| Maximal lactate steady state in trained adolescent runners. | |
| | |
MedLine Citation:
|
PMID: 14998099 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
The aims of this study were: (1) to identify the exercise intensity that corresponds to the maximal lactate steady state in adolescent endurance-trained runners; (2) to identify any differences between the sexes; and (3) to compare the maximal lactate steady state with commonly cited fixed blood lactate reference parameters. Sixteen boys and nine girls volunteered to participate in the study. They were first tested using a stepwise incremental treadmill protocol to establish the blood lactate profile and peak oxygen uptake (VO2). Running speeds corresponding to fixed whole blood lactate concentrations of 2.0, 2.5 and 4.0 mmol x l(-1) were calculated using linear interpolation. The maximal lactate steady state was determined from four separate 20-min constant-speed treadmill runs. The maximal lactate steady state was defined as the fastest running speed, to the nearest 0.5 km x h(-1), where the change in blood lactate concentration between 10 and 20 min was < 0.5 mmol x l(-1). Although the boys had to run faster than the girls to elicit the maximal lactate steady state (15.7 vs 14.3 km x h(-1), P < 0.01), once the data were expressed relative to percent peak VO2 (85 and 85%, respectively) and percent peak heart rate (92 and 94%, respectively), there were no differences between the sexes (P > 0.05). The running speed and percent peak VO2 at the maximal lactate steady state were not different to those corresponding to the fixed blood lactate concentrations of 2.0 and 2.5 mmol x l(-1) (P > 0.05), but were both lower than those at the 4.0 mmol x l(-1) concentration (P < 0.05). In conclusion, the maximal lactate steady state corresponded to a similar relative exercise intensity as that reported in adult athletes. The running speed, percent peak VO2 and percent peak heart rate at the maximal lactate steady state are approximated by the fixed blood lactate concentration of 2.5 mmol x l(-1) measured during an incremental treadmill test in boys and girls. |
| | |
Authors:
|
Omar Ali Almarwaey; Andrew Mark Jones; Keith Tolfrey |
Related Documents
:
|
2920719 - Influence of cold exposure on blood lactate response during incremental exercise. 8899529 - Kidney function and nitrogen balance of high yielding dairy cows at the onset of lactat... 10775469 - Blood lactate responses to submaximal field exercise tests in thoroughbred horses. 22654999 - The effect of exercise on pulpal and gingival blood flow in physically active and inact... 3322539 - Effect of exercise on net hepatic uptake of lactate, pyruvate, alanine, and glycerol in... 8039519 - Plasma lactate concentration increases as a parabola with delay during ramp exercise. 6656309 - The effect of short- and long-term exercise on aldolase activity in muscles of cw-1 and... 10400849 - The natural history of exercise-induced anaphylaxis: survey results from a 10-year foll... 18491999 - Home-based exercise increases exercise capacity but not quality of life in people with ... |
Publication Detail:
|
Type: Clinical Trial; Comparative Study; Journal Article |
Journal Detail:
|
Title: Journal of sports sciences Volume: 22 ISSN: 0264-0414 ISO Abbreviation: J Sports Sci Publication Date: 2004 Feb |
Date Detail:
|
Created Date: 2004-03-04 Completed Date: 2004-06-22 Revised Date: 2006-11-15 |
Medline Journal Info:
|
Nlm Unique ID: 8405364 Medline TA: J Sports Sci Country: England |
Other Details:
|
Languages: eng Pagination: 215-25 Citation Subset: IM |
Affiliation:
|
Department of Exercise and Sport Science, The Manchester Metropolitan University, Crewe +Alsager Faculty, Alsager ST7 2HL, UK. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Adolescent Anthropometry Exercise / physiology* Female Heart Rate / physiology Humans Lactic Acid / blood* Male Oxygen Consumption / physiology Physical Endurance / physiology* Reference Values Running / physiology* Sex Factors |
| Chemical | |
Reg. No./Substance:
|
50-21-5/Lactic Acid |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Do pattern recognition skills transfer across sports? A preliminary analysis.
Next Document: Riding out the storm: sympathetic storming after traumatic brain injury.