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Clavicle Fracture in Runners: Causes and Precautions

Clavicle fractures, also known as collarbone fractures, are a common injury among runners. The clavicle is a long bone that connects the shoulder blade to the sternum, and it plays a crucial role in the movement and stability of the shoulder joint. Fractures of the clavicle can occur due to various reasons, including trauma, overuse, and underlying medical conditions. In this article, we will explore the causes of clavicle fractures in runners and discuss the precautions that can be taken to prevent such injuries.

Understanding Clavicle Fractures

A clavicle fracture occurs when the bone is broken or cracked. It is a relatively common injury, accounting for about 5% of all fractures in adults. In runners, clavicle fractures often result from falls or direct blows to the shoulder area. The impact of a fall or collision can cause the clavicle to break, leading to pain, swelling, and limited mobility in the affected shoulder.

There are three main types of clavicle fractures:

  • Midshaft fractures: These fractures occur in the middle portion of the clavicle and are the most common type. They often result from a fall onto the shoulder or an outstretched arm.
  • Lateral fractures: Lateral fractures involve the outer end of the clavicle, near the shoulder joint. They are less common and usually caused by a direct blow to the shoulder.
  • Medial fractures: Medial fractures occur near the sternum, where the clavicle connects to the ribcage. They are rare and often associated with high-energy trauma, such as motor vehicle accidents.

Clavicle fractures can vary in severity, ranging from hairline cracks to complete breaks. The treatment for a clavicle fracture depends on the type and extent of the injury. In some cases, conservative measures such as immobilization and physical therapy may be sufficient for healing, while more severe fractures may require surgical intervention.

Causes of Clavicle Fractures in Runners

While clavicle fractures can occur in various situations, runners are particularly susceptible to these injuries due to the nature of their sport. The following are some common causes of clavicle fractures in runners:

1. Falls

One of the primary causes of clavicle fractures in runners is falls. Whether it’s tripping over an obstacle, losing balance on uneven terrain, or slipping on a wet surface, falls can result in significant impact on the shoulder area. When a runner lands on an outstretched arm or shoulder, the force can be transmitted to the clavicle, causing it to fracture.

For example, imagine a trail runner navigating a rocky path. If the runner trips and falls forward, the instinctive reaction is to extend the arms to break the fall. This can lead to a direct impact on the shoulder, potentially resulting in a clavicle fracture.

2. Collisions

Collisions with objects or other runners can also cause clavicle fractures in runners. In crowded races or group training sessions, there is an increased risk of accidental contact. A collision with another runner’s shoulder or elbow can generate enough force to break the clavicle.

Similarly, runners who participate in obstacle course races or trail running may encounter obstacles such as walls, ropes, or monkey bars. If a runner fails to clear an obstacle or loses grip, they may collide with the obstacle, leading to a clavicle fracture.

3. Overuse and Stress Fractures

Overuse injuries are common among runners, and the clavicle is not exempt from this risk. Continuous repetitive stress on the clavicle, such as the repetitive motion of the arms during running, can lead to stress fractures over time.

Stress fractures are small cracks in the bone that develop due to repetitive loading and inadequate rest. While stress fractures in the clavicle are relatively rare, they can occur in runners who engage in high-intensity training without proper recovery periods.

4. Underlying Medical Conditions

Some runners may be more prone to clavicle fractures due to underlying medical conditions. Conditions that weaken the bones, such as osteoporosis or osteopenia, can increase the risk of fractures even with minimal trauma.

Additionally, certain genetic disorders or hormonal imbalances can affect bone density and strength, making the clavicle more susceptible to fractures. Runners with these conditions should be aware of their increased risk and take appropriate precautions to prevent injuries.

Precautions to Prevent Clavicle Fractures

While it may not be possible to completely eliminate the risk of clavicle fractures in runners, there are several precautions that can be taken to reduce the likelihood of such injuries. By following these guidelines, runners can minimize the impact of falls, collisions, and overuse on the clavicle:

1. Strengthening Exercises

Engaging in regular strength training exercises can help improve the stability and strength of the shoulder muscles and surrounding structures. Strong muscles can better absorb impact and protect the clavicle from fractures.

Exercises that target the muscles of the shoulders, upper back, and chest can be beneficial for runners. Examples include push-ups, shoulder presses, rows, and lateral raises. It is important to perform these exercises with proper form and gradually increase the intensity to avoid overloading the muscles and joints.

2. Balance and Coordination Training

Improving balance and coordination can help runners maintain stability and reduce the risk of falls. Exercises such as single-leg balance, agility ladder drills, and proprioceptive training can enhance body awareness and control.

By enhancing balance and coordination, runners can react more effectively to unexpected situations, such as uneven terrain or sudden changes in direction, reducing the likelihood of falls and subsequent clavicle fractures.

3. Protective Gear

Wearing appropriate protective gear can provide an extra layer of protection for the clavicle and surrounding structures. For runners, this may include wearing a well-fitted sports bra or compression shirt that provides support to the upper body.

In addition, runners participating in high-risk activities such as obstacle course races or trail running may consider using protective gear specifically designed for these sports. For example, shoulder pads or chest protectors can help absorb impact and reduce the risk of clavicle fractures in the event of a fall or collision.

4. Proper Running Technique

Adopting a proper running technique can help minimize the stress on the clavicle and other vulnerable areas. Maintaining an upright posture, avoiding excessive arm swinging, and landing with a midfoot strike can help distribute forces more evenly throughout the body.

Runners should also be mindful of their running surface and choose routes that are free from hazards or obstacles that may increase the risk of falls or collisions.

5. Gradual Progression and Rest

Gradually increasing training intensity and volume can help prevent overuse injuries, including stress fractures in the clavicle. Runners should follow a structured training plan that includes adequate rest days and recovery periods.

It is important to listen to the body and pay attention to any signs of fatigue or pain. Pushing through excessive fatigue or ignoring persistent pain can increase the risk of injuries, including clavicle fractures.


Clavicle fractures are a common injury among runners, often resulting from falls, collisions, overuse, or underlying medical conditions. Understanding the causes of these fractures can help runners take appropriate precautions to prevent such injuries.

By incorporating strengthening exercises, balance and coordination training, wearing protective gear, adopting a proper running technique, and following a gradual progression with adequate rest, runners can reduce the risk of clavicle fractures.

While it may not be possible to completely eliminate the risk, taking these precautions can help runners enjoy their sport while minimizing the likelihood of clavicle fractures and other related injuries.

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