None listed
Conditions
Brief summary
Shoulder disorders is a debilitating condition impacting daily living activities. Shoulder exercises are currently recommended at early stages of rehabilitation. Recent studies, however, suggest little evidence for shoulder exercise as an effective intervention for improving function and reducing pain. Before designing and testing new interventions for shoulder disorders, it is important to identify whether these exercises optimize shoulder muscle activity. This study aims to quantify shoulder muscle activity during selected shoulder exercises.
Interventions
Electromyography
Wireless surface electromyography (EMG) electrodes will be placed on three rotator cuff muscles (supraspinatus, infraspinatus), deltoid (anterior, middle and posterior heads), pectoralis major, and latissimus dorsi muscles according to the Surface Electromyography for the Non-Invasive Assessment of Muscles (SENIAM) guidelines.. Prior to electrode placement, the skin area will be shaved and cleaned with an alcohol swab. EMG data will be sampled at 1000 Hz. Prior to performing the
Electromyography Wireless surface electromyography (EMG) electrodes will be placed on three rotator cuff muscles (supraspinatus, infraspinatus), deltoid (anterior, middle and posterior heads), pectoralis major, and latissimus dorsi muscles according to the Surface Electromyography for the Non-Invasive Assessment of Muscles (SENIAM) guidelines.. Prior to electrode placement, the skin area will be shaved and cleaned with an alcohol swab. EMG data will be sampled at 1000 Hz. Prior to performing the shoulder exercises, the maximal voluntary contraction will be tested for each of the analysed muscles, following the SENIAM guidelines. Procedures Data collection will last for 45 min. Shoulder muscle activity levels were monitored with the EMG while participants performed the exercises. Firstly, participants will be screened for shoulder disorders. Then, participants’ age, height and weight will be recorded. Next, participants will be asked to perform 10 repetitions for each the two shoulder exercises: (1) the relocation shoulder exercise; (2) shoulder external rotation. The relocation exercise The researcher gently pulls the arm longitudinally, while the patient is requested to counter-act this by pulling the arm back. The patient sustains an isometric contraction for 3 seconds. Shoulder external rotation This exercise consists of rotating the shoulder laterally, while side-lying with a flexed elbow with the arm close to the trunk. This exercise has been shown to encourage recruitment of shoulder external rotator muscles, including Infraspinatus and Supraspinatus.
Sponsors
University of Otago
Eligibility
Sex/Gender
All
Age
18 Years to 65 Years
Healthy volunteers
Yes
Inclusion criteria
Participants will be included if they present no current neck and shoulder injuries.
Exclusion criteria
Participants will be excluded if they present any positive response to the cervical and shoulder screening tests.
Outcome results
None listed