Neuromuscular exercise as treatment of degenerative knee disease

Thigh muscle composition changes in knee osteoarthritis patients during weight loss: Sex-specific analysis using data from osteoarthritis initiative

OBJECTIVES

Sex of patients with knee osteoarthritis (KOA) may impact changes in thigh muscle composition during weight loss, the most well-known disease-modifying intervention. We investigated longitudinal sex-based changes in thigh muscle quality during weight loss in participants with KOA.

METHODS

Using Osteoarthritis Initiative (OAI) cohort data, we included females and males with baseline radiographic KOA who experienced > 5 % reduction in Body Mass Index (BMI) over four years. Using a previously validated deep-learning algorithm, we measured Magnetic Resonance Imaging (MRI)-derived biomarkers of thigh muscles at baseline and year-4. Outcomes were the intra- and inter-muscular adipose tissue (Intra-MAT and Inter-MAT) and contractile percentage of thigh muscles between females and males. The analysis adjusted for potential confounders, such as demographics, risk factors, BMI change, physical activity, diet, and KOA status.

RESULTS

A retrospective selection of available thigh MRIs from KOA participants who also had a 4-year weight loss (>5 % of BMI) yielded a sample comprising 313 thighs (192 females and 121 males). Female and male participants exhibited a comparable degree of weight loss (females: -9.72 ± 4.38, males: -8.83 ± 3.64, P-value=0.060). However, the changes in thigh muscle quality were less beneficial for females compared to males, as shown by a less degree of longitudinal decrease in Intra-MAT (change difference,95 %CI: 783.44 mm2/4-year, 505.70 to 1061.19, P-value<0.001) and longitudinal increase in contractile percentage (change difference,95 %CI: -3.9 %/4-year, -6.5 to -1.4, P-value=0.019).

CONCLUSIONS

In participants with KOA and 4-year weight loss, the longitudinal changes in thigh muscle quality were overall beneficial but to a less degree in females compared to males. Further research is warranted to investigate the underlying mechanisms and develop sex-specific interventions to optimize muscle quality during weight loss.

Progressive Resistance Training or Neuromuscular Exercise for Hip Osteoarthritis : A Multicenter Cluster Randomized Controlled Trial

BACKGROUND

Exercise is recommended as first-line treatment for patients with hip osteoarthritis (OA). However, randomized controlled trials providing evidence for the optimal exercise type are lacking.

OBJECTIVE

To investigate whether progressive resistance training (PRT) is superior to neuromuscular exercise (NEMEX) for improving functional performance in patients with hip OA.

DESIGN

Multicenter, cluster-randomized, controlled, parallel-group, assessor-blinded, superiority trial. (ClinicalTrials.gov: NCT04714047).

SETTING

Hospitals and physiotherapy clinics.

PARTICIPANTS

160 participants with clinically diagnosed hip OA were enrolled from 18 January 2021 to 28 April 2023 and randomly assigned to PRT (n = 82) or NEMEX (n = 78).

INTERVENTION

Twelve weeks of PRT or NEMEX with 2 supervised 60-minute group sessions each week. The PRT intervention consisted of 5 high-intensity resistance training exercises targeting muscles at the hip and knee joints. The NEMEX intervention included 10 exercises and emphasized sensorimotor control and functional stability.

MEASUREMENTS

The primary outcome was change in the 30-second chair stand test (30s-CST). Key secondary outcomes were changes in scores on the pain and hip-related quality of life (QoL) subscales of the Hip Disability and Osteoarthritis Outcome Score (HOOS).

RESULTS

The mean changes from baseline to 12-week follow-up in the 30s-CST were 1.5 (95% CI, 0.9 to 2.1) chair stands with PRT and 1.5 (CI, 0.9 to 2.1) chair stands with NEMEX (difference, 0.0 [CI, -0.8 to 0.8] chair stands). For the HOOS pain subscale, mean changes were 8.6 (CI, 5.3 to 11.8) points with PRT and 9.3 (CI, 5.9 to 12.6) points with NEMEX (difference, -0.7 [CI, -5.3 to 4.0] points). For the HOOS QoL subscale, mean changes were 8.0 (CI, 4.3 to 11.7) points with PRT and 5.7 (CI, 1.9 to 9.5) points with NEMEX (difference, 2.3 [CI, -3.0 to 7.6] points).

LIMITATION

Participants and physiotherapists were not blinded.

CONCLUSION

In patients with hip OA, PRT is not superior to NEMEX for improving functional performance, hip pain, or hip-related QoL.

