PMID: 11932577Apr 5, 2002Paper

Force deficits by stretches of activated muscles with constant or increasing velocity

Medicine and Science in Sports and Exercise
Mark E T Willems, William T Stauber

Abstract

Force deficits produced by constant (CV) versus increasing velocity (IV) stretches of rat plantar flexor muscles at low and high levels of nerve activation were studied. Twenty repeated stretches were imposed on isometric contractions by ankle rotation from 90 degrees to 40 degrees at 300 degrees.s(-1) and at 3000 degrees.s(-2) during 80-Hz (CV80 and IV80) and 20-Hz stimulation (CV20 and IV20). Rest periods between contractions were 3 min. Isometric and peak stretch forces during the stretch protocols and force-frequency relationships before and 1 h after the stretch protocols were measured. Peak stretch forces were similar for IV80-CV80 and for IV20-CV20 rats but were lower for IV20-CV20 than for IV80-CV80 rats throughout the stretch protocol. At the end of the stretch protocol, isometric force deficits were similar for IV80 (49.9 +/- 2.1%) and CV80 (54.5 +/- 2.5%) and for IV20 (16.4 +/- 2.8%) and CV20 (15.8 +/- 1.9%) but lower for IV20-CV20 rats. In contrast, for all groups, deficits in peak stretch force were similar at the end of the stretch protocol (IV80: 35.0 +/- 1.8%, CV80: 32.3 +/- 2.2%, IV20: 26.8 +/- 3.6%, CV20: 28.0 +/- 2.0%). After 1 h, isometric force deficits were similar for either IV80-CV80 or IV20-CV20 at 5, 1...Continue Reading

References

Jul 1, 1986·Journal of Applied Physiology·K K McCully, J A Faulkner
Jan 1, 1983·Journal of Applied Physiology: Respiratory, Environmental and Exercise Physiology·R B ArmstrongJ A Schwane
Dec 1, 1981·Pflügers Archiv : European journal of physiology·C T Davies, M J White
Nov 1, 1994·Journal of Applied Physiology·B RoszekP A Huijing
Sep 1, 1994·Ergonomics·R W SchoenmarklinS E Leurgans
Jan 1, 1996·Journal of Applied Physiology·R L LieberJ Fridén
Jan 1, 1997·Journal of Applied Physiology·K D Hunter, J A Faulkner
Nov 28, 1997·Medical & Biological Engineering & Computing·R G CutlipK H Means
Jun 6, 1998·Molecular and Cellular Biochemistry·R J BenzR L Lieber
Jul 9, 1998·Journal of Applied Physiology·C P IngallsR B Armstrong
Dec 9, 1998·The American Journal of Physiology·G S Lynch, J A Faulkner
Dec 22, 1999·Journal of Applied Physiology·D L Morgan, D G Allen
Jul 27, 2000·Medicine and Science in Sports and Exercise·M E Willems, W T Stauber
Nov 18, 2000·Medicine and Science in Sports and Exercise·M E Willems, W T Stauber
May 8, 2001·Exercise and Sport Sciences Reviews·G L WarrenR B Armstrong

❮ Previous
Next ❯

Citations

Mar 26, 2005·Journal of Applied Physiology·Timothy A Butterfield, Walter Herzog
Feb 5, 2004·Journal of Electromyography and Kinesiology : Official Journal of the International Society of Electrophysiological Kinesiology·William T Stauber
Jun 1, 2005·Journal of Biomechanics·Richard M LoveringPatrick G De Deyne

❮ 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

Medicine and Science in Sports and Exercise
Gabriel S TrajanoA J Blazevich
Archives of Physiology and Biochemistry
Mark E T Willems, William T Stauber
Canadian Journal of Applied Physiology = Revue Canadienne De Physiologie Appliquée
Mark E T Willems, William T Stauber
© 2022 Meta ULC. All rights reserved