Exercise Ball Lying Isometric Hip Adduction
What Is the Exercise Ball Lying Isometric Hip Adduction?
Exercise Ball Lying Isometric Hip Adduction is an isolation exercise that primarily targets the hips and groin, working the inner-thigh adductors with light help from the obliques. It is a beginner-level movement in which you lie on your back with your knees bent and feet flat on the floor, squeeze a stability ball between your knees, and hold the squeeze without moving your legs.
Because the legs stay still, the adductors can work hard while the hip rests in one comfortable position. That makes the exercise a common early step in groin and hip rehabilitation, a gentle inner-thigh exercise for older clients and beginners, and a low-impact way to train the adductors when lunges or side-lying work are still uncomfortable. You set the load entirely by how hard you squeeze, so the same exercise covers both a light activation hold and a near-maximal effort. A study in adult male soccer players found that a maximal 10-second squeeze against a soccer ball between the knees, lying with the hips and knees bent, drove adductor longus activity to 118% of the players' maximal isometric test contraction.
The adductor longus and adductor magnus do most of the work, helped by the smaller gracilis and pectineus, while the obliques and gluteus medius only steady the pelvis. The size of the ball sets the hip position. A stability ball, as used here, holds the knees wide so the adductors squeeze from a lengthened position and the ball gives clear feedback as it compresses. A soccer ball, small soft ball, folded pillow or rolled towel keeps the knees closer together, which is the setup many groin rehabilitation programs use.
It suits older clients, beginners and anyone returning from a groin strain, adductor-related groin pain or hip pain who needs a controlled way to rebuild inner-thigh strength. Start with a moderate squeeze and short holds, then build toward harder squeezes and longer holds. Once a firm squeeze feels easy and pain-free, dynamic work such as Side-Lying Hip Adduction and later the Copenhagen Plank (Bent Knee) load the adductors through movement, and pairing it with the Clamshell trains the outer hip as well.
Muscles Worked
- Adductor Longus
- Primary
- Adductor Magnus
- High
- Rectus Abdominis
- Minimal
Instructions
- Lie on your back on a mat with your knees bent and your feet flat on the floor, so your thighs angle up at roughly 45 degrees.
- Place a stability ball between your knees so it sits against your inner knees and lower thighs.
- Rest your arms along your sides with your palms down and your head on the floor.
- Keep your lower back in its natural position, neither arched off the floor nor pressed hard into it.
- Breathe out and squeeze your knees into the ball, pressing with your inner thighs rather than your feet.
- Hold the squeeze for the target time, breathing steadily and keeping your feet, hips and lower back still.
- Ease off the pressure slowly without letting the ball drop, rest briefly, and repeat.
Common Mistakes
Holding the breath
Holding your breath through the squeeze raises blood pressure and tension, so breathe out as you squeeze and keep breathing through the hold.
Arching the lower back
Squeezing hard can tip the pelvis forward and lift the lower back off the floor, which shifts tension away from the inner thighs.
Pushing through the feet
Driving the feet into the floor turns the squeeze into a partial bridge and brings in the glutes and hamstrings instead of the adductors.
Squeezing too hard too soon
Going straight to a maximal squeeze with an irritated groin often flares the pain, so build the effort over several sessions.
Letting the squeeze fade
Effort tends to drift down during a long hold, so keep the pressure on the ball steady until the time is up or shorten the hold.
Injuries
Exercise Ball Lying Isometric Hip Adduction is a low risk exercise when performed with proper technique. The legs do not move, the floor supports the whole body, and you control the load by how hard you squeeze, so there is little that can go wrong. The main strain points are the adductor tendons where they attach near the pubic bone and the pubic symphysis itself, both of which can be irritated in people with groin pain when the squeeze is too hard too soon.
Build the effort gradually. Start with a moderate squeeze and short holds, and raise the effort over several sessions. During rehab, keep the squeeze below the point where it provokes groin pain; mild discomfort that settles once you release is usually acceptable, while pain that lingers or is worse the next day means the effort or volume was too high. Breathe steadily through every hold instead of holding your breath, which matters most for clients with high blood pressure.
To make it easier, squeeze more gently and shorten the holds. If the wide knee position of a stability ball bothers your hips, a smaller ball or a folded pillow brings the knees closer together. To progress, squeeze harder and hold longer, then move on to dynamic adductor work such as Side-Lying Hip Adduction and the Copenhagen Plank (Bent Knee).
Stop if you feel sharp pain in the groin or at the pubic bone, a clicking or shifting sensation at the front of the pelvis, or pain that spreads into the lower abdomen. Clients in later pregnancy should avoid long stretches lying flat on their back, and anyone with pregnancy-related pelvic girdle pain or a recent hip replacement should follow the guidance of their physical therapist.
- Primary Focus
- Hips & groin
- Equipment
- Exercise ball
- Modality
- Strength
- Difficulty
- Beginner
Alternative Exercises
Other Names for the Exercise Ball Lying Isometric Hip Adduction
The Exercise Ball Lying Isometric Hip Adduction is also known as:
- Supine Stability Ball Squeeze
- Adductor Ball Squeeze
Frequently Asked Questions
- Q: Can I use a small ball or a pillow instead of a stability ball?
Yes. A soccer ball, small soft ball, folded pillow or rolled towel works the same muscles and keeps your knees closer together, while a stability ball holds them wider and gives a larger surface to squeeze, so choose the size that feels comfortable for your hips.
- Q: How long should I hold each squeeze?
Start with 5 to 10 second holds at a moderate squeeze, repeated 5 to 10 times with a short rest between them. As it gets easier, build toward 30 second holds before adding more sets.
- Q: How hard should I squeeze the ball?
Squeeze firmly enough to feel your inner thighs working while you can still breathe steadily. If you are recovering from groin pain, keep the effort below the point where it provokes pain and build toward a stronger squeeze as it settles.
- Q: Does this exercise help with groin pain?
It is a common first step. In a randomized trial in athletes with long-standing adductor-related groin pain, an active training program aimed at adductor strength and coordination, which opened with static ball squeezes like this one, returned 23 athletes to their sport without groin pain compared with 4 after physiotherapy without active training. Groin pain has several possible causes, so have it assessed if it does not settle.
- Q: Is this exercise suitable for older adults?
Yes. It is done lying down with the body fully supported, involves no joint movement or balance demand, and the effort is easy to scale. Getting down to and up from the floor is the main hurdle, so it can also be done on a firm bed or treatment table.