Aerobic fitness, muscle efficiency, and motor unit recruitment during ramp exercise

Medicine and Science in Sports and Exercise
Jan BooneJacques Bouckaert

Abstract

The purpose of this study was to test whether the higher slope of the oxygen uptake/work rate relationship (DeltaVO2/DeltaW) in aerobically trained subjects compared with less trained counterparts during a ramp protocol is related to changes in muscle fiber activation. Ten cyclists and 10 physically active (PA) students performed two ramp exercises (ramp 25 protocol and relative ramp protocol, leading to exhaustion in 12 min) and a step protocol (20-60-100-140-180-220 W). Pulmonary gas exchange was measured, and muscle fiber activity was recorded with surface EMG of the musculus vastus lateralis. V O2 and integrated EMG (iEMG) were described as functions of work rate up to the gas exchange threshold, and linear regression analysis was used to determine the DeltaVO2/DeltaW and the slope of the iEMG/W relationship (DeltaiEMG/DeltaW). The statistical analysis revealed a higher DeltaVO2/DeltaW in cyclists compared with PA students in ramp exercises (ramp 25 = 9.98 +/- 0.51 vs 9.18 +/- 0.59 mL x min(-1) x W(-1); relative ramp = 9.87 +/- 0.30 vs 9.16 +/- 0.33 mL x min(-1) x W(-1) in the cyclists and PA students, respectively; P < 0.05) but not in step exercise (9.97 +/- 0.32 and 9.83 +/- 0.37 mL x min(-1) x W(-1) in cyclists and PA s...Continue Reading

References

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
Dec 1, 1991·Journal of Applied Physiology·T J Barstow, P A Molé
Mar 1, 1991·Ergonomics·G A Mirka
Jun 1, 1986·Journal of Applied Physiology·W L BeaverB J Whipp
Dec 1, 1988·Journal of Applied Physiology·G D Swanson, R L Hughson
Jan 1, 1988·European Journal of Applied Physiology and Occupational Physiology·J E HansenK Wasserman
Feb 1, 1971·Journal of Applied Physiology·B J Whipp
Jan 1, 1981·Journal of Applied Physiology: Respiratory, Environmental and Exercise Physiology·B J WhippK Wasserman
Aug 1, 1982·The Journal of Physiology·C J De LucaA P Xenakis
Jan 1, 1996·Basic Research in Cardiology·L Hove-MadsenR Fischmeister
Dec 15, 1996·The Journal of Physiology·C J Barclay
Jan 7, 1998·Canadian Journal of Applied Physiology = Revue Canadienne De Physiologie Appliquée·M Van CutsemK Hainaut
Apr 30, 1998·European Journal of Applied Physiology and Occupational Physiology·J A ZoladzJ Majerczak
Jan 24, 2002·Experimental Physiology·Barry W ScheuermannThomas J Barstow
Feb 2, 2002·European Journal of Applied Physiology·C J BrittainB J Whipp
Feb 6, 2002·Medicine and Science in Sports and Exercise·Alejandro LucíaJosé L Chicharro
Aug 8, 2002·Medicine and Science in Sports and Exercise·Lindsay A MalloryThomas J Barstow
Aug 10, 2002·Medicine·Anneke Maat-KievitRaymund Roos
Oct 26, 2002·Exercise and Sport Sciences Reviews·Steven A Kautz, Richard R Neptune
Jul 15, 2003·Journal of Applied Physiology·J R DayB J Whipp
Oct 21, 2003·European Journal of Applied Physiology·Andrew M JonesJamie S M Pringle
Feb 10, 2004·Medicine and Science in Sports and Exercise·Dale C BickhamPeter F Le Rossignol
Feb 14, 2004·Journal of Electromyography and Kinesiology : Official Journal of the International Society of Electrophysiological Kinesiology·François HugYves Jammes
Oct 27, 2004·European Journal of Applied Physiology·K KoppoJ Bouckaert
Jun 24, 2006·Journal of Applied Physiology·Jacques DuchateauRoger M Enoka
Sep 9, 2006·Journal of Applied Physiology·DeAnna L AdkinsJeffrey A Kleim
Nov 6, 2007·Respiratory Physiology & Neurobiology·Andrew E Kilding, Andrew M Jones
May 2, 2008·Respiratory Physiology & Neurobiology·Jan BooneJacques Bouckaert

❮ Previous
Next ❯

Citations

Jun 15, 2013·Pulmonary Medicine·Roberta P RamosJ Alberto Neder
Sep 3, 2013·Journal of Science and Medicine in Sport·Fernando G BeltramiTimothy D Noakes
Apr 8, 2015·Pediatric Pulmonology·Jeremy FieldingRyan A Harris
Oct 5, 2017·Brazilian Journal of Medical and Biological Research = Revista Brasileira De Pesquisas Médicas E Biológicas·A C BarrocoJ A Neder
Jun 19, 2010·Medicine and Science in Sports and Exercise·Raffy Dotan

❮ 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.