| Blood lactate removal during recovery at various intensities below the individual anaerobic threshold in triathletes. | |
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MedLine Citation:
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PMID: 16446676 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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AIM: Optimal lactate removal was reported to occur at work-rate between 30% and 70% VO2max. However, it has been recently recommended to quantify exercise intensity not in percentage of VO2max but in relation to validated metabolic reference points such as the individual anaerobic threshold (IAT) and the individual ventilatory threshold (IVT). The purpose of this study was to examine the effect on lactate removal of different recovery work-rates below the IAT defined calculating the difference (DT) between IAT and IVT, then choosing the IVT+50%DT, the IVT and the IVT-50%DT work-rates. METHODS: Eight male triathletes (VO2max 69.7+/-4.7, VO2IAT 52.9+/-4, VO2IVT 41.1+/-4.7 mL x kg(-1) x min(-1)), after a 6-min treadmill run at 75% of difference between IAT and VO2max, performed in a random order the following 30-min recovery treatments: 1) run at IVT(plus;50%DT), 2) at IVT, 3) at IVT(-50%DT), 4) passive. Blood lactate was measured at 1, 3, 6, 9, 12, 15, 20, 25, 30 minutes of recovery. RESULTS: All active recovery work-rates (from 50+/-5% to 67+/-4% VO2max) were within the range previously reported for optimal lactate removal, and significantly more efficient than passive recovery on lactate removal curve (% of accumulated lactate above rest value). However, significant differences (P<0.01) were found among active recovery intensities: the IVT(-50%DT) was the most efficient work-rate from the 9th minute to 30th minute. CONCLUSIONS: In triathletes, the IVT(-50%DT) was the optimal work-rate for lactate removal; moreover none of the studied active work-rate showed further lactate decrease after the 20th minute of recovery. |
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Authors:
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C Baldari; M Videira; F Madeira; J Sergio; L Guidetti |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: The Journal of sports medicine and physical fitness Volume: 45 ISSN: 0022-4707 ISO Abbreviation: J Sports Med Phys Fitness Publication Date: 2005 Dec |
Date Detail:
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Created Date: 2006-01-31 Completed Date: 2006-05-22 Revised Date: 2008-11-21 |
Medline Journal Info:
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Nlm Unique ID: 0376337 Medline TA: J Sports Med Phys Fitness Country: Italy |
Other Details:
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Languages: eng Pagination: 460-6 Citation Subset: IM |
Affiliation:
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University Institute of Motor Sciences (IUSM), Rome, Italy. baldari@iusm.it |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Acid-Base Equilibrium
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physiology Adult Anaerobic Threshold / physiology* Bicycling / physiology Exercise Test Heart Rate / physiology Humans Lactic Acid / blood* Male Oxygen Consumption / physiology* Physical Endurance / physiology* Physical Exertion / physiology* Pulmonary Gas Exchange Pulmonary Ventilation / physiology Running / physiology Sports / physiology* Swimming / physiology Time Factors |
| Chemical | |
Reg. No./Substance:
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50-21-5/Lactic Acid |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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