| Pacing pattern and physiological responses to a 5-minute maximal exercise bout. | |
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MedLine Citation:
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PMID: 18714224 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The purpose of this study was to describe the pacing strategy of experienced cyclists in a 5-minute maximal exercise bout and to describe selected physiological responses associated with this effort. Six experienced and well-trained competitive cyclists (five males, one female) with a mean (+/-SD) age, height, and mass of 27.0 +/- 4.77 years, 174.7 +/- 8.57 cm, and 71.0 +/- 6.45 kg, performed a 5-minute maximal exercise bout in a laboratory on a racing cycle. Subjects were free to determine their work rate throughout. During exercise, data were collected for work rate, heart rate (HR), [latin capital V with dot above]O2, electromyography of the rectus femoris and vastus lateralis, oxygen saturation, and rating of perceived exertion. All six subjects selected a pacing strategy characterized by a surge in work rate in the first minute followed by a gradual decline until the last minute, when a sprint to the end occurred. Values for HR, respiratory exchange ratio, and blood lactate concentration (182.8 +/- 2.8 bpm, 1.08 +/- 0.07, and 15.5 +/- 2.1 mmol x L-1, respectively) indicated that [latin capital V with dot above]O2 (3.6 +/- 0.4 L x min-1) was close to or at maximum from minutes 2 to 5. Oxygen saturation dropped continuously across time, reaching <94% in the last minute, and rating of perceived exertion was 19.5 +/- 0.8. Electromyographic activity of the rectus femoris and vastus lateralis was not significantly related to work rate during the bout (p > 0.05). It is concluded that work rate or pace is uneven in an all-out, 5-minute exercise bout in experienced cyclists, yet the physiological responses are near maximal in minutes 2-5. Cyclists seem to pace themselves in a common pattern in short-term stochastic exercise bouts. The possible benefits of including some stochastic exercise in the training programs of athletes might be worthy of examination. |
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Authors:
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Kris E Berg; Christopher L Kauftman; Dimitris C Katsavelis; Kelli L Ratliff; Joey L Simet |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Journal of strength and conditioning research / National Strength & Conditioning Association Volume: 22 ISSN: 1533-4287 ISO Abbreviation: J Strength Cond Res Publication Date: 2008 Sep |
Date Detail:
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Created Date: 2008-09-01 Completed Date: 2009-02-10 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9415084 Medline TA: J Strength Cond Res Country: United States |
Other Details:
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Languages: eng Pagination: 1610-6 Citation Subset: IM |
Affiliation:
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School of Health, Physical Education and Recreation, University of Nebraska at Omaha, USA. kberg@mail.unomaha.edu |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adaptation, Physiological* Adult Analysis of Variance Bicycling / physiology* Electromyography Exercise Test Female Heart Rate / physiology Humans Male Time Factors |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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