PMID: 11909879Mar 23, 2002Paper

Functionally relevant thresholds of quadriceps femoris strength

The Journals of Gerontology. Series A, Biological Sciences and Medical Sciences
Lori L Ploutz-SnyderDouglas A Wolf

Abstract

The purpose of this study was to identify quadriceps femoris strength thresholds below which performance on ambulatory tasks is compromised. A second purpose was to evaluate whether self-reported functioning matches evaluated performance of the activities. Subjects (N = 100; age 73 +/- 0.9 years) participated in isometric knee extension strength tests, performed three functional ambulatory tasks (chair rise, gait speed, and stair ascent and descent), and answered standard survey questions assessing physical function. Significant relationships were observed between functional performance and the ratio of isometric leg extension peak torque to body weight (STR/WT) for each activity (p <.0001). For each activity, thresholds of STR/WT between 3.0 and 3.5 N m/kg were observed, below which the likelihood for success was reduced. Thresholds were determined by calculating the value of STR/WT that minimized the classification error. Individuals with a STR/WT < 3.0 N m/kg are at a substantial risk for impaired function in chair rise, gait speed, and stair ascent and descent. Sensitivity and specificity of STR/WT as a predictor of functional success ranged from 76% to 81% and from 78% to 94%, respectively, depending on activity. This is o...Continue Reading

References

Jan 1, 1991·Journal of Biomechanics·P O RileyW A Hodge
Sep 1, 1990·Age and Ageing·R H HyattJ D Maxwell
Apr 1, 1988·Medicine and Science in Sports and Exercise·J E HimannD H Paterson
Jun 1, 1995·Journal of the American Geriatrics Society·T M GillM E Tinetti
Mar 1, 1994·Age and Ageing·T RantanenE Heikkinen
Nov 1, 1996·The Journals of Gerontology. Series A, Biological Sciences and Medical Sciences·D M BuchnerE H Wagner
Sep 1, 1996·Age and Ageing·D M BuchnerB J de Lateur
Dec 1, 1996·Journal of Biomechanics·M A HughesM L Schenkman
Mar 1, 1997·American Journal of Public Health·J A LangloisR B Wallace
Mar 18, 1997·Proceedings of the National Academy of Sciences of the United States of America·K G MantonE Stallard
Oct 6, 1997·The Journals of Gerontology. Series A, Biological Sciences and Medical Sciences·L FerrucciL P Fried
Aug 26, 1998·American Journal of Physical Medicine & Rehabilitation·K KerschanE Preisinger
Dec 23, 1998·Proceedings of the National Academy of Sciences of the United States of America·B H Singer, K G Manton
May 14, 1999·The Journal of Orthopaedic and Sports Physical Therapy·R L GajdosikA K Williams
Sep 14, 2000·The Journals of Gerontology. Series B, Psychological Sciences and Social Sciences·T A Waidmann, K Liu
May 10, 2001·Proceedings of the National Academy of Sciences of the United States of America·K G Manton, X Gu
Jul 11, 2001·The Journals of Gerontology. Series B, Psychological Sciences and Social Sciences·R F SchoeniR B Wallace

❮ Previous
Next ❯

Citations

Oct 14, 2005·European Journal of Applied Physiology·P-Y BoussugeE Van Praagh
Sep 30, 2005·European Journal of Applied Physiology·Todd M ManiniLori Ploutz-Snyder
Sep 27, 2012·European Journal of Applied Physiology·Jeffrey W RyderLori L Ploutz-Snyder
Apr 16, 2013·Research in Developmental Disabilities·Adriana Neves dos SantosNelci Adriana Cicuto Ferreira Rocha
Mar 2, 2010·Journal of Motor Behavior·Carolina Souza Neves da CostaNelci Adriana Cicuto Ferreira Rocha
May 5, 2004·The Journals of Gerontology. Series A, Biological Sciences and Medical Sciences·Olivier SeynnesPierre L Bernard
Aug 12, 2004·The Journals of Gerontology. Series A, Biological Sciences and Medical Sciences·Benjamin K Barry, Richard G Carson
Jun 4, 2005·The Journals of Gerontology. Series A, Biological Sciences and Medical Sciences·MaryFran R SowersMelissa Gross
Dec 15, 2006·The Journals of Gerontology. Series A, Biological Sciences and Medical Sciences·Anthony P MarshLuigi Ferrucci
Nov 15, 2007·The Journals of Gerontology. Series A, Biological Sciences and Medical Sciences·Anne C TiedemannStephen R Lord
Jun 28, 2007·The Journals of Gerontology. Series A, Biological Sciences and Medical Sciences·Todd ManiniLori Ploutz-Snyder
Mar 30, 2011·The Journals of Gerontology. Series A, Biological Sciences and Medical Sciences·Todd M Manini, Brian C Clark
Nov 16, 2010·The Journal of Cardiovascular Nursing·Yaewon SeoJustin M Yurkovich
Jul 5, 2007·Biomedical Engineering Online·Shinsuke YoshiokaSenshi Fukashiro
Oct 24, 2009·Biomedical Engineering Online·Shinsuke YoshiokaSenshi Fukashiro
Jan 15, 2011·Medicine and Science in Sports and Exercise·Patrick A SavageMichael J Toth
May 24, 2012·Medicine and Science in Sports and Exercise·Dain P LarocheKrzysztof Mackala
Mar 15, 2011·Journal of Strength and Conditioning Research·Richard W BohannonRichard C Gershon
Nov 14, 2013·BioMed Research International·Antonio I Cuesta-Vargas, Manuel González-Sánchez
May 17, 2013·The Journals of Gerontology. Series A, Biological Sciences and Medical Sciences·David J ClarkRoger A Fielding
Dec 25, 2012·The Journals of Gerontology. Series A, Biological Sciences and Medical Sciences·Sébastien Barbat-ArtigasMylène Aubertin-Leheudre
Jan 13, 2012·Journal of Biomechanics·Shinsuke YoshiokaSenshi Fukashiro
Oct 29, 2011·Archives of Physical Medicine and Rehabilitation·Evelien Van RoieChristophe Delecluse
Aug 10, 2011·Journal of Electromyography and Kinesiology : Official Journal of the International Society of Electrophysiological Kinesiology·Dain P LaRocheErica D Millett
May 24, 2011·Medical Engineering & Physics·R GaneaK Aminian
Nov 17, 2009·Archives of Gerontology and Geriatrics·Maria Giné-GarrigaViswanath B Unnithan
Sep 27, 2015·The Journals of Gerontology. Series A, Biological Sciences and Medical Sciences·Renwei DongKaijun Niu
Apr 1, 2008·Archives of Physical Medicine and Rehabilitation·Skye Barbic, Brenda Brouwer
Jun 29, 2015·The Journal of Arthroplasty·Sumayeh B AbujaberJoseph A Zeni
Mar 8, 2007·Journal of the American Geriatrics Society·Todd M ManiniTamara B Harris
Jul 11, 2012·Journal of Intellectual Disability Research : JIDR·E Terblanche, P-H Boer
May 16, 2013·Muscle & Nerve·Jane A Kent-BraunJohn P Buonaccorsi
Jul 1, 2014·Scandinavian Journal of Medicine & Science in Sports·F MersmannA Arampatzis
May 14, 2008·Journal of Cardiac Failure·Yaewon SeoMary Dolansky
Feb 17, 2006·Gait & Posture·Omar S MianVasilios Baltzopoulos
May 17, 2005·Archives of Physical Medicine and Rehabilitation·Therese E JohnstonRandal R Betz

❮ 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.