Quadriceps femoris strength and sagittal-plane knee biomechanics during stair ascent in individuals with articular cartilage defects in the knee.
J Sport Rehabil
; 23(3): 259-69, 2014 Aug.
Article
en En
| MEDLINE
| ID: mdl-25115158
ABSTRACT
CONTEXT Few objective data are available regarding strength and movement patterns in individuals with articular cartilage defects (ACDs) of the knee. OBJECTIVES:
To test the following hypotheses (1) The involved limb of individuals with ACDs would demonstrate lower peak knee-flexion angle, peak internal knee-extension moment, and peak vertical ground-reaction force (vGRF) than the contralateral limb and healthy controls. (2) On the involved limb of individuals with ACDs, quadriceps femoris strength would positively correlate with peak knee-flexion angle, peak internal knee-extension moment, and peak vGRF.DESIGN:
Cross-sectional.SETTING:
Biomechanics research laboratory.PARTICIPANTS:
11 individuals with ACDs in the knee who were eligible for surgical cartilage restoration and 10 healthy controls.METHODS:
Quadriceps femoris strength was quantified as peak isometric knee-extension torque via an isokinetic dynamometer. Sagittal-plane knee kinematics and kinetics were measured during the stance phase of stair ascent with 3-dimensional motion analysis. MAIN OUTCOMEMEASURES:
Quadriceps strength and knee biomechanics during stair ascent were compared between the involved and contralateral limbs of participants with ACD (paired t tests) and with a control group (independent-samples t tests). Pearson correlations evaluated relationships between strength and stair-ascent biomechanics.RESULTS:
Lower quadriceps strength and peak internal knee-extension moments were observed in the involved limb than in the contralateral limb (P < .01) and the control group (P < .01). For the involved limb of the ACD group, quadriceps femoris strength was strongly correlated (r = .847) with involved-limb peak internal knee-extension moment and inversely correlated (r = -.635) with contralateral peak vGRF.CONCLUSIONS:
Individuals with ACDs demonstrated deficits in quadriceps femoris strength with associated alterations in movement patterns during stair ascent. The results of this study are not comprehensive; further research is needed to understand the physiological characteristics, activity performance, and movement quality in this population.
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Cartílago Articular
/
Músculo Cuádriceps
/
Fuerza Muscular
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Traumatismos de la Rodilla
Tipo de estudio:
Observational_studies
/
Prevalence_studies
/
Prognostic_studies
/
Risk_factors_studies
Límite:
Adult
/
Female
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Humans
/
Male
Idioma:
En
Revista:
J Sport Rehabil
Asunto de la revista:
MEDICINA ESPORTIVA
/
REABILITACAO
Año:
2014
Tipo del documento:
Article