A Physical Therapist-Administered Physical Activity Intervention After Total Knee Replacement: Protocol for a Randomized Controlled Trial

Evaluating the diagnostic accuracy of a screening tool for low physical activity in independently ambulating adults with knee osteoarthritis: A prospective cohort study

BACKGROUND AND PURPOSE

Patients with knee osteoarthritis (OA) can benefit from resistance training exercises, range of motion and flexibility maintenance, and low-load aerobic exercises, as per the relevant clinical guidelines. However, certain patients might be unable to progress to higher physical levels despite such physical therapy programs. This study aimed to evaluate the diagnostic accuracy of a screening tool for determining physical activity levels in individuals with OA undergoing standard physical therapy regularly, using likelihood ratios and predictive values.

METHOD

This prospective observational study included 135 patients undergoing standard physical therapy for OA from six medical facilities. The primary outcome was low physical activity or moderate to high physical activity levels based on 1-month Self-Rating Frenchay activities index scores. Backward elimination was used to perform binomial logistic regression analysis after identifying the independent variables in a univariate logistic regression analysis. Among the independent variables adopted in the logistic regression model, receiver operating characteristic analysis using Youden's index was performed for quantitative variables, which were converted to binary values at the cut-off points. Subsequently, the clinical prediction rule (CPR) was derived.

RESULTS

According to the binomial logistic regression analysis, age, knee flexion muscle strength, and visual analog scale (VAS) were risk factors for low physical activity, and the CPR was derived from these variables. The pre-test probability of the low physical activity group was 37.0% (50 out of 135 participants). For a total CPR score of three points (one point for each item: age ≤69 years, knee flexion muscle strength ≤0.36 Nm/kg, and VAS ≥33 mm), the positive likelihood ratio was 13.60 and the post-test probability increased to 88.9%.

DISCUSSION

The CPR identified patients who might not benefit from the standard physical therapy program. This screening tool could improve patient management, allowing for more tailored approaches in physical therapy programs.

Goal setting in physiotherapy-led adult musculoskeletal care: A scoping review

INTRODUCTION

Goal setting is a key part of rehabilitation across various fields of physiotherapy. It is less clear what evidence exists to underpin its effectiveness and to practically guide its use within musculoskeletal physiotherapy.

OBJECTIVES

This scoping review provides an overview of current research regarding goal setting in adult physiotherapy-led musculoskeletal care with three aims: 1) to identify and analyse any gaps in the literature, 2) to identify relevant features of goal setting theory and 3) to make recommendations for future research. The principal research question was what does the literature tell us about the role of goal setting for adults over the age of 18 with musculoskeletal pain accessing outpatient physiotherapy services?

INCLUSION CRITERIA

The population, concept and context framework was used to define the inclusion criteria. Key definitions were adults over the age of 18 with musculoskeletal conditions, goal setting, and physiotherapy-led interventions.

METHODS

This scoping review followed the guidance set out by the Joanna Briggs Institute Manual for Evidence Synthesis. Allied and Complementary Medicine Database, Cumulative Index to Nursing and Allied Health Literature Plus with Full Text, MEDLINE, American Psychological Association PsycInfo and the Cochrane Database of Systematic Reviews, Protocols and Trials were searched using pre-defined search criteria. Data were extracted from screened full-text articles and presented in basic statistical and narrative form.

RESULTS

41 articles were included in the review. Several broad themes and research methods were identified. The nature of the studies suggested that the clinical application of goal setting is complex and the depth of understanding is limited. Most studies suggested that goal setting is feasible and has a positive impact on outcomes. A common finding was a lack of clear definitions regarding goal setting terminology and approaches. Study samples were generally defined by biomedical categories, suggesting a pathoanatomical approach to researching a cognitive construct. Theoretical underpinning was lacking in many studies. No frameworks guiding goal setting in physiotherapy-led musculoskeletal rehabilitation have been identified.

CONCLUSIONS

Goal setting is a popular tool within musculoskeletal outpatient physiotherapy. Further research is required to clarify its efficacy and provide guidance on its role and application in clinical practice.

Comparing an Expanded Versus Brief Telehealth Physical Therapy Intervention for Knee Osteoarthritis: Study Protocol for the Delaware PEAK Randomized Controlled Trial

OBJECTIVE

The purpose of this study is to investigate whether a remotely delivered physical therapist intervention increases physical activity (PA) over 12 weeks, compared to existing web-based resources, in adults with knee osteoarthritis (OA).

METHODS

This will be a single-center, randomized controlled trial with 2 parallel arms: (1) the Expanded Intervention (Delaware PEAK [Physical Exercise and Activity for Knee osteoarthritis]), which includes five 45- to 60-minute video conference-based sessions of supervised exercise (strengthening exercises, step goals) that are remotely delivered over 12 weeks by a physical therapist, or (2) the Brief Intervention (control group), a website that includes prerecorded videos directing participants to web-based resources for strengthening, PA, and pain management for knee OA that are freely available online. The trial will enroll 100 participants who meet the National Institute for Health and Care Excellence (NICE) OA clinical criteria (≥45 years old, have activity-related knee pain, have no morning stiffness or it lasts ≤30 minutes), reside in the contiguous US (excluding Alaska and Hawaii), and are seeking to be more physically active. Outcomes include PA (time in moderate-to-vigorous exercise and light exercise, steps/day), sedentary behaviors, treatment beliefs, and self-efficacy for exercise. Our primary outcome is moderate-to-vigorous PA (MVPA). Outcomes will be measured at baseline, 12 weeks, and 24 weeks.

IMPACT

This protocol focuses on the remote delivery of physical therapy via telehealth to adults with knee OA and comes at a critical time, as the burden of inactivity is of particular concern in this population. If successful, the findings of this work will provide strong support for the broad implementation of Delaware PEAK, highlight the utility of telehealth in physical therapy, and address the critical need to utilize exercise to manage adults with knee OA through physical therapists.

Knee joint biomechanics of patients with unilateral total knee arthroplasty during stationary cycling

Stationary cycling is typically recommended following total knee arthroplasty (TKA) operations. However, knee joint biomechanics during cycling remains mostly unknown for TKA patients. Biomechanical differences between the replaced and non-replaced limb may inform applications of cycling in TKA rehabilitation. The purpose of this study was to examine the knee joint biomechanics of TKA patients during stationary cycling. Fifteen TKA participants cycled at 80 revolutions per minute and workrates of 80 W and 100 W while kinematics (240 Hz) and pedal reaction forces using a pair of instrumented pedals (1200 Hz) were collected. A 2x2 (limb × workrate) repeated measures ANOVA was run with an alpha of 0.05. Peak knee extension moment (KEM, p = 0.034) and vertical pedal reaction force (p = 0.038) were significantly reduced in the replaced limbs compared to non-replaced limbs by 21.3% and 5.3%, respectively. Peak KEM did not change for TKA patients with the increased workrate (p = 0.750). However, both peak hip extension moment (p = 0.009) and ankle plantarflexion moment (p = 0.017) increased due to increased workrate. Patients following TKA showed similar decreases in peak KEM and vertical pedal reaction force in their replaced compared to non-replaced limbs, as previously seen in gait. Patients of TKA may rely on their hip and ankle extensors to increases in workrate. Increasing intensity by 20 W did not exacerbate any inter-limb differences for peak KEM and vertical PRF.

Does Activity-Based Rehabilitation With Goal Attainment Scaling Increase Physical Activity Among Younger Knee Arthroplasty Patients? Results From the Randomized Controlled ACTION Trial

BACKGROUND

Especially in younger knee osteoarthritis patients, the ability to perform physical activity (PA) after knee arthroplasty (KA) is of paramount importance, given many patients' wish to return to work and perform demanding leisure time activities. Goal Attainment Scaling (GAS) rehabilitation after KA may improve PA because it uses individualized activity goals. Therefore, our aim was to objectively quantify PA changes after KA and to compare GAS-based rehabilitation to standard rehabilitation.

METHODS

Data were obtained from the randomized controlled ACTION trial, which compares standard rehabilitation with GAS-based rehabilitation after total and unicompartmental KA in patients <65 years of age. At 2 time points, preoperatively and 6 months postoperatively, 120 KA patients wore a validated 3-dimensional accelerometer for 1 consecutive week. Data were classified as sedentary (lying, sitting), standing, and active (walking, cycling, running). Repeated measures analysis of variance was used to compare PA changes over time.

RESULTS

Complete data were obtained for 97 patients (58% female), with a mean age of 58 years (±4.8). For the total group, we observed a significant increase in PA of 9 minutes (±37) per day (P = .01) and significant decrease in sedentary time of 20 minutes (±79) per day (P = .02). There was no difference in standing time (P = .11). There was no difference between the control group and the intervention group regarding changes in PA, nor between the total KA group and the unicompartmental KA group.

CONCLUSION

We found a small but significant increase in overall PA after KA, but no difference between GAS-based rehabilitation and standard rehabilitation. Likely, enhanced multidisciplinary perioperative strategies are needed to further improve PA after KA.