Knee Joint Issues: Causes and Care for Runners

Knee joint

Hello, Doctor! I have been jogging for about 4 years, running 4 to 5 kilometers each time.
I do warm-up exercises before running and stretch afterward to eliminate some lactic acid.
Recently, I've been experiencing a grinding sound in my left knee joint when walking, and sometimes it feels like it gets stuck, making it difficult to step on the ground smoothly.
I can only walk after gently massaging it.
I'm not sure what the issue might be.
In my daily routine, I take one glucosamine supplement before breakfast and one calcium tablet in the afternoon.
Is this sufficient for maintenance? Thank you! Tony

Tony, 40~49 year old female. Ask Date: 2006/09/12

Dr. Chen Xianchang reply Rehabilitation

1.
It may be a phenomenon of knee joint degeneration.

2.
The dosage of glucosamine is approximately 3 tablets per day (totaling 1000 mg), and calcium supplements are about 800 mg.

3.
It is necessary to perform more leg elevation exercises to increase thigh muscle strength and prevent wear of the knee cartilage.

Reply Date: 2006/09/12

More Info

Knee joint issues are a common concern among runners, especially those who have been active for several years. Your experience of hearing a "crackling" sound in your left knee and feeling as if it gets "stuck" while walking may indicate a few potential problems related to the knee joint. Let's delve into the possible causes and care strategies for runners like yourself.

Possible Causes of Knee Joint Issues
1. Patellofemoral Pain Syndrome (PFPS): This condition is often characterized by pain around the kneecap, which can be exacerbated by activities like running, squatting, or climbing stairs. The crackling sound you hear could be due to the kneecap not tracking properly in its groove during movement.

2. Meniscus Tears: The meniscus is a cartilage structure in the knee that can be torn due to sudden twisting motions or excessive strain. If the meniscus is damaged, it can lead to a sensation of locking or catching in the knee, along with a popping or crackling sound.

3. Chondromalacia Patella: This condition involves the softening and breakdown of the cartilage on the underside of the kneecap. It can cause pain and a grinding sensation when moving the knee.

4. Osteoarthritis: Over time, repetitive stress on the knee joint from running can lead to wear and tear of the cartilage, resulting in osteoarthritis. This condition can cause stiffness, pain, and the sounds you are experiencing.

5. Iliotibial Band Syndrome: This occurs when the iliotibial band, a ligament that runs along the outside of the thigh, becomes tight and rubs against the knee joint, leading to pain and discomfort.

Care and Management Strategies
1. Rest and Recovery: Given your symptoms, it may be beneficial to take a break from running to allow your knee to recover. This can help reduce inflammation and prevent further injury.

2. Physical Therapy: Consulting with a physical therapist can be invaluable. They can assess your knee mechanics and provide exercises to strengthen the muscles around the knee, improve flexibility, and correct any biomechanical issues.

3. Strength Training: Focus on strengthening the quadriceps, hamstrings, and hip muscles. Stronger muscles can help stabilize the knee joint and reduce the risk of injury.

4. Proper Footwear: Ensure that you are wearing appropriate running shoes that provide adequate support and cushioning. Shoes that are worn out or not suited for your foot type can contribute to knee problems.

5. Cross-Training: Consider incorporating low-impact activities such as swimming, cycling, or yoga into your routine. These can help maintain your fitness level while reducing stress on your knees.

6. Nutritional Supplements: You mentioned taking glucosamine and calcium supplements. While these can be beneficial, it’s essential to ensure you are taking the correct dosages. The typical recommendation for glucosamine is around 1500 mg per day, and for calcium, it’s about 800-1200 mg, depending on your dietary intake. Always consult with a healthcare provider before starting any new supplements.

7. Knee Support: Using a knee brace or support during activities may provide additional stability and help alleviate discomfort.

8. Gradual Return to Running: Once your symptoms improve, gradually reintroduce running into your routine. Start with shorter distances and lower intensity, and pay attention to how your knee responds.

Conclusion
Knee joint issues can be complex, and it’s crucial to listen to your body. If your symptoms persist or worsen, it’s advisable to seek further evaluation from a healthcare professional, such as an orthopedic specialist. They may recommend imaging studies like an MRI to get a clearer picture of the underlying issues. Remember, maintaining a balance between activity and rest, along with proper care, is key to enjoying a long and healthy running journey.

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