Status: RecruitingKendall Exercises With and Without Positional Release Therapy in Upper Crossed Syndrome
Upper Cross Syndrome (UCS) is a prevalent musculoskeletal disorder characterized by a specific pattern of muscular imbalance and postural dysfunction. This condition arises from prolonged poor posture. The resulting imbalance often manifests as visible postural changes, including rounded shoulders, forward head posture, and increased thoracic kyphosis. UCS is characterized by tightness and weakness of the neck, shoulders, and upper back muscles that cross between the dorsal and the ventral sides of the body. Postural abnormalities associated with UCS include a forward head posture (FHP), cervical lordosis, thoracic hyper kyphosis, protracted and elevated shoulders (round shoulders), and scapular winging with increased internal rotation and abduction.
In UCS, neck and chest muscles, such as the sternocleidomastoid (SCM), levator scapulae, Pectoralis major and minor, Scalenes, and Upper Trapezius (UT), are tightened or shortened, whereas muscles of the neck and posterior upper back, such as the Deep Neck Flexors (DNFs), Serratus Anterior (SA), Rhomboids, Middle Trapezius (MT), and Lower Trapezius (LT), are weakened, stretched, and restrained. Opposite-group muscle imbalances in UCS bring postural disturbances, misalignments in the upper limbs, and atlanto-occipital, cervicothoracic, and glenohumeral joint dysfunction. The muscular imbalances may also lead to various musculoskeletal symptoms, such as headaches, neck pain, chest pain, upper back pain, tingling in the upper arms, or a limited range of motion in the neck or shoulders.
The alteration in scapula muscles in UCS affects the movement of the scapula, which acts as a bridge and provides mobility and stability to the shoulders and neck. A proper posture is necessary for optimal functional performance in daily activities. The awkward positions put constant pressure on the joints, and degenerative changes in joints progress rapidly when exposed to sustained pressure, causing muscle imbalances and pain. If a muscle imbalance continues and progresses, this may lead to altered movement patterns and joint damage, creating further dysfunction.
The main risk factor for developing UCS is maintaining an abnormal posture for a prolonged duration. Some daily activities that involve bad postures are often occupation-related. Repetitive tasks or continuous work for long hours can aggravate postural deviations. For example, patients with improper postures are more prone to musculoskeletal injuries after handling or lifting heavy objects than others with a proper posture. Musculoskeletal pain, most commonly neck pain, may present as the main symptom of UCS. Musculoskeletal pain may increase in relation to standing continuously or improperly sitting for long hours.