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The trapezius muscle, commonly referred to as traps or trap muscles, is a large, flat, paired muscle that extends from the base of the neck, across the shoulders, and down to the middle of the back. It is divided into three sections: upper, middle, and lower. The trapezius muscle is involved in various movements, including those of the head, neck, and upper back, as well as maintaining posture and stabilizing the spine. The muscle is also responsible for scapular movement and rotation, working in conjunction with other muscles such as the rhomboids and levator scapulae. While it is less common to injure the trapezius muscle compared to other muscles, it can still be susceptible to pain and tension, especially with overuse or in individuals with chronic stress or anxiety.
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What You'll Learn
Traps are a large muscle group
The trapezius muscles, commonly referred to as "traps" or "trap muscles", are two large muscles found on either side of the upper back. They are broad, flat, and superficial, extending from the base of the neck, across the shoulders, and down to the middle of the back. The trapezius is a large muscle group that covers a significant area of the upper back, making it noticeable when developed through exercise.
The trapezius muscle has three sections: upper (superior), middle, and lower (inferior). These sections work together to produce coordinated movements and maintain posture. The upper fibres elevate the scapulae, the middle fibres retract them, and the lower fibres depress them. The trapezius also induces scapular rotation, allowing us to raise our arms above our heads.
The trapezius is involved in various functions, including moving the head, neck, upper back, and shoulder. It assists in abduction of the shoulder by rotating the glenoid upward and helps maintain posture by stabilising the spine. The muscle is also responsible for side bending and turning the head, elevating and depressing the shoulders, and internally rotating the arm.
Trapezius muscles are commonly affected by overuse, injuries, and nerve damage, which can lead to pain and tension. To alleviate this, individuals can perform self-myofascial release, active release therapy, stretching, and massage. Additionally, opening up the chest, shoulders, and biceps can help reduce tension in the trapezius muscles.
To strengthen and develop the trapezius muscle, specific exercises such as shrugs and deadlifts are recommended. These exercises target the traps and allow for a full range of motion, helping to build mass, strength, and endurance in this muscle group.
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Traps help with posture and movement
The trapezius muscles, commonly referred to as "traps" or "trap muscles", are two large muscles found on either side of the upper back. They are essential for maintaining and adjusting posture, including standing up straight or bending the upper back forward. The traps also enable various movements, such as:
- Turning the head to either side
- Twisting the torso
- Shrugging or pulling back the shoulders
- Lifting the arm or throwing something—the trapezius pushes on the shoulder blade (scapula) to facilitate this movement
- Moving the head, neck, and upper back
The trapezius muscles are large, paired trapezoid-shaped surface muscles that extend from the occipital bone to the lower thoracic vertebrae of the spine and laterally to the spine of the scapula. They are responsible for moving and stabilising the scapula, with the upper fibres elevating the scapulae, the middle fibres retracting them, and the lower fibres depressing them.
The traps also play a crucial role in scapular rotation. For instance, the upper and lower fibres rotate the scapula around the sternoclavicular articulation, resulting in upward movement of the acromion and inferior angles and downward movement of the medial border. Additionally, the trapezius assists in abduction of the shoulder by rotating the glenoid upward.
Furthermore, the trapezius muscles work in conjunction with other muscles to produce coordinated movements. For example, the rhomboids (major and minor) collaborate with the trapezius to retract and stabilise the scapula, contributing to shoulder movement and posture. Similarly, the serratus anterior muscle works with the lower trapezius to rotate the scapula upward during arm elevation, ensuring smooth and efficient shoulder movement.
In summary, the trapezius muscles are large, powerful muscles that play a vital role in maintaining posture and facilitating various movements of the head, neck, and upper back. They work in coordination with other muscles to enable a full range of motion and ensure smooth and controlled movements.
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Traps are commonly injured
The trapezius muscles are two big muscles found on either side of the upper back. They are commonly referred to as "traps" or "trap muscles". These muscles are used a lot throughout the day to help with various motions, including moving the head, neck, and upper back, as well as maintaining and adjusting posture.
While it is less common for the trapezius muscles to be injured compared to other muscles, they can still be injured or irritated. Overuse, injuries, and nerve damage are the most common causes of trapezius muscle pain. Poor posture can also cause trapezius pain, as slouching forward a lot at a desk or while sitting on the couch can put extra tension on the traps and other upper back muscles. Stress can also cause trapezius pain, as people may unconsciously squeeze their muscles when stressed, and the shoulders, upper back, and neck are especially susceptible to this tension.
Trapezius muscle pain can also be caused by physical trauma, such as a muscle tear, or a pinched nerve in the spine. In addition, dysfunction of the trapezius can result in winged scapula, or abnormal mobility or function of the scapula (scapular dyskinesia). This can be caused by trapezius palsy, which is due to damage to the spinal accessory nerve, and can result in a drooping shoulder and shoulder and neck pain.
Treatment for trapezius pain depends on the cause but usually involves resting the muscle and avoiding painful activities. Both hot and cold therapy can reduce muscle pain and inflammation, and home remedies such as over-the-counter pain relievers and topical creams may also help.
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Traps can be strengthened with exercises
The trapezius muscles are two large muscles found on either side of the upper back. They are commonly referred to as "traps" or "trap muscles". These muscles are used a lot throughout the day and help with various motions, including moving the head, neck, upper back, and adjusting your posture.
Other exercises that can help strengthen the traps include raising the arm overhead in line with the LT muscle fibers, which has been found to produce high MVIC (maximal EMG activity). The upper trapezius can also be targeted with a single-arm shoulder shrug. Additionally, exercises with a good UT:MT ratio, such as scapular retraction, can be beneficial as the UT often compensates for a weak MT or LT.
It is important to note that maintaining proper posture is crucial for healthy traps. When the shoulders, chest, and biceps are held in a forward and "shortened" position, the traps have to work harder to correct this, leading to unnecessary tension and strain. To alleviate this tension, self-myofascial release, active release therapy, stretching, and massage are often recommended.
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Traps are involved in scapular movement
The trapezius muscles are two large muscles found in the upper back, one on each side. They are commonly referred to as "traps" or "trap muscles". These muscles are involved in several functions, including scapular movement.
The trapezius muscles play a crucial role in maintaining and adjusting posture, as well as moving the head, neck, and upper back. They are also responsible for scapular movement and stability. The upper fibres of the trapezius elevate the scapulae, while the middle fibres retract them, and the lower fibres depress the scapulae. This muscle group also induces scapular rotation, with the upper and lower fibres rotating the scapula around the sternoclavicular articulation, resulting in upward rotation.
The trapezius muscles work in conjunction with other muscles to ensure smooth and efficient scapular and shoulder movements. For example, the levator scapulae works with the upper trapezius to lift and rotate the shoulder, as well as to downwardly rotate the scapula. The serratus anterior and lower trapezius muscles contribute to the upward rotation force couple, producing acromial elevation. Additionally, the pectoralis minor assists the trapezius in stabilising the scapula by drawing it forward and downward against the thoracic wall.
The trapezius muscles are essential for various physical activities. For instance, during actions such as pulling, rowing, or swimming, the latissimus dorsi works with the lower trapezius to assist in downward rotation of the scapula. Furthermore, the supraspinatus and upper trapezius initiate the first 15 degrees of shoulder abduction, providing the necessary lift for arm elevation.
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Frequently asked questions
Traps, or trap muscles, are the common names for the trapezius muscles, which are two large muscles found on either side of the upper back.
The trapezius muscles help with neck, head, shoulder, and torso movements, as well as stabilising the spine and maintaining proper posture.
Pain in the back, neck, or the back of the head that lasts for more than a week could be a sign of trapezius muscle pain.
Exercises that target the trapezius muscles include deadlifts, barbell or dumbbell shrugs, and shoulder shrugs.
