Document Detail


Affective responses to exercise are dependent on intensity rather than total work.
MedLine Citation:
PMID:  17762376     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
PURPOSE: The purpose of the study was to compare affective responses for two bouts of cycle ergometry with differing duration and intensity, but equal total work in kilocalories. METHODS: Thirty-seven participants (20 male, 17 female, mean age 23.9 yr) completed a multistage cycle ergometer protocol to determine ventilatory threshold (VT) and peak oxygen consumption (mean = 34.9 mL.kg(-1).min(-1)). Two cycling trials were prescribed: 30 min at 85% of VT (50.1% VO2 reserve) and an average of 24 min at 105% of VT (64.7% VO2 reserve). The length of the 105% of VT bout was adjusted to yield equal total work in each exercise trial. RESULTS: Using repeated-measures ANOVA, heart rate and exertion were significantly higher, and affective valence was significantly less positive (P < 0.01) for the higher-intensity, shorter-duration bout, with no differences in felt arousal (P > 0.05). Additionally, affective valence became less positive during the higher-intensity bout (P < 0.01) but not the lower-intensity bout (P > 0.05). CONCLUSION: These data extend previous findings by showing that the decline in ratings of pleasure during higher-intensity exercise is not dependent on differences in total caloric expenditure. Additionally, results from this study support continued promotion of prescriptions that focus on exercise intensity that does not exceed the VT.
Authors:
Marcus Kilpatrick; Robert Kraemer; John Bartholomew; Edmund Acevedo; Denise Jarreau
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Medicine and science in sports and exercise     Volume:  39     ISSN:  0195-9131     ISO Abbreviation:  Med Sci Sports Exerc     Publication Date:  2007 Aug 
Date Detail:
Created Date:  2007-08-31     Completed Date:  2007-10-30     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  8005433     Medline TA:  Med Sci Sports Exerc     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1417-22     Citation Subset:  IM; S    
Affiliation:
School of Physical Education and Exercise Science, University of South Florida, Tampa, FL 33620, USA. mkilpatrick@coedu.usf.edu
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MeSH Terms
Descriptor/Qualifier:
Adaptation, Physiological / physiology*
Adult
Anaerobic Threshold / physiology
Exercise Test*
Female
Humans
Male
Oxygen Consumption / physiology
Physical Exertion / physiology*
Southeastern United States

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


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