Activity Levels in Healthy Older Adults: Implications for Joint Arthroplasty

Thorp, Laura E.; Orozco, Diego; Block, Joel A.; Sumner, Dale R.; Wimmer, Markus A.

doi:10.5402/2012/727950

Cited by 4 publications

(1 citation statement)

References 24 publications

(30 reference statements)

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“…Inclusion criteria were an original diagnosis of primary degenerative osteoarthritis, no history of neurological disorders or significant lumbar spine disease, at least 10 months post-operative [13–15] , the ability to perform activities that required a considerable amount of knee flexion (walking, sitting, and climbing stairs), activity in the workforce or at home, and participation in regular exercise. Control subjects with no evidence of symptomatic osteoarthritis and a radiographic K/L grade ≤ 2 were chosen from a larger cohort tested in our laboratory with available gait and sEMG data [16, 17] .…”

Section: Methodsmentioning

confidence: 99%

Comparison of Antagonist Muscle Activity During Walking Between Total Knee Replacement and Control Subjects Using Unnormalized Electromyography

Rojas

Foucher

Wimmer

2016

The Journal of Arthroplasty

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Background Although satisfactory outcomes have been reported following total knee replacement (TKR), full recovery of muscle strength and physical function is rare. We developed a relative activation index (RAI) to compare leg muscle activity from unnormalized surface electromyography (sEMG) between TKR and control subjects. Methods Nineteen TKR and 19 control subjects underwent gait analysis and sEMG. RAIs were calculated by dividing the average sEMG for two consecutive subphases of stance defined by the direction of the external sagittal plane moment (flexion or extension). Results RAIs and external moments indicate TKR subjects have less initial stance antagonist rectus femoris activity (p=0.004), greater middle stance antagonist biceps femoris activity (p<0.001), and less late stance agonist biceps femoris activity (p<0.001) than control subjects. Individuals with TKR demonstrate increased flexor muscle activation during weight bearing, potentially contributing to altered gait patterns found during stance phase of gait. Conclusion The RAI helps detail whether decreased external moments correspond to less agonist or more antagonist muscle activity to determine true muscle activity differences between subject groups. Identifying the mechanisms underlying altered muscle function both pre and post-TKR is critical for developing rehabilitation strategies to address functional deficits and disability found in this patient population.

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Section: Methodsmentioning

confidence: 99%

Comparison of Antagonist Muscle Activity During Walking Between Total Knee Replacement and Control Subjects Using Unnormalized Electromyography

Rojas

Foucher

Wimmer

2016

The Journal of Arthroplasty

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Measurement of physical activity in the pre- and early post-operative period after total knee arthroplasty for Osteoarthritis using a Fitbit Flex device

Twiggs

Salmon

Kolos³

et al. 2018

Medical Engineering & Physics

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The Pain Disability Questionnaire (PDQ): evaluating the efficacy of the psychosocial and functional subscales for 12-month post-treatment outcomes after total knee arthroplasty

Gray

Ramos

Howard

et al. 2017

Current Orthopaedic Practice

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Background: The Patient Disability Questionnaire (PDQ) has been shown to have good predictive validity for outcomes after total hip arthroplasty (TKA). However, the PDQ subscales (psychosocial and functional disability) have not been assessed independently. This study assesses 1-year surgical outcomes based on the PDQ’s psychosocial and functional disability subscale scores. Methods: The sample included 130 participants undergoing TKA. Physical and psychosocial measures included the PDQ, Knee Society Score (KSS), Western Ontario McMaster Arthritic Index (WOMAC), and the Short Form-36 Health Inventory (SF-36). Univariate correlations were used to cross-validate all subscales. Multivariate gamma and linear regressions were used to associate PDQ functional and psychosocial disability subscale scores with WOMAC and SF-36, 1 yr after TKA. Results: Poorer PDQ psychosocial scores were associated with being younger, black or Hispanic, and using Medicaid. Poorer functional disability scores were associated with being younger, female, black or Hispanic, and using Medicaid or without insurance. Multivariate regressions revealed that baseline PDQ psychosocial and functional disability were both significantly associated with 1-year WOMAC total scores and 1-year SF-36 Mental Composite Scores. Conclusions: The PDQ is useful in predicting 1-year outcomes for patients undergoing TKA. Worse baseline PDQ subscale scores indicated worse quality of life, more pain and stiffness of the joints, as determined by comparative WOMAC and SF-36 scores. Clinical implications from this study suggest screening patients before surgery to identify factors that could hinder recovery time or cause pain or function remission in adults undergoing TKA.

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Activity Levels in Healthy Older Adults: Implications for Joint Arthroplasty

Cited by 4 publications

References 24 publications

Comparison of Antagonist Muscle Activity During Walking Between Total Knee Replacement and Control Subjects Using Unnormalized Electromyography

Comparison of Antagonist Muscle Activity During Walking Between Total Knee Replacement and Control Subjects Using Unnormalized Electromyography

Measurement of physical activity in the pre- and early post-operative period after total knee arthroplasty for Osteoarthritis using a Fitbit Flex device

The Pain Disability Questionnaire (PDQ): evaluating the efficacy of the psychosocial and functional subscales for 12-month post-treatment outcomes after total knee arthroplasty

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