Mechanical, biochemical, and electromyographic responses to short-term eccentric-concentric knee extensor training in humans

Journal of Strength and Conditioning Research
Márk VácziJ Pucsok

Abstract

This study examined the effects of short-term eccentric-concentric knee extensor training on mechanical and biochemical variables, myoelectric activity, and muscle soreness. Seventeen men were assigned to either experimental (E, n = 10) or control group (C, n = 7). Group E performed 90 maximal isokinetic eccentric-concentric knee extensor contractions on each of 3 consecutive days (Tr1-Tr3) followed by 1-day rest, and then on 4 more consecutive days (Tr4-Tr7). Peak eccentric torque of each contraction during the training was recorded and averaged for each session (MTr). Maximal isometric torque (M0), eccentric torque (M(ecc)), integrated electromyography (iEMG), plasma creatine kinase (CK), and lactate dehydrogenase (LDH) activities were measured before, immediately, 24, 48, and 72 hours after Tr1, at 1 and 3 days after Tr7. Group C did not train but performed all exercise tests; CK and LDH were measured at 3 time points only. Acutely, M0 and M(ecc) decreased and CK, LDH, and soreness increased more in E than in C 24 hours after Tr1. Chronically, MTr and M0 increased more in E than C by Tr7 and CK, LDH, and muscle soreness gradually decreased by Tr7 whereas iEMG increased more in E than in C after Tr3 through Tr7. High-intensit...Continue Reading

References

Apr 1, 1989·Sports Medicine·C B Ebbeling, P M Clarkson
Jun 1, 1986·International Journal of Sports Medicine·P M ClarksonJ S White
Apr 1, 1983·Physiological Reviews·H J Freund
Aug 1, 1983·International Journal of Sports Medicine·J FridénB Ekblom
Aug 1, 1995·International Journal of Sports Medicine·J MairB Puschendorf
Jan 1, 1997·European Journal of Applied Physiology and Occupational Physiology·S J BrownA E Donnelly
Jan 1, 1997·European Journal of Applied Physiology and Occupational Physiology·C JonesU Proske
Feb 26, 1998·Journal of Applied Physiology·T HortobágyiJ Tracy
Apr 22, 1999·Medicine and Science in Sports and Exercise·H AkimaS Katsuta
Aug 22, 2000·The Journals of Gerontology. Series A, Biological Sciences and Medical Sciences·T Hortobágyi, P DeVita
Sep 14, 2000·European Journal of Applied Physiology·M MurayamaK Minamitani
Aug 22, 2001·European Journal of Applied Physiology·K NosakaP Sacco
Aug 31, 2001·Medicine and Science in Sports and Exercise·K NosakaP Sacco
Oct 3, 2001·Medicine and Science in Sports and Exercise·T C Chen, S S Hsieh
Apr 13, 2002·The Journal of Orthopaedic and Sports Physical Therapy·Fuminari KanekoSerge H Roy
Jul 18, 2002·Histochemistry and Cell Biology·Ji-Guo YuLars-Eric Thornell
Aug 13, 2002·European Journal of Applied Physiology·Levente RáczJózsef Tihanyi
Jun 13, 2003·Journal of Sports Sciences·Larry W JudgeJeanmarie R Burke
Apr 6, 2004·Medicine and Science in Sports and Exercise·Darren J Dutto, William A Braun
Jul 12, 2005·European Journal of Applied Physiology·Athanasios Z JamurtasK Nosaka
May 21, 2008·Sports Medicine·Glyn Howatson, Ken A van Someren
Apr 10, 2009·European Journal of Applied Physiology·Olivier GirardGrégoire Millet

❮ Previous
Next ❯

Citations

Jan 10, 2012·Nitric Oxide : Biology and Chemistry·Zsolt RadakSataro Goto
Jul 14, 2017·Exercise and Sport Sciences Reviews·Erik P Rader, Brent A Baker
Feb 18, 2014·Journal of Strength and Conditioning Research·Dóra UreczkyJózsef Tihanyi
Oct 8, 2020·European Journal of Applied Physiology·János NégyesiRyoichi Nagatomi

❮ 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.