Document Detail

Stress hormones, effort sense, and perceptions of stress during incremental exercise: an exploratory investigation.
MedLine Citation:
PMID:  17313283     Owner:  NLM     Status:  MEDLINE    
Exercise elicits intensity-dependent increases in epinephrine (Epi), norepinephrine (NE), cortisol (CORT), and lactate (Lac), whereas at rest the hormonal responses to mental stress include increases in Epi, NE, and CORT, but not Lac. Additionally, elevations in CORT at rest are associated with negative affect. Finally, as exercise intensity increases, perceptions of effort (RPE) increase and affect becomes more negative. The purpose of this study was to examine the responses of Epi, NE, CORT, Lac, RPE, and affect during incremental increases in exercise to maximum. Seven highly-trained male runners completed a discontinuous treadmill protocol that included 10 minutes at 60%, 10 minutes at 75%, 5 minutes at 90%, and 2 minutes at 100% of VO2max. Blood samples were collected through an intravenous catheter before, during, and following exercise during the experimental condition, and during a time-matched control condition. RPE and affect were assessed just prior to each blood draw. The Epi, NE, CORT, and Lac displayed the expected incremental increases, however affect became more negative at higher exercise intensities, and RPE increased as exercise intensity increased. Data suggest that CORT follows the same pattern of response to graded exercise as affect. Since perceptual and affective responses to exercise are associated with motivation, these documented negative affective shifts during exercise should be considered in order to develop strategies that lead to enhanced exercise adherence and performance.
Edmund O Acevedo; Robert R Kraemer; Gary H Kamimori; Robert J Durand; Lisa G Johnson; V Daniel Castracane
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of strength and conditioning research / National Strength & Conditioning Association     Volume:  21     ISSN:  1064-8011     ISO Abbreviation:  J Strength Cond Res     Publication Date:  2007 Feb 
Date Detail:
Created Date:  2007-02-22     Completed Date:  2007-04-26     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9415084     Medline TA:  J Strength Cond Res     Country:  United States    
Other Details:
Languages:  eng     Pagination:  283-8     Citation Subset:  IM; S    
Department of Health and Human Performance, Virginia Commonwealth University, Richmond 23284, USA.
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MeSH Terms
Affect / physiology
Analysis of Variance
Area Under Curve
Biological Markers / blood*
Epinephrine / blood
Exercise / physiology*,  psychology
Hydrocortisone / blood
Lactates / blood
Norepinephrine / blood
Perception / physiology
Running / physiology
Stress, Psychological / physiopathology*
Reg. No./Substance:
0/Biological Markers; 0/Lactates; 50-23-7/Hydrocortisone; 51-41-2/Norepinephrine; 51-43-4/Epinephrine

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

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