Supra-maximal cycling efficiency assessed in humans by using a new protocol

European Journal of Applied Physiology
Laurent MourotA Belli

Abstract

This study proposed a non-invasive method to determine the gross (GE, no baseline correction), net (NE, resting metabolism as the baseline correction) and work (WE, unloaded cycling as the baseline correction) efficiencies during cycling at an intensity higher than the maximal aerobic power (MAP). Twelve male subjects performed two exercises consisting of 4 min at 50% MAP followed either by 8 min at 63% MAP or by 8 sequences of 60 s divided into 10 s at 130% MAP and 50 s at 50% MAP (i.e., 63% MAP on average). Oxygen uptake was continuously measured to calculate GE, NE and WE at 50%, 63% and 130% MAP, and the data presented as the means and standard deviations. The GE values were 18.2%, 19.1%, 22.7%, the NE values were 22.4%, 22.8%, 24.3% and the WE values were 34.2%, 31.4% and 27.2% at 50%, 63% and 130% MAP, respectively. The GE and NE increased (P < 0.001) whereas the WE decreased (P < 0.001) with each increment in power output. The GE was lower than the NE (P < 0.001) at 50% and 63% MAP and than the WE (P < 0.001) at all intensities. The NE was lower (P < 0.001) than the WE at 50% and 63% MAP. These results showed that (1) efficiency index values obtained during supra-maximal exercise were consistent with previous proposals a...Continue Reading

References

Jan 1, 1977·Medicine and Science in Sports·K S Nordeen-Snyder
Jun 1, 1975·Journal of Applied Physiology·G A Gaesser, G A Brooks
Jul 1, 1992·Medicine and Science in Sports and Exercise·E F CoyleJ D Beltz
Mar 1, 1992·Medicine and Science in Sports and Exercise·J J WidrickJ Hamill
Aug 1, 1991·Medicine and Science in Sports and Exercise·G A Brooks
Aug 1, 1989·Journal of Applied Physiology·H C Hitchcock
Jan 1, 1988·Journal of Applied Physiology·J I MedbøO M Sejersted
Apr 1, 1988·International Journal of Sports Medicine·M O Ericson, R Nisell
Jan 1, 1987·European Journal of Applied Physiology and Occupational Physiology·J HirvonenM Härkönen
Oct 1, 1987·Journal of Applied Physiology·A J Sargeant, P Dolan
Jan 1, 1986·European Journal of Applied Physiology and Occupational Physiology·R WellsR Hughson
Jan 1, 1985·European Journal of Applied Physiology and Occupational Physiology·J R Coast, H G Welch
May 1, 1969·Journal of Applied Physiology·B J Whipp, K Wasserman
Feb 1, 1984·Journal of Applied Physiology: Respiratory, Environmental and Exercise Physiology·S K PowersM Mangum
Apr 1, 1984·International Journal of Sports Medicine·D BöningN Maassen
Feb 1, 1981·Journal of Applied Physiology: Respiratory, Environmental and Exercise Physiology·M K StuartR H Cox
Mar 1, 1980·Journal of Applied Physiology: Respiratory, Environmental and Exercise Physiology·W N StainbsyB A Wilson
Sep 1, 1993·Medicine and Science in Sports and Exercise·M J BerryC M Woodard
Jan 1, 1993·European Journal of Applied Physiology and Occupational Physiology·C CapelliP E di Prampero
Sep 1, 1995·Medicine and Science in Sports and Exercise·E T HowleyH G Welch
Jan 1, 1995·European Journal of Applied Physiology and Occupational Physiology·M P FrancescatoP E di Prampero
Jan 1, 1996·European Journal of Applied Physiology and Occupational Physiology·L M ArsacJ R Lacour
Oct 1, 1996·Canadian Journal of Applied Physiology = Revue Canadienne De Physiologie Appliquée·J Bangsbo
Nov 1, 1996·Medicine and Science in Sports and Exercise·B L Nickleberry, G A Brooks
Mar 1, 1997·Medicine and Science in Sports and Exercise·J KangK F Metz
Feb 25, 1998·Medicine and Science in Sports and Exercise·J Bangsbo
Apr 30, 1998·European Journal of Applied Physiology and Occupational Physiology·J A ZoladzJ Majerczak
Sep 29, 1999·European Journal of Applied Physiology and Occupational Physiology·M A ChristmassP G Arthur
Oct 29, 1999·European Journal of Applied Physiology and Occupational Physiology·J Chavarren, J A Calbet
Oct 24, 2002·Acta Physiologica Scandinavica·E A HansenG Sjøgaard

❮ Previous
Next ❯

Citations

Nov 12, 2005·European Journal of Applied Physiology·Karim ZameziatiAlain Belli
Feb 21, 2009·European Journal of Applied Physiology·Gertjan Ettema, Håvard Wuttudal Lorås
Jan 30, 2019·European Journal of Applied Physiology·Giovanni VinettiGuido Ferretti

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.

Related Papers

Canadian Journal of Applied Physiology = Revue Canadienne De Physiologie Appliquée
Frédérique HintzyNicolas Tordi
European Journal of Applied Physiology and Occupational Physiology
T FukunagaT Asami
© 2021 Meta ULC. All rights reserved