PRIMARY FUNDING SOURCE

Independent Research Fund Denmark.

Early Surgery Versus Exercise Therapy and Patient Education for Traumatic and Nontraumatic Meniscal Tears in Young Adults-An Exploratory Analysis From the DREAM Trial

OBJECTIVE: To compare the effect of early meniscal surgery versus exercise and education with the option of later surgery on pain, function, and quality of life in young patients with a meniscal tear, taking symptom onset into account. DESIGN: Randomized controlled trial. METHODS: In a randomized controlled trial (the "Danish RCT on Exercise versus Arthroscopic Meniscal surgery for young adults" [DREAM] trial), 121 patients aged 18-40 years with a magnetic resonance imaging-verified meniscal tear were randomized to surgery or 12 weeks of supervised exercise and patient education. For this exploratory study, the analyses were stratified by symptom onset (traumatic/nontraumatic). The main outcome was the difference in change after 12 months in the mean score of 4 Knee injury and Osteoarthritis Outcome Score subscales (KOOS4) covering pain, symptoms, function in sport and recreation, and quality of life. RESULTS: Forty-two patients (69%) in the exercise therapy group and 47 (78%) in the surgery group were categorized as having a traumatic tear. We observed no difference in change in the KOOS4 after 12 months between the 2 treatment groups for either traumatic tears (18.8 versus 16.0 in the surgery versus exercise therapy groups; adjusted mean difference, 4.8 [95% confidence interval, -1.7 to 11.2]) or nontraumatic tears (20.6 versus 17.3 in the surgery versus exercise therapy groups; adjusted mean difference, 7.0 [95% confidence interval, -3.7 to 17.7]). CONCLUSION: In patients with traumatic and nontraumatic meniscus tears, early meniscal surgery did not appear superior to exercise and education in improving pain, function, and quality of life after 12 months. Further research is needed to confirm the clinical applicability of these findings. J Orthop Sports Phys Ther 2024;54(5):1-10. Epub 22 February 2024. doi:10.2519/jospt.2024.12245.

Physiological and clinical effects of low-intensity blood-flow restricted resistance exercise compared to standard rehabilitation in adults with knee osteoarthritis-Protocol for a randomized controlled trial

INTRODUCTION

Osteoarthritis (OA) is a common disease with high socioeconomical costs. In Denmark, standard rehabilitation (SR) consists of a combination of patient education and supervised physical exercise involving a standardized neuromuscular training program. As an evidence-based alternative, high-load (>70% 1RM) resistance training (HIRT) has shown positive rehabilitation effects in knee-OA but may not be tolerated in all patients (~25%) due to knee joint pain. However, low-load resistance training (20-40% 1RM) with concurrent partial blood-flow restriction (BFR) appears to produce effects similar to HIRT yet involving reduced joint pain during and after exercise. The aim is to examine the effect of low-load BFR training compared to SR on pain, thigh muscle mass and muscle function in adults with knee-OA. We hypothesize that 12 weeks of BFR will lead to superior improvements in pain, muscle mass and mechanical muscle function compared to SR.

METHODS AND ANALYSIS

90 participants diagnosed with radiographic knee-OA will be randomized to either BFR or SR twice a week for 12 weeks. BFR will consist of two selected lower limb strength exercises performed with an inflated pneumatic occlusion cuff. Intervention procedures in SR consist of a full 8 weeks GLA:D course followed by 4 weeks of team group training. Primary outcome variable is the change in KOOS-Pain subscale from baseline to 12 weeks. Secondary outcome variables are changes in pain sensitivity, functional performance, muscle mass and mechanical muscle function. Intention-to-treat and per-protocol analyses will be conducted. One-way analysis of variance will be performed to evaluate between-group changes. Pre-to-post intervention comparisons will be analyzed using a mixed linear model. Regression analysis will be performed to evaluate potential associations between selected outcome variables.

Feasibility of pain informed movement program for people with knee osteoarthritis

Objective

To establish the feasibility of an intervention consisting of neuromuscular exercise, mind-body techniques, and pain neuroscience education (PNE), referred to as Pain Informed Movement in people with knee Osteoarthritis (KOA). This program has the potential to improve our understanding of intrinsic pain modulation and its role in the management of chronic pain.

Methods

This was a single-arm feasibility trial with a nested qualitative component. Primary outcome: complete follow-up. Inclusion criteria: age ≥40 years, KOA clinical diagnosis or meeting KOA NICE criteria, and pain intensity ≥3/10. The program consisted of 8-week in-person and at-home exercise sessions. PNE and mind-body techniques were provided as videos and integrated into the exercise sessions. Participants completed questionnaires and physical assessments including blood draws at baseline and program completion. Secondary feasibility outcomes: acceptability of the intervention, burden, rates of recruitment, compliance and adherence, and adverse events. A priori success criteria were identified. Participants were invited to an online focus group.

Results

19 participants were enrolled, with a complete follow-up rate of 74% (mean age 63.3 years (SD 10.5), 73% female), indicating modifications were necessary to proceed. All other success criteria were met. The focus groups revealed that the video content pertaining to the mind-body techniques would benefit from on screen demonstrations.

Conclusion

The Pain Informed Movement program is deemed feasible, with minor modifications needed to proceed. A pilot two-arm RCT will be conducted to establish the feasibility and explore potential effects of Pain Informed Movement compared to conventional neuromuscular exercise and standard OA education.

Pain Informed Movement for people with knee osteoarthritis: Protocol for a pilot randomized controlled trial

Objective

Conservative pain management strategies for knee osteoarthritis (KOA) have limited effectiveness and do not employ a pain-mechanism informed approach. Pain Informed Movement is a novel intervention combining mind-body techniques with neuromuscular exercise and pain neuroscience education (PNE), aimed at improving endogenous pain modulation. While the feasibility and acceptability of this program has been previously established, it now requires further evaluation in comparison to standard KOA care.

Design

This protocol describes the design of a pilot two-arm randomized controlled trial (RCT) with an embedded qualitative component. The primary outcome is complete follow-up rate. With an allocation ratio of 1:1, 66 participants (33/arm) (age ≥40 years, KOA diagnosis or meeting KOA NICE criteria, and pain intensity ≥3/10), will be randomly allocated to two groups that will both receive 8 weeks of twice weekly in-person exercise sessions. Those randomized to Pain Informed Movement will receive PNE and mind-body technique instruction provided initially as videos and integrated into exercise sessions. The control arm will receive neuromuscular exercise and standard OA education. Assessment will include clinical questionnaires, physical and psychophysical tests, and blood draws at baseline and program completion. Secondary outcomes are program acceptability, burden, rate of recruitment, compliance and adherence, and adverse events. Participants will be invited to an online focus group at program completion.

Conclusion

The results of this pilot RCT will serve as the basis for a larger multi-site RCT aimed at determining the program's effectiveness with the primary outcome of assessing the mediating effects of descending modulation on changes in pain.

Neuromuscular exercise and counseling for treating recurrent low back pain in female healthcare workers-Findings from a 24-month follow-up study of a randomized controlled trial

BACKGROUND

Female healthcare workers have a high prevalence of low back pain (LBP)-related sickness absence. Here, we report findings of a 24-month follow-up of a previously published 6-month randomized controlled trial (RCT).

METHODS

By adopting an RCT with 6 months of intervention and follow-up at 6, 12, and 24 months, we assessed the maintenance of changes in the effectiveness (LBP and fear of pain) of the interventions (neuromuscular exercise [NME], back-care counseling, both combined) using a generalized linear mixed model adjusted for baseline covariates. The incremental cost-effectiveness ratio was calculated in terms of quality-adjusted life years (QALY). A bootstrap technique was used to estimate the uncertainty around a cost-effectiveness acceptability curve.

RESULTS

Of the 219 females, 71% had data at 24 months. Between 6 and 24 months, LBP intensity (primary outcome) remained low in all intervention arms (-20% to -48%) compared to the control (-10% to -16%). Pain interfering with work remained low in the combined and exercise arms for up to 24 months. At 24 months, the total costs were lowest in the combined arm (€484 vs. €613-948, p < 0.001), as were the number of back-related sickness absence days (0.16 vs. 1.14-3.26, p = 0.003). The analysis indicated a 95% probability of the combined arm to be cost-effective per QALY gained at €1120.

CONCLUSIONS

Six months of weekly NME combined with four counseling sessions was cost-effective for treating LBP and the effect was maintained over 24 months.

TRIAL REGISTRATION

ClinicalTrials.gov, NCT01465698, 7/11/2011, prospective.

A self-managed exercise therapy program for wrist osteoarthritis: study protocol for a randomized controlled trial

BACKGROUND

Post-traumatic wrist osteoarthritis (OA) can eventually lead to pain, muscular weakness, and stiffness of the wrist, which can affect the function of the entire upper limb and reduce the quality of life. Although there is strong evidence that all patients with OA should be offered adequate education and exercises as a first-line treatment, an effective self-management program, including structured education and therapeutic exercises, has not yet been introduced for individuals with wrist OA. This trial aims to evaluate the effectiveness of an exercise therapy program with joint protective strategies to improve neuromuscular control (intervention group) compared to a training program with range of motion exercises (control group).

METHODS

This is a single-blinded randomized controlled trial (RCT) with two treatment arms in patients with symptomatic and radiographically confirmed wrist OA. The trial will be conducted at a hand surgery department. The participants will be randomly assigned either to a neuromuscular exercise therapy program or to a training program with range of motion exercises only. Participants in both groups will receive a wrist orthosis and structured education on wrist anatomy, pathophysiology, and joint protective self-management strategies. The programs consist of home exercises that will be performed twice a day for 12 weeks. The Patient-Rated Wrist Evaluation (PRWE) is the primary outcome measure of pain and function. Wrist range of motion (ROM), grip strength, the Numeric Pain Rating scale (NPRS), Disabilities of the Arm, Shoulder, and Hand (DASH), the General Self-Efficacy Scale (GSES), Global Rating of Change (GROC), and conversion to surgery are the secondary measures of outcome. Assessments will be performed at baseline and at 3, 6, and 12 months after baseline by a blinded assessor.

DISCUSSION

The upcoming results from this trial may add new knowledge about the effectiveness of a self-managed exercise therapy program on pain and function for individuals with wrist OA. If the present self-management program proves to be effective, it can redefine current treatment strategies and may be implemented in wrist OA treatment protocols.

TRIAL REGISTRATION

ClinicalTrials.gov, NCT05367817. Retrospectively registered on 27 April 2022. https://clinicaltrials.gov .

Fundamentals of osteoarthritis. Rehabilitation: Exercise, diet, biomechanics, and physical therapist-delivered interventions

Insights related to the pathogenesis of osteoarthritis (OA) have informed rehabilitative treatments that aim to mitigate the influence of several known impairments and risk factors for OA, with the goal to improve pain, function, and quality of life. The purpose of this invited narrative review is to provide fundamental knowledge to non-specialists about exercise and education, diet, biomechanical interventions, and other physical therapist-delivered treatments. In addition to summarizing the rationale for common rehabilitative therapies, we provide a synthesis of current core recommendations. Robust evidence based on randomized clinical trials supports exercise with education and diet as core treatments for OA. Structured, supervised exercise therapy is advised. The mode of exercise may vary but should be individualized. The dose should be based on an initial assessment, the desired physiological changes, and progressed when appropriate. Diet combined with exercise is strongly recommended and studies demonstrate a dose-response relationship between the magnitude of weight loss and symptom improvement. Recent evidence suggests the use of technology to remotely deliver exercise, diet and education interventions is cost-effective. Although several studies support the mechanisms for biomechanical interventions (e.g., bracing, shoe inserts) and physical therapist-delivered (passive) treatments (e.g., manual therapy, electrotherapeutic modalities) fewer rigorous randomized trials support their clinical use; these therapies are sometimes recommended as adjuncts to core treatments. The mechanisms of action for all rehabilitative interventions include contextual factors such as attention and placebo effects. These effects can challenge our interpretation of treatment efficacy from clinical trials, yet also provide opportunities to maximize patient outcomes in clinical practice. When evaluating rehabilitative interventions, the field may benefit from increased emphasis on research that considers contextual factors while evaluating mechanistic, longer-term, clinically-important and policy-relevant outcome measures.

Online and onsite supervised exercise therapy and education for individuals with knee osteoarthritis - A before and after comparison of two different care delivery models

OBJECTIVE

To compare the 3 and 12-month changes on pain, function and quality of life between online and onsite delivery of Good Life with Osteoarthritis in Denmark (GLA:D® ) in individuals with knee osteoarthritis (OA).

DESIGN

Non-inferior comparison of individuals with knee OA receiving physiotherapist-supervised online (TeleGLA:D) or onsite (GLA:D®) (12 exercise and 2 education sessions). The primary outcome was the baseline-to-3-month change on KOOS-12 summary score. Secondary outcomes were changes in KOOS-12 subscales pain, function and quality of life and pain intensity (Visual Analog Scale (VAS 0-100)) at 3 and 12 months; 40 m fast-paced walk and 30 s chair-stand at 3 months. Using mixed linear regressions, comparisons were adjusted for age, sex, BMI, comorbidities and number of knees and hips with OA.

RESULTS

Over a 1-year period (May 2020-May 2021), we included data from 3789 participants (3701 GLA:D®; 88 TeleGLA:D). At 3 months, TeleGLA:D showed non-inferior change-scores to GLA:D® on KOOS-12 summary score; adjusted mean difference (90% Confidence Intervals (CI)) -2.40 (-5.55 to 0.75). For secondary outcomes, there was a statistically significant difference in change-scores, favouring TeleGLA:D in gait speed; adjusted mean difference (90%CI) 0.23 m/s (0.18-0.27). TeleGLA:D remained non-inferior to GLA:D® at 12 months.

CONCLUSIONS

Online delivery of physiotherapist-supervised neuromuscular exercise and education for individuals with knee OA may be non-inferior to traditional onsite delivery in reducing pain and improving function and quality of life. The wide confidence intervals, baseline imbalance, loss to follow-up and the non-randomized design highlight the need for a confirmatory randomized controlled trial.

An invigorating journey towards better function and well-being: A qualitative study of knee osteoarthritis patients' experiences with an online exercise and education intervention

Objective

To explore what it means for patients with knee osteoarthritis (OA) to engage in online delivered exercise and education.

Method

We combined participant observations and focus group interviews with knee OA patients who engaged in an 8-week program (12 exercise sessions and 2 education sessions) delivered online. Data underwent a three-level phenomenological-hermeneutic interpretation inspired by Ricoeur's narrative and interpretation theory.

Results

We performed 17 participant observations during online group-based exercise sessions with twenty individuals with knee OA (12 females), median age 71 years (range: 48 to 81), and five focus group interviews with fifteen of the individuals. The following three themes emerged from the data analysis: 1. Exercise engagement portrays an experience of ownership of the exercise-based treatment, leading to better function and well-being and raising hope for the future 2. A good start but only halfway supported portrays perceived well-guided in performing knee OA exercise, however also some unmet support needs in the online format, and 3. Beneficial peer companionship with online constraints portrays a socially engaging peer forum that, at times, was limited by the online format.

Conclusions

This phenomenological-hermeneutic study reflects that supervised online exercise and education facilitate identity mobility, potentially increasing self-efficacy to adopt weekly exercise habits in patients with knee OA. However, the program may benefit from enabling a more interactive approach between peer participants and combining the online format with physical group classes. Moreover, further individualization and focus on a gradual approach toward self-management are encouraged.

Implementation of the Good Life with osteoArthritis in Denmark (GLA:D®) program via telehealth in Australia: A mixed-methods program evaluation

INTRODUCTION

We aimed to evaluate the implementation of the Good Life with osteoArthritis in Denmark (GLA:D^®) program via telehealth in Australia using Reach, Effectiveness, Adoption, Implementation, and Maintenance Qualitative Evaluation for Systematic Translation framework.

METHODS

Using a convergent mixed-methods design, semi-structured one-on-one interviews with physiotherapist adopters and nonadopters of GLA:D^® via telehealth were analyzed thematically alongside the examination of registry data (1 March 2020-10 February 2022) from patients with hip or knee osteoarthritis completing GLA:D^® via telehealth (telehealth-only) or combined with in-person care (hybrid). Effectiveness was determined as changes from baseline to 3-month follow-up (mean differences, 95% confidence intervals, effect size) for Knee injury and Osteoarthritis Outcome Score (KOOS-12)/Hip disability and Osteoarthritis Outcome Score-12 (HOOS-12), and chair stand test. Group- and individual-level changes were compared to published minimally clinically important change scores.

RESULTS

Twenty-three interviews (12 adopters, 11 nonadopters) found key barriers/facilitators to reach and adoption, high perceived effectiveness, and strategies to support sustainability. Of 2612 registered patients, 85 (3%) and 115 (4%) completed GLA:D^® via telehealth-only or hybrid model, respectively. Most effectiveness outcomes were associated with moderate-large improvements. Group-level changes exceeded minimally clinically important change values for KOOS/HOOS-quality of life and chair stand test. Nearly two out of three patients reached a minimally clinically important change for KOOS/HOOS-quality of life. With telehealth-only and hybrid delivery, 99% (n = 82) and 85% (n = 97) were satisfied/very satisfied. Physiotherapist adoption was limited (n = 128, 6%).

DISCUSSION

GLA:D^® delivered via telehealth is effective, had high patient satisfaction, and was perceived positively by physiotherapist adopters. Addressing low reach and adoption requires further implementation strategies to facilitate greater telehealth opportunities for patients and physiotherapists.

Levothyroxine use and longitudinal changes in thigh muscles in at-risk participants for knee osteoarthritis: preliminary analysis from Osteoarthritis Initiative cohort

BACKGROUND

We examined the association between levothyroxine use and longitudinal MRI