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PHYSIOLOGICAL RESPONSES TO AN ACUTE BOUT OF SPRINT INTERVAL CYCLING.
MedLine Citation:
PMID:  23302749     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
ABSTRACT: Sprint interval training has been shown to improve skeletal muscle oxidative capacity, maximal oxygen uptake and health outcomes. However, the acute physiological responses to 4-7 maximal effort intervals have not been determined. To determine the oxygen uptake, cardiorespiratory responses, and energy expenditure during an acute bout of sprint interval cycling (SIC),healthy, college-aged subjects, 6 men and 6 women, completed 2 SIC sessions with at least 7 d between trials. SIC was performed on a cycle ergometer and involved a 5-min warm-up followed by four 30-s all-out sprints with 4-min active recovery. Peak oxygen uptake (ml/kg/min) during the 4 sprints was 35.3 ± 8.2, 38.8 ± 10.1, 38.8 ± 10.6, and 36.8 ± 9.3 and peak heart rate (bpm) was 164 ± 17, 172 ± 10, 177 ± 12, and 175 ± 22. We conclude an acute bout of SIC elicits submaximal oxygen uptake and cardiorespiratory responses during each interval that are above 80% of estimated maximal values. Although the duration of exercise in SIC is very short, the high level of oxygen uptake and cardiorespiratory responses are sufficient to potentially elicit adaptations to training associated with elevated aerobic energy demand.
Authors:
Eric C Freese; Nicholas H Gist; Kirk J Cureton
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-1-8
Journal Detail:
Title:  Journal of strength and conditioning research / National Strength & Conditioning Association     Volume:  -     ISSN:  1533-4287     ISO Abbreviation:  J Strength Cond Res     Publication Date:  2013 Jan 
Date Detail:
Created Date:  2013-1-10     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9415084     Medline TA:  J Strength Cond Res     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
Metabolism and Body Composition Laboratory, Department of Kinesiology, University of Georgia, Athens, GA 30602.
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