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Effects of Pacing Strategy on Work Done above Critical Power during High-Intensity Exercise.
MedLine Citation:
PMID:  23377832     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
PURPOSE: We investigated the influence of pacing strategy on the work completed above critical power (CP) prior to exhaustion (W>CP) and the peak V˙o2 attained during high-intensity cycling. METHODS: Following determination of V˙o2max from a ramp incremental cycling test (INC) and estimation of the parameters of the power-duration relationship for high-intensity exercise (i.e., CP and W´) from a 3-min all-out cycling test (AOT), eight male subjects completed a cycle test to exhaustion at a severe-intensity constant-work-rate estimated to result in exhaustion in 3 min (CWR) and a self-paced 3-min cycling time trial (SPT). RESULTS: V˙o2max determined from INC was 4.24 ± 0.69 L·min and CP and W' estimated from AOT were 260 ± 60 W and 16.5 ± 4.0 kJ, respectively. W>CP during SPT was not significantly different from W>CP during CWR (15.3 ± 5.6 and 16.6 ± 7.4 kJ, respectively) and these values were also similar to W>CP during INC (16.4 ± 4.0 kJ) and W' estimated from AOT. The peak V˙o2 during SPT was not significantly different from peak V˙o2 during CWR (4.20 ± 0.77 and 4.14 ± 0.75 L·min, respectively) and these values were similar to the V˙o2max determined from INC and the peak V˙o2 during AOT (4.10 ± 0.79 L·min). CONCLUSIONS: Exhaustion during high-intensity exercise coincides with achievement of the same peak V˙o2 (V˙o2max) and completion of the same W>CP, irrespective of the work rate forcing function (INC or CWR) or pacing strategy (enforced-pace or self-paced). These findings indicate that exhaustion during high-intensity exercise is based on highly predictable physiological processes which are unaffected when pacing strategy is self-selected.
Authors:
Weerapong Chidnok; Fred J Dimenna; Stephen J Bailey; Daryl P Wilkerson; Anni Vanhatalo; Andrew M Jones
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-1-30
Journal Detail:
Title:  Medicine and science in sports and exercise     Volume:  -     ISSN:  1530-0315     ISO Abbreviation:  Med Sci Sports Exerc     Publication Date:  2013 Jan 
Date Detail:
Created Date:  2013-2-4     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8005433     Medline TA:  Med Sci Sports Exerc     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
1 Sport and Health Sciences, College of Life and Environmental Sciences, St. Luke's Campus, University of Exeter, Heavitree Road, Exeter, Devon, England, UNITED KINGDOM; 2 Human Performance Laboratory, Health Studies, Physical Education and Human Performance Sciences, Adelphi University, Garden City, New York, UNITED STATES; and 3 Teachers College, Department of Biobehavioral Sciences, Columbia University, New York, New York, UNITED STATES.
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