[Purpose] This study investigated the effect of sleep posture on neck muscle activity. [Subjects and Methods] The study recruited 20 healthy subjects, who were positioned in three supine sleeping positions: both hands at sides, both hands on the chest, and dominant hand on the forehead. The activities of the scalene and upper trapezius muscles bilaterally were measured by surface electromyograp...

The goal of the present article is to compare neuromuscular activation patterns among medial-lateral, superior-inferior, and rotational positions palms for 14 selective muscles during push-up exercise. Muscle activity kinematics information fifteen males (68.35 ± 7.18 kg, 175 3.40 cm, 24.50 7.50 years) were recorded by Myon Electromyographic (EMG) system Vicon motion capture, respectively. EMG ...

BACKGROUND AND PURPOSE Scapular muscle performance evaluated with a handheld dynamometer (HHD) has been investigated only in people without shoulder dysfunction for test-retest reliability of data obtained with a single scapular muscle test. The purpose of this study was to assess the reliability, error, and validity of data obtained with an HHD for 4 scapular muscle tests in subjects with shou...

BACKGROUND Strengthening exercises for the scapular muscles are used in the treatment of scapulothoracic dysfunction related to shoulder injury. In view of the intermuscular and intramuscular imbalances often established in these patients, exercises promoting lower trapezius (LT), middle trapezius (MT), and serratus anterior (SA) activation with minimal activity in the upper trapezius (UT) are ...

Pain and tenderness of the upper trapezius muscle is frequent in several occupational groups. The objective of this study is to investigate the effect of three contrasting interventions on muscle function and pain in women with trapezius myalgia. A group of employed women (n = 42) with a clinical diagnosis of trapezius myalgia participated in a 10-wk randomized controlled intervention: specific...

CONTEXT Handheld dynamometry (HHD) is considered an objective method of measuring strength, but the reliability of the procedure can be compromised by inadequate tester strength and insufficient stabilization of the dynamometer especially, for the scapular muscles. OBJECTIVE Primarily, to determine the intrarater reliability of HHD when testing shoulder and scapular muscle strength, and secon...

Work-related chronic neck pain is a growing disorder in the United States that accounts for approximately 60% of all occupational disabling injuries [1]. Neck pain is linked to continuous and excessive activation in the upper trapezius (UT) muscle [2]. An effective treatment for chronic neck pain may be to reduce activation in the UT through an inferior shift in the muscle activity to the middl...

Introduction: laptop bag may be a contributing factor for musculoskeletal complaints in schoolchildren. Several studies have reported an association between carrying heavily loaded schoolbags and musculoskeletal pain or discomfort. Methods: 105 collegiate students were conveniently recruited in this study. Electromyography (EMG) signals were recorded during the treadmill walking at a speed of 4...

[Purpose] The purpose of this study was to compare the upper, middle, and lower trapezius muscles' activity in the different planes of shoulder elevation. [Subjects] Twenty male subjects volunteered for this study. [Methods] Surface electromyographic (EMG) activity for each of the three regions of the trapezius muscles in the three different planes of elevation were collected while the particip...