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The Effect of Work-Related Sustained Trapezius Muscle Activity on the Development of Neck and Shoulder Pain among Young Adults
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The Effect of Work-Related Sustained Trapezius Muscle Activity on the Development of Neck and Shoulder Pain among Young Adults
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Journal Article
The Effect of Work-Related Sustained Trapezius Muscle Activity on the Development of Neck and Shoulder Pain among Young Adults
2013
Overview
Objective This study aimed to evaluate if sustained trapezius muscle activity predicts neck and shoulder pain over a 2.5-year period.
Methods Forty young adults (15 hairdressers, 14 electricians, 5 students and 6 with various work) were followed during their first years of working life. Self-reported neck and shoulder pain during the last four weeks was assessed seven times over the observational period. Upper-trapezius muscle activity was measured during a full working day by bilateral surface electromyography (EMG) at baseline (winter 2006/7). Sustained trapezius muscle activity was defined as continuous muscle activity with amplitude >0.5% EMG
max
lasting >4 minutes. The relative time of sustained muscle activity during the working day was calculated and further classified into low (0—29%), moderate (30—49%) and high (50—100%) level groups.
Results Generalized estimating equations (GEE), adjusted for time, gender, mechanical workload, control-over-work intensity, physical activity, tobacco use, and prior neck and shoulder pain, showed that participants with a high level of sustained muscle activity had a rate of neck and shoulder pain three times higher than the low level group during a 2.5-year period. The association was strongest at the same time and shortly after the EMG measurement, indicating a time-lag of ≤6 months. Conclusion The results support the hypothesis that sustained trapezius muscle activity is associated with neck and shoulder pain. This association was strongest analyzing cross-sectional and short-term effects.
Publisher
Scandinavian Journal of Work, Environment ＆ Health,Finnish Institute of Occupational Health,National Institute of Occupational Health,National Research Centre for the Working Environment,Scandinavian journal of work, environment & health,Scandinavian Journal of Work, Environment & Health,Nordic Association of Occupational Safety and Health (NOROSH)
Subject
/ Adults
/ Biological and medical sciences
/ Diseases of the osteoarticular system
/ emg
/ Exercise
/ Female
/ Humans
/ Male
/ Miscellaneous. Osteoarticular involvement in other diseases
/ Neck
/ Pain
/ Public health. Hygiene-occupational medicine
/ Shoulder
/ Shoulder Pain - physiopathology
/ Students
/ Superficial Back Muscles - physiopathology
/ sustained trapezius muscle activity
/ Time
/ Time use
/ Tobacco
/ Workers
/ workload
