Document Detail


VO2max May Not Be Reached During Exercise to Exhaustion above Critical Power.
MedLine Citation:
PMID:  22330019     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
PURPOSE: This study was designed to determine whether VO2 reaches a maximum, equivalent to that attained in an incremental exercise test to exhaustion, during "submaximal" fatigue-inducing constant-power exercise bouts above Critical Power (CP). METHODS: Nine males (age: 24.6 ± 3.6 yr.; ht: 182.8 ± 6.9 cm; wt: 77.8 ± 12.1 kg) and 4 females (age: 29.0 ± 7.3 yr.; ht: 170.8 ± 3.2 cm; wt: 61.8 ± 8.2 kg) underwent an incremental VO2max test (IET) on a cycle ergometer, followed by 4 or 5 randomly assigned, constant-power exercise bouts to exhaustion, on separate days. Critical power for each subject was estimated using linear and nonlinear regression. RESULTS: IET VO2max averaged 3.55 ± 0.92 l/min (Respiratory exchange ratio = 1.21 ± 0.05; heart rate = 186 ± 10 bpm; 96.1 ± 6.3% age-predicted max). Mean peak VO2 (range 3.32 ± 0.88 to 3.54 ± 0.91 l/min) during the 3 highest constant-power bouts (two of which were 53 to 82 W less than peak power output attained during IET) was not significantly different than IET VO2max. Eleven of 13 subjects exceeded their IET VO2max during at least one of the constant-power exercise bouts. However, peak VO2 (3.11 ± 0.79 l/min) during the lowest constant-power exercise bout, which ranged from 10 W to 36 W above CP estimated with a 2-parameter nonlinear model, was significantly lower than IET VO2max (88.2 ± 9.4% of IET VO2max). CONCLUSIONS: At power outputs above CP, VO2 does not necessarily increase to maximum during constant-power exercise to exhaustion. Additionally, the highest VO2 values measured during a traditional VO2 "max" test (i.e., IET) may not reflect the highest attainable VO2 despite VO2max criteria being met.
Authors:
Brandon J Sawyer; R Hugh Morton; Christopher J Womack; Glenn A Gaesser
Related Documents :
17038489 - The effect of running, strength, and vibration strength training on the mechanical, mor...
19041639 - Permeation of several cryoprotectant agents into porcine articular cartilage.
22490509 - Improved cycling performance with ingestion of hydrolyzed marine protein depends on per...
12566629 - Collagenase-induced changes in articular cartilage as detected by electron-microscopic ...
22858629 - Decreased dna fragmentation and apoptotic signaling in soleus muscle of hypertensive ra...
7976169 - Cartilage canals in the fetal elbow joint in man.
9723879 - New insights into adipokinetic hormone signaling.
21333809 - Chapter 11--novel mechanism for hyperreflexia and spasticity.
19301219 - Fitness in contemporary dance: a systematic review.
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-2-9
Journal Detail:
Title:  Medicine and science in sports and exercise     Volume:  -     ISSN:  1530-0315     ISO Abbreviation:  -     Publication Date:  2012 Feb 
Date Detail:
Created Date:  2012-2-14     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8005433     Medline TA:  Med Sci Sports Exerc     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
1Arizona State University, School of Nutrition and Health Promotion, Phoenix, AZ 2Massey University, School of Sport and Exercise, Palmerston North, New Zealand 3James Madison University, Department of Kinesiology, Harrisonburg, VA.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:

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


Previous Document:  Recent Insights into the Molecular Basis of Muscular Fatigue.
Next Document:  Perceptually regulated training at RPE13 is pleasant and improves physical health.