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Titolo:
Do knee injuries have long-term consequences for isometric and dynamic muscle strength?
Autore:
Holder-Powell, HM; Di Matteo, G; Rutherford, OM;
Indirizzi:
Univ London Kings Coll, Appl Biomed Res Grp, GKT Sch Biomed Sci, London SE1 1UL, England Univ London Kings Coll London England SE1 1UL i, London SE1 1UL, England Brunel Univ, Dept Hlth Sci, Middlesex, England Brunel Univ Middlesex England l Univ, Dept Hlth Sci, Middlesex, England
Titolo Testata:
EUROPEAN JOURNAL OF APPLIED PHYSIOLOGY
fascicolo: 3-4, volume: 85, anno: 2001,
pagine: 310 - 316
SICI:
1439-6319(200108)85:3-4<310:DKIHLC>2.0.ZU;2-I
Fonte:
ISI
Lingua:
ENG
Soggetto:
ANTERIOR CRUCIATE LIGAMENT; QUADRICEPS INHIBITION; REFLEX INHIBITION; REHABILITATION; IMMOBILIZATION; RECONSTRUCTION; EXTENSION; EFFUSION; FEMORIS; TORQUE;
Keywords:
knee injury; rehabilitation; eccentric activity; muscle strength;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
32
Recensione:
Indirizzi per estratti:
Indirizzo: Holder-Powell, HM Univ London Kings Coll, Appl Biomed Res Grp, GKT Sch Biomed Sci, Guys Campus, London SE1 1UL, England Univ London Kings Coll Guys Campus London England SE1 1UL
Citazione:
H.M. Holder-Powell et al., "Do knee injuries have long-term consequences for isometric and dynamic muscle strength?", EUR J A PHY, 85(3-4), 2001, pp. 310-316

Abstract

To ascertain whether decrements in knee extensor muscle strength persist years after a traumatic ligamentous or meniscal knee injury, with reference to (1) the type of muscle activity, (2) the dominance of injury, and (3) the time since injury, 36 subjects with previous unilateral knee injuries were assessed. Peak voluntary quadriceps muscle strength was measured using the KinCom 500H dynamometer during isometric, concentric (30 degrees .s(-1) and 120 degrees .s(-1)) and eccentric contractions (30.s(-1)), and the findings for each type of contraction were compared. Significant differences in quadriceps muscle strength were seen between (1) the injured and uninjured limbs during maximal voluntary isometric (P=0.0003), concentric (P<0.0001) and eccentric (P<0.0001) contractions, and (2) the isometric and concentricdecrements (P = 0.004), and the isometric and eccentric decrements (P=0.012) within the same injured limb. The decrements in eccentric strength were significantly greater if they affected the dominant rather than the non-dominant limb (P=0.0186). No relationship was seen between the time since injury and the degree of isometric or dynamic decrement. Deficits in quadricepsmuscle strength remained for a long time after traumatic knee injury, withexercise levels rarely returning to the previously uninjured state. The degree of decrement in muscle strength was dependent upon the type of muscle activity, with concentric and eccentric activity showing greater decrementsthan those seen with isometric activity. Deficits in the type of activity varied widely in the same individual, and eccentric decrements were significantly worse following dominant knee injuries. Possible explanations for these findings and the implications for rehabilitation following knee injury are discussed.

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Documento generato il 02/04/20 alle ore 21:45:16