| Two Minutes of Sprint Interval Exercise Elicits Similar 24 hour VO2 as 30 Minutes of Continuous Endurance Exercise. | |
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MedLine Citation:
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PMID: 22710610 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Six weeks (3 times wk) of sprint interval (SIT) or continuous endurance training (CET) both promote body fat losses despite a substantially lower training volume with SIT (MacPherson, Hazell, Olver, Paterson, & Lemon, 2011). In an attempt to explain these findings we quantified VO2 during and following (24 h) sprint interval exercise (SIE; 2 min exercise) vs continuous endurance exercise (CEE; 30 min exercise). VO2 was measured in male students (n=8) at 8 time points over 24 h under three treatments (SIE, CEE, and control [CTRL, no exercise]). Diet was controlled. VO2 was 150% greater (P<0.01) during CEE vs SIE (87.6±13.1 vs 35.1±4.4 L O2; mean±SD). The observed small difference between average exercise heart rates with CEE (157±10 bpm) and SIE (149±6 bpm) approached significance (P=0.06) as did the difference in peak heart rates during CEE (166±10 bpm) and SIE (173±6 bpm; P=0.14). Total O2 (L O2) consumed over 8 h with CEE (263.3±30.2) was greater (P<0.01) vs both SIE (224.2±15.3; P<0.001) and CTRL (163.5±16.1; P<0.001). Total O2 with SIE was also increased over CTRL (P<0.001). At 24 h, both exercise treatments were increased (P<0.001) vs CTRL (CEE= 500.2±49.2; SIE = 498.0±29.4; CTRL = 400.2±44.6) but there was no difference between CEE and SIE (P=0.99). Despite large differences in exercise O2 consumption, the protracted effects of SIE result in a similar total O2 consumption over 24 h vs CEE indicating that the significant body fat losses observed previously with SIT are partially due to increases in metabolism post-exercise. |
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Authors:
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Tom J Hazell; T Dylan Olver; Craig D Hamilton; W R Lemon P |
Publication Detail:
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Type: JOURNAL ARTICLE Date: 2012-6-15 |
Journal Detail:
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Title: International journal of sport nutrition and exercise metabolism Volume: - ISSN: 1543-2742 ISO Abbreviation: - Publication Date: 2012 Jun |
Date Detail:
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Created Date: 2012-6-19 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 100939812 Medline TA: Int J Sport Nutr Exerc Metab Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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The University of Western Ontario, Exercise Nutrition Research Laboratory, School of Kinesiology, Faculty of Health Sciences, London, Ontario, Canada. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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