Boxer's Knuckle: Impact on Sports and Recovery Options - Orthopedics

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Boxer's knuckle (extensor tendon injury) in the finger?


I have been practicing Taekwondo and hitting the punching bag, and about 5 to 6 years ago, I noticed that when I make a fist with my left hand, the extensor hood of all four fingers shifts.
Later, I researched online and learned that this is called "boxer's knuckle." Although it doesn't significantly affect my daily life, it can sometimes be bothersome and feel a bit stiff.
I found information suggesting that surgical repair may be necessary.
I would like to ask if, under normal circumstances, it doesn't have much impact, but since I also engage in fitness and boxing, will it affect my athletic performance? Are there any hidden risks? After undergoing the repair surgery, will I be able to return to normal activities?

LEE, 20~29 year old female. Ask Date: 2022/08/25

Dr. You Dianqi reply Orthopedics


Hello LEE, it is advisable for you to seek medical attention as soon as possible to avoid delaying treatment.
Thank you.

Reply Date: 2022/08/25

More Info


Boxer's knuckle, medically known as a dorsal capsular injury or a rupture of the extensor hood, is a condition that can arise from repetitive trauma or acute injury to the knuckles, particularly in activities involving punching or striking, such as boxing or martial arts. This injury typically affects the extensor tendons that run along the back of the hand and are responsible for extending the fingers.

Impact on Sports and Daily Activities
In your case, having experienced this condition for several years, it seems that while it has not significantly hindered your daily activities, it does cause some discomfort and a feeling of instability when making a fist. This is not uncommon, as boxer's knuckle can lead to a sensation of "catching" or "snapping" in the fingers, particularly when engaging in activities that require a strong grip or precise finger movements.
For athletes, especially those involved in contact sports or activities that require hand strength and dexterity, boxer's knuckle can pose several risks:
1. Reduced Performance: The instability and discomfort associated with boxer's knuckle can lead to decreased grip strength and control, which may affect your performance in sports like taekwondo or boxing. This can hinder your ability to strike effectively or maintain proper technique during training.

2. Increased Risk of Further Injury: Engaging in high-impact activities with an unstable joint can increase the risk of further injury. If the extensor hood is compromised, there is a potential for additional damage to the surrounding structures, including ligaments and tendons.

3. Chronic Pain and Dysfunction: Over time, if left untreated, boxer's knuckle can lead to chronic pain and dysfunction in the hand, which may limit your ability to participate in sports or even perform daily tasks comfortably.


Recovery Options
In terms of recovery, there are several options available, depending on the severity of your condition:
1. Conservative Management: For mild cases, conservative treatment may include rest, ice application, and anti-inflammatory medications. Physical therapy can also be beneficial to strengthen the surrounding muscles and improve stability.

2. Surgical Intervention: If conservative measures fail and the symptoms persist, surgical repair of the extensor hood may be necessary. This procedure typically involves reattaching the torn or damaged structures to restore function and stability to the fingers. Post-surgery, a rehabilitation program is crucial to regain strength and range of motion.
3. Rehabilitation: After surgery, a structured rehabilitation program will help you gradually return to your previous level of activity. This may include exercises to improve flexibility, strength training, and functional training specific to your sport.

Post-Surgery Expectations
Following surgical repair, most individuals can expect to return to normal activities, including sports, although the timeline may vary based on the extent of the injury and the individual's healing process. Generally, it may take several weeks to months for full recovery, during which time adherence to rehabilitation protocols is essential.

In conclusion, while boxer's knuckle may not significantly impact your daily life at the moment, it can pose risks to your athletic performance and overall hand function. If you are experiencing persistent symptoms, it may be worthwhile to consult with a hand specialist or orthopedic surgeon who can provide a thorough evaluation and discuss the best course of action tailored to your specific needs and goals. Engaging in preventive measures and addressing the condition early can help mitigate long-term complications and enhance your performance in sports.

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