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 Outcome Measures: 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.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 259-269 |
| Number of pages | 11 |
| Journal | Journal of Sport Rehabilitation |
| Volume | 23 |
| Issue number | 3 |
| DOIs | |
| State | Published - Jan 1 2014 |
| Externally published | Yes |
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Keywords
- Focal chondral defects
- Muscle strength
- Stair climbing
ASJC Scopus subject areas
- Biophysics
- Orthopedics and Sports Medicine
- Physical Therapy, Sports Therapy and Rehabilitation
- Rehabilitation
Cite this
Quadriceps femoris strength and sagittal-plane knee biomechanics during stair ascent in individuals with articular cartilage defects in the knee. / Thoma, Louise M.; Flanigan, David C.; Chaudhari, Ajit M.; Siston, Robert A.; Best, Thomas; Schmitt, Laura C.
In: Journal of Sport Rehabilitation, Vol. 23, No. 3, 01.01.2014, p. 259-269.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Quadriceps femoris strength and sagittal-plane knee biomechanics during stair ascent in individuals with articular cartilage defects in the knee
AU - Thoma, Louise M.
AU - Flanigan, David C.
AU - Chaudhari, Ajit M.
AU - Siston, Robert A.
AU - Best, Thomas
AU - Schmitt, Laura C.
PY - 2014/1/1
Y1 - 2014/1/1
N2 - 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 Outcome Measures: 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.
AB - 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 Outcome Measures: 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.
KW - Focal chondral defects
KW - Muscle strength
KW - Stair climbing
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U2 - 10.1123/JSR.2013-0088
DO - 10.1123/JSR.2013-0088
M3 - Article
VL - 23
SP - 259
EP - 269
JO - Journal of Sport Rehabilitation
JF - Journal of Sport Rehabilitation
SN - 1056-6716
IS - 3
ER -