The relationship between power and time to fatigue in cycle ergometer exercise

International Journal of Sports Medicine
D W Hill

Abstract

The purpose of this study was to evaluate three critical power (P (critical)) models. Ten university students performed tests that elicited fatigue in > 2 min to approximately 10 min. Power and time data were fit to a 2-parameter hyperbolic model, a 3-parameter hyperbolic model, and a 3-parameter exponential model. Models described the power-time relationship well (R (2) > or = 0.995). However, P (critical) (209 +/- 51 W; SEE: 20 +/- 47 W) and the time constant (198 +/- 87 s; SEE: 103 +/- 246 W) from the exponential model have no obvious meaning. The 2-parameter model produced P (critical) (187 +/- 38 W) and anaerobic work capacity (20.4 +/- 9.0 kJ) that have known physiological meaning, with excellent confidence (SEE: 2 +/- 2 W and 1.0 +/- 1.0 kJ, respectively). Addition of a maximal power parameter to the 2-parameter model did not improve description of the relationship, and the third parameter was superfluous. The 2-parameter model was preferred because, for the range of exercise durations used in this study, it describes the power-relationship adequately and in a most parsimonious fashion.

Citations

Nov 2, 2005·European Journal of Applied Physiology·J DekerleH Carter
Nov 15, 2005·European Journal of Applied Physiology·R Hugh Morton
Jun 21, 2006·European Journal of Applied Physiology·Michel Chatagnon, Thierry Busso
Feb 24, 2009·Journal of Sports Sciences·Jeanne DekerleHelen Carter
Mar 3, 2010·Medicine and Science in Sports and Exercise·Andrew M JonesDavid C Poole
Feb 5, 2011·Journal of Strength and Conditioning Research·Erwan LeclairSerge Berthoin
Dec 18, 2008·Applied Physiology, Nutrition, and Metabolism = Physiologie Appliquée, Nutrition Et Métabolisme·Craig A WilliamsHelen Carter
Dec 12, 2018·Journal of Strength and Conditioning Research·Daniel Muniz-PumaresMark Glaister
Jan 30, 2019·European Journal of Applied Physiology·Giovanni VinettiGuido Ferretti
Dec 7, 2007·American Journal of Physiology. Regulatory, Integrative and Comparative Physiology·Andrew M JonesDavid C Poole
Oct 29, 2020·The Journal of Physiology·David C PooleL Bruce Gladden

❮ 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.