Isometric muscle force measurement for clinicians treating patients with osteoarthritis of the knee

Fransen, Marlene; Crosbie, Jack; Edmonds, John

doi:10.1002/art.10923

Cited by 52 publications

(43 citation statements)

References 35 publications

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“…3,28 This level may be an appropriate target for deciding whether or not intervention is warranted to slow or even avoid the development of medial compartment OA. Second, clinicians should consider conservative interventions such as strengthening of the quadriceps 29,30 and iliotibial band 31,32 or gait retraining 33,34 to lower the adduction torque to below the target level. For example, a medial thrust gait motion designed in a recent computational study has been shown to reduce the peak adduction torque by 35-50%, 35 an amount comparable to HTO surgery, in the one patient studied thus far.…”

Section: Discussionmentioning

confidence: 99%

Correlation between the knee adduction torque and medial contact force for a variety of gait patterns

Zhang

Banks

Mitchell³

et al. 2007

Journal Orthopaedic Research

440

298

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ABSTRACT:The external knee adduction torque has been proposed as a surrogate measure for medial compartment load during gait. However, a direct link between these two quantities has not been demonstrated using in vivo measurement of medial compartment load. This study uses in vivo data collected from a single subject with an instrumented knee implant to evaluate this link. The subject performed five different overground gait motions (normal, fast, slow, wide, and toe-out) with simultaneous collection of instrumented implant, video motion, and ground reaction data. For each trial, the knee adduction torque was measured externally while the total axial force applied to the tibial insert was measured internally. Based on data collected from the same subject performing treadmill gait under fluoroscopic motion analysis, a regression equation was developed to calculate medial contact force from the implant load cell measurements. Correlation analyses were performed for the stance phase and entire gait cycle to quantify the relationship between the knee adduction torque and both the medial contact force and the medial to total contact force ratio. When the entire gait cycle was analyzed, R 2 for medial contact force was 0.77 when all gait trials were analyzed together and between 0.69 and 0.93 when each gait trial was analyzed separately (p < 0.001 in all cases). For medial to total force ratio, R 2 was 0.69 for all trials together and between 0.54 and 0.90 for each trial separately (p < 0.001 in all cases). When only the stance phase was analyzed, R 2 values were slightly lower. These results support the hypothesis that the knee adduction torque is highly correlated with medial compartment contact force and medial to total force ratio during gait. ß

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Section: Discussionmentioning

confidence: 99%

Correlation between the knee adduction torque and medial contact force for a variety of gait patterns

Zhang

Banks

Mitchell³

et al. 2007

Journal Orthopaedic Research

440

298

View full text Add to dashboard Cite

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“…For each of the two muscle groups, the highest obtained value (in N) of three consecutive trials was defined as the maximal isometric force. A comparable isometric strength testing device has been shown to demonstrate discriminant validity and high test-retest reliability in knee OA patients [22].…”

Section: Potentially Modifiable Physical Factors Measurementsmentioning

confidence: 99%

Evaluation of potentially modifiable physical factors as predictors of health status in knee osteoarthritis patients referred for physical therapy

2012

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This file was dowloaded from the institutional repository Brage NIH -brage.bibsys.no/nih Goncalves, R. S., Pinheiro, J., Cabri, J. M. H. (2012) Results: Multiple stepwise regression analyses revealed that knee muscle strength, VAS of pain intensity, 6MWT, degree of knee flexion and BMI were significant predictors of at least two dimensions of knee-specific or generic physical health status. In the final models, the values of adjusted R 2 indicated that the selected combinations of these potentially modifiable physical factors explained 22.3% to 37.1% of the variance in KOOS subscales scores, 40.2% of the variance in KOS-ADLS scale score, and 20.8% to 34.0% of the variance in physical health SF-36 subscales scores. Conclusion:Physical therapists could take into consideration these moderate predictors of health status, albeit in an indirect way, to get a somewhat broader perspective on the impact of knee OA on their patients.

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“…Thigh muscle weakness has been commonly observed in patients with knee osteoarthritis (KOA) (1)(2)(3)(4)(5) or knee pain (6,7), and low muscle strength has been associated with incident symptomatic, but not with incident radiographic KOA (8). Muscle weakness is considered a potentially modifiable (9) risk factor of KOA and quadriceps muscle strengthening is recommended by the current Osteoarthritis Research Society International KOA treatment guidelines (10).…”

Section: Introductionmentioning

confidence: 99%

Association of Thigh Muscle Strength With Knee Symptoms and Radiographic Disease Stage of Osteoarthritis: Data From the Osteoarthritis Initiative

Ruhdorfer

Wirth

Hitzl

et al. 2014

Arthritis Care & Research

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Objective. To determine whether thigh muscle strength differs between symptomatic and asymptomatic knees, and/or different radiographic strata of knee osteoarthritis (KOA). Results. Isometric strength was significantly lower in symptomatic than in asymptomatic legs: ؊11 to ؊13% for extensor strength and ؊7 to ؊16% for flexor strength (P < 0.0001 for both) in men, and ؊9 to ؊17% (P ‫؍‬ 0.029) for extensor strength, and ؊10 to ؊21% (P ‫؍‬ 0.049) for flexor strength in women. Similar observations were made for pain frequency strata. Extensor and flexor strength were not significantly different across K/L grade strata in asymptomatic legs in either sex (P > 0.12). However, strength normalized to body weight was lower at higher K/L grades in both sexes (P < 0.02) because the body mass index was greater in participants with more advanced radiographic disease. Conclusion. Knee symptoms (i.e., pain) appear to be the relevant determinant of isometric knee extensor and flexor strength in KOA, whereas no direct association between strength and radiographic severity was observed. These findings suggest that the reduction in thigh muscle strength in KOA is related to pain but not to the structural (radiographic) disease status.

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Isometric muscle force measurement for clinicians treating patients with osteoarthritis of the knee

Cited by 52 publications

References 35 publications

Correlation between the knee adduction torque and medial contact force for a variety of gait patterns

Correlation between the knee adduction torque and medial contact force for a variety of gait patterns

Evaluation of potentially modifiable physical factors as predictors of health status in knee osteoarthritis patients referred for physical therapy

Association of Thigh Muscle Strength With Knee Symptoms and Radiographic Disease Stage of Osteoarthritis: Data From the Osteoarthritis Initiative

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