Why Does My Elbow Twitch at 90 Degrees? the Cause - Orthopedics

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Experiencing twitching or muscle spasms in the elbow when it is bent at a 90-degree angle can be concerning, especially if accompanied by unusual sounds during weight training. While the twitching itself may not be painful, it is essential to understand the underlying causes and whether it indicates an injury or a benign condition.

Muscle twitching, also known as fasciculation, can occur for various reasons. In your case, it may be related to muscle fatigue, overuse, or even dehydration. When engaging in weight training, especially with heavy loads or high repetitions, the muscles can become fatigued, leading to involuntary contractions. This is particularly true if you are pushing your limits or using a range of motion that your muscles are not accustomed to.
Another potential cause of twitching could be related to nerve irritation or compression. The ulnar nerve, which runs along the inner side of the elbow, can sometimes become compressed, leading to symptoms such as twitching, tingling, or weakness in the arm. This condition is often referred to as "cubital tunnel syndrome." If the twitching is accompanied by any numbness or tingling in the fingers, it would be wise to consult a healthcare professional.

The sound you describe as "卜卜聲" (which could be interpreted as popping or cracking) during weight training may be due to several factors. It could be related to the movement of tendons over bony structures or the release of gas bubbles in the joint fluid, a phenomenon known as cavitation. As long as there is no pain associated with these sounds, they are often considered harmless. However, if the sounds are accompanied by discomfort or if you notice swelling or decreased range of motion, it would be prudent to seek medical evaluation.

To address your concerns, here are some recommendations:
1. Rest and Recovery: Ensure you are allowing adequate recovery time between weight training sessions. Overworking the muscles can lead to fatigue and twitching.

2. Hydration and Nutrition: Dehydration and electrolyte imbalances can contribute to muscle spasms. Make sure you are drinking enough water and consuming a balanced diet rich in potassium, magnesium, and calcium.

3. Warm-Up and Stretching: Prior to engaging in weight training, ensure you are properly warming up and stretching the muscles around the elbow. This can help prevent injuries and reduce the likelihood of twitching.

4. Modify Your Training: If certain movements or weights are causing discomfort or twitching, consider modifying your training regimen. Focus on proper form and avoid excessive ranges of motion that may strain the muscles or joints.

5. Consult a Professional: If the twitching persists or worsens, or if you experience any additional symptoms such as pain, swelling, or changes in strength, it is advisable to consult a healthcare professional, such as an orthopedic specialist or a physical therapist. They can perform a thorough evaluation and provide personalized recommendations based on your specific situation.

In summary, while twitching in the elbow at a 90-degree angle may not necessarily indicate a serious injury, it is essential to pay attention to your body’s signals. By taking preventive measures and seeking professional advice when needed, you can ensure that your training remains safe and effective.