Document Detail


A hyperventilation theory of job stress and musculoskeletal disorders.
MedLine Citation:
PMID:  12071494     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
BACKGROUND: There is evidence of a link between job stress and upper extremity work-related musculoskeletal disorders. However, the biobehavioral mechanisms by which psychosocial stress factors contribute to the development of musculoskeletal disorders are uncertain. METHODS: Based on established principles of breathing and job stress and the relevant empirical literatures, a hyperventilation theory of job stress and work-related musculoskeletal disorders was developed. RESULTS: Hyperventilation (overbreathing) refers to a drop in arterial CO2 caused by ventilation that exceeds metabolic demands for O2. Excessive loss of CO2 (increase in rate of flow of CO2 from cells to longs) that results from hyperventilation produces a rise in blood pH (i.e., respiratory alkalosis). This disruption in the acid-base equilibrium triggers a chain of systemic physiological reactions that have adverse implications for musculoskeletal health, including increased muscle tension, muscle spasm, amplified response to catecholamines, and muscle ischemia and hypoxia. Hyperventilation is often characterized by a shift from a diaphragmatic to a thoracic breathing pattern, which imposes biomechanical stress on the neck/shoulder region due to the ancillary recruitment of sternocelidomastoid, scalene, and trapezius muscles in support of thoraci breathing. CONCLUSIONS: A hyperventilation theory provides an innovative framework for understanding how job stress contributes to pathophysiological processes that increase the risk of work-related musculoskeletal disorders. With respect to the control of these disorders, a hyperventilation theory has important implications for establishing effective work organization interventions and individual stress-management methods. In this regard, breathing is a biobehavioral metric for assessing whether psychosocial aspects of work organization are in balance with a worker's needs and resources. A hyperventilation theory also provides a unique rationale for coping with job stress and musculoskeletal discomfort through breathing training, light physical exercise, and rest breaks.
Authors:
Lawrence M Schleifer; Ronald Ley; Thomas W Spalding
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  American journal of industrial medicine     Volume:  41     ISSN:  0271-3586     ISO Abbreviation:  Am. J. Ind. Med.     Publication Date:  2002 May 
Date Detail:
Created Date:  2002-06-19     Completed Date:  2002-10-30     Revised Date:  2006-02-27    
Medline Journal Info:
Nlm Unique ID:  8101110     Medline TA:  Am J Ind Med     Country:  United States    
Other Details:
Languages:  eng     Pagination:  420-32     Citation Subset:  IM    
Affiliation:
Department of Kinesiology, University of Maryland, College Park 20742, USA. LMS1950@MSN.COM
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MeSH Terms
Descriptor/Qualifier:
Arm Injuries / physiopathology*,  psychology
Arousal / physiology
Cumulative Trauma Disorders / physiopathology*,  psychology
Humans
Hyperventilation / physiopathology*,  psychology
Muscle, Skeletal / physiopathology
Neuromuscular Diseases / physiopathology*,  psychology
Occupational Diseases / physiopathology*,  psychology
Risk Factors
Stress, Psychological / complications*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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