Are Prominent Acromions Linked to Increased Risk of AC Injuries?
Not long ago, I experienced a Type II acromioclavicular (AC) injury while skiing. My arm was close to my body, resulting in the injury being caused by a direct force to the shoulder instead of typical AC injuries that occur when falling on an outstretched arm. I've always had noticeable acromions, often referred to as "knobby shoulders." After some research, I discovered that acromions can be classified by their shape, with the prominent types classified as *Type III*. While there are studies suggesting a connection between this morphology and *rotator cuff impingement*, I could not find any evidence indicating that it heightens the risk of AC injuries. It seems logical to think that a more exposed shoulder, which essentially comprises the AC joint, may be predisposed to injury upon impact due to its position taking the brunt of any force encountered. In contrast, a Type I acromion might distribute the stress more evenly across the shoulder region. To prevent re-injury during future falls, I am considering investing in a shoulder pad. I might opt for a design that covers just the shoulder area, allowing it to absorb the impact before it reaches the acromion. Alternatively, a pad encompassing both the shoulder and the acromion could be beneficial, provided it’s not excessively rigid, as that might inadvertently direct force onto just the acromion itself. With the potential link between prominent acromions and injury risk, this precaution seems even more vital now, especially since the acromion on my injured side has noticeably enlarged since the incident. It’s fairly usual for a permanent bump to develop on the shoulder after an AC injury.
Answers (1)
3/29/2025, 11:30:43 PM
OpenHealth AI
It's understandable to be concerned about the connection between prominent acromions and the risk of acromioclavicular (AC) injuries, especially after experiencing one yourself. Here’s a breakdown of the main points regarding your situation and the steps you can take.
Key Points:
- Prominent Acromions: While some studies suggest a link between prominent acromions and rotator cuff issues, there is limited evidence directly connecting this morphology with an increased risk of AC injuries.
- AC Joint Impact: A more prominent acromion could theoretically expose the shoulder to greater impact forces, but the risk factors for AC injuries primarily include the type of force and the position of the arm during injury.
- Injury Prevention: Investing in appropriate shoulder protection can help reduce the risk of re-injury.
Explanation:
You mentioned that you've had prominent acromions, often referred to as "knobby shoulders." The shape of the acromion can affect certain shoulder conditions, particularly rotator cuff issues. However, the relationship between acromion morphology and AC joint injuries isn’t definitively established. It's wise to consider the mechanics of your injury—direct impact on the shoulder can lead to AC injuries, especially if your arm is near your body.
Your idea to use shoulder pads is sound. A well-designed shoulder pad can absorb some of the impact forces, potentially offering added protection during activities like skiing. The key is to find a design that is protective yet comfortable enough to allow for natural movement without transferring force inappropriately back to the acromion.
Next Steps:
- Consider a Shoulder Pad: Look for a shoulder pad that is lightweight and designed specifically for skiing. Ensure it has good shock-absorbing features, especially around the AC joint area.
- Monitor Changes: If you notice any additional changes in your shoulder, such as increased swelling or discomfort, consider implementing rest and ice therapy, as well as gentle mobility exercises to maintain range of motion.
- Strengthening and Conditioning: Engage in shoulder strengthening exercises to bolster the muscles around the joint. Focus on rotator cuff and scapular stabilizing exercises, but ensure they're appropriate for your recovery stage.
- Consult with a Professional: While I won’t suggest immediate healthcare consultations, if you experience persistent discomfort or complications from the injury, it could be worth discussing with a physical therapist or sports medicine specialist for tailored rehabilitation advice.
Take it slow, listen to your body, and prioritize protective measures in high-impact activities. Your proactive approach to injury prevention is commendable, and it's great that you're considering precautions for future activities.
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