Document Detail

Prior heavy exercise enhances performance during subsequent perimaximal exercise.
MedLine Citation:
PMID:  14652506     Owner:  NLM     Status:  MEDLINE    
PURPOSE: To test the hypothesis that prior heavy exercise increases the time to exhaustion during subsequent perimaximal exercise. METHODS: Seven healthy males (mean +/- SD 27 +/- 3 yr; 78.4 +/- 0.7 kg) completed square-wave transitions from unloaded cycling to work rates equivalent to 100, 110, and 120% of the work rate at VO2peak (W-[VO2peak) after no prior exercise (control, C) and 10 min after a 6-min bout of heavy exercise at 50% Delta (HE; half-way between the gas exchange threshold (GET) and VO2peak), in a counterbalanced design. RESULTS: Blood [lactate] was significantly elevated before the onset of the perimaximal exercise bouts after prior HE (approximately 2.5 vs approximately 1.1 mM; P < 0.05). Prior HE increased time to exhaustion at 100% (mean +/- SEM. C: 386 +/- 92 vs HE: 613 +/- 161 s), 110% (C: 218 +/- 26 vs HE: 284 +/- 47 s), and 120% (C: 139 +/- 18 vs HE: 180 +/- 29 s) of W-VO2peak, (all P < 0.01). VO2 was significantly higher at 1 min into exercise after prior HE at 110% W-VO2peak (C: 3.11 +/- 0.14 vs HE: 3.42 +/- 0.16 L x min(-1); P < 0.05), and at 1 min into exercise (C: 3.25 +/- 0.12 vs HE: 3.67 +/- 0.15; P < 0.01) and at exhaustion (C: 3.60 +/- 0.08 vs HE: 3.95 +/- 0.12 L x min(-1); P < 0.01) at 120% of W-VO2peak. CONCLUSIONS: This study demonstrate that prior HE, which caused a significant elevation of blood [lactate], resulted in an increased time to exhaustion during subsequent perimaximal exercise presumably by enabling a greater aerobic contribution to the energy requirement of exercise.
Andrew M Jones; Daryl P Wilkerson; Mark Burnley; Katrien Koppo
Related Documents :
22981226 - Subaortic right ventricular characteristics and relationship to exercise capacity in co...
8460066 - E1 pyruvate dehydrogenase deficiency in a child with motor neuropathy.
1011956 - Physiological investigations of swedish elite canoe competitors.
7806416 - Mechanisms of acid-base homeostasis in acetate and bicarbonate dialysis, lactate hemofi...
12433856 - Metabolic, thermoregulatory, and perceptual responses during exercise after lower vs. w...
10205696 - Effect on nasal resistance of an external nasal splint and isotonic exercise.
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Medicine and science in sports and exercise     Volume:  35     ISSN:  0195-9131     ISO Abbreviation:  Med Sci Sports Exerc     Publication Date:  2003 Dec 
Date Detail:
Created Date:  2003-12-03     Completed Date:  2004-04-30     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  8005433     Medline TA:  Med Sci Sports Exerc     Country:  United States    
Other Details:
Languages:  eng     Pagination:  2085-92     Citation Subset:  IM; S    
Department of Exercise and Sport Science, Manchester Metropolitan University, Alsager, United Kingdom.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Exercise / physiology*
Heart Rate
Lactic Acid / blood
Muscle, Skeletal / metabolism*
Oxygen Consumption / physiology*
Physical Exertion / physiology*
Pulmonary Gas Exchange / physiology*
Reg. No./Substance:
50-21-5/Lactic Acid

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Previous Document:  The effects of klapskate hinge position on push-off performance: a simulation study.
Next Document:  Heart rate recovery from submaximal exercise in boys and girls.