Why Does My Left Knee Give Out When Squatting? Causes and Solutions - Orthopedics

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The left knee becomes weak and unable to stand up when squatting down?


Hello, Director.
I experience weakness in my left knee when I squat down, making it difficult to stand up.
There is pain on the inner side, but walking and playing basketball do not affect me.
It's only when I squat that I feel weak and in pain.
Could you please explain why this is happening and which specialist I should see? Thank you.

Jiànkāng zuì zhòngyào, 30~39 year old female. Ask Date: 2005/08/04

Dr. Shi Guozheng reply Orthopedics


The pain may be caused by inflammation of the tendons or ligaments on the inner side of the knee joint, and it is advisable to see an orthopedic specialist.
Frequent squatting and standing movements can exacerbate this issue, so reducing these activities may help alleviate the symptoms.

Reply Date: 2005/08/04

More Info


The issue you're experiencing with your left knee giving out during squatting, accompanied by pain on the inner side, is a common concern that can arise from various underlying causes. While you report no pain during walking or playing basketball, the specific mechanics of squatting can place unique stresses on the knee joint, potentially revealing or exacerbating existing conditions.


Possible Causes
1. Patellar Tracking Disorder: This occurs when the kneecap (patella) does not move smoothly along the groove in the thigh bone (femur) as you bend and straighten your knee. This misalignment can cause pain and instability, particularly during movements like squatting.

2. Meniscus Injury: The meniscus is a C-shaped cartilage that acts as a cushion between your thigh bone and shin bone. A tear in the meniscus can lead to pain, swelling, and a feeling of instability, especially when the knee is bent under load, such as during a squat.

3. Ligament Injuries: Injuries to the ligaments that stabilize the knee, such as the medial collateral ligament (MCL) or anterior cruciate ligament (ACL), can lead to pain and a feeling of giving way. These injuries may not always present with pain during normal activities but can be exacerbated by specific movements.

4. Iliotibial Band Syndrome: The iliotibial band (IT band) runs along the outside of the thigh and can become tight or inflamed, leading to pain on the outer side of the knee. While this typically causes pain during activities like running, it can also affect squatting mechanics.

5. Patellar Tendonitis: Often referred to as "jumper's knee," this condition involves inflammation of the tendon connecting the kneecap to the shinbone. It can cause pain during activities that involve bending the knee under load.

6. Muscle Weakness or Imbalance: Weakness in the muscles surrounding the knee, particularly the quadriceps, hamstrings, or hip muscles, can lead to instability during squatting. Muscle imbalances can also contribute to improper tracking of the patella.


Recommended Actions
1. Consult an Orthopedic Specialist: Given the specific nature of your symptoms, it would be advisable to see an orthopedic doctor who specializes in knee injuries. They can perform a physical examination and may recommend imaging studies, such as an MRI, to assess for any structural damage.

2. Physical Therapy: A physical therapist can help you strengthen the muscles around your knee and improve your squatting mechanics. They may also provide you with exercises to enhance flexibility and stability.

3. Modify Activities: Until you receive a diagnosis, it may be wise to avoid activities that exacerbate your symptoms. Focus on low-impact exercises that do not place undue stress on your knee.

4. Pain Management: Over-the-counter anti-inflammatory medications may help alleviate pain and swelling. However, consult with a healthcare provider before starting any medication.

5. Gradual Return to Activity: Once you have a clearer understanding of your condition and have begun treatment, gradually reintroduce squatting and other activities, paying close attention to your body’s signals.


Conclusion
The sensation of your knee giving out during squatting is a signal that should not be ignored. It may indicate an underlying issue that, if left untreated, could lead to further complications. By consulting with an orthopedic specialist and possibly engaging in physical therapy, you can work towards a solution that allows you to return to your normal activities without pain or instability. Remember, addressing the root cause is essential for long-term recovery and prevention of future injuries.

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