor longus in particular. It’s no coincidence that adductor injuries are extremely common in sports with frequent cutting and pivoting. In elite soccer, 67% of all groin injuries are adductor-related. Across European professional leagues, adductor injuries account for about 25% of all muscle injuries, and their recurrence rate sits at 29%, one of the highest for any muscle group. Overuse injuries in soccer are mostly adductor-related as well.
Connection to the Pelvic Floor
There’s a popular belief that squeezing your inner thighs together can help activate the pelvic floor muscles, and some rehabilitation programs have incorporated hip adduction exercises for this purpose. The anatomy supports a connection: the adductors and pelvic floor muscles share attachment points on the pubic bone, and they do contract in coordination during certain movements.
However, recent research suggests the relationship is more complicated than “squeeze your thighs to strengthen your pelvic floor.” When healthy participants performed pelvic floor contractions while simultaneously contracting their hip adductors, the efficiency of pelvic floor activation actually decreased compared to performing pelvic floor exercises alone. The likely explanation is dual-task interference: when the brain tries to maximally contract two muscle groups at once, performance in one or both drops. For pelvic floor rehabilitation, focused contraction of the pelvic floor without adding hip adduction may produce better results, though findings in people with pelvic floor dysfunction could differ.
Training the Hip Adductors
Two of the most commonly prescribed adductor exercises are the ball squeeze (squeezing a ball between the knees while lying down with hips bent to about 45 degrees) and the Copenhagen adduction (a side plank variation where the top leg is supported on a bench and the bottom leg lifts to meet it). Both effectively target the adductor longus, but they load it differently.
Ball squeezes produced higher average muscle activation (33% of peak capacity) compared to the Copenhagen adduction (26% of peak capacity) in university football players. Peak activation levels were similar between the two exercises, but the ball squeeze maintained higher activation throughout the movement. This makes ball squeezes a good starting point for early-stage strengthening or return-to-sport programs, while the Copenhagen adduction adds a stability and coordination challenge that more closely mimics athletic demands. The Copenhagen exercise also loads the adductors through a longer range of motion and in a more functional position, which matters for athletes returning from groin injuries.
For general strength, the adductors also get significant work during squats, lunges, and lateral movements. Because the adductor magnus functions as a hip extensor, compound lower-body exercises train it alongside the glutes and hamstrings without any isolation work. Adding dedicated adduction exercises matters most for injury prevention in high-risk sports or for addressing a specific weakness identified during rehabilitation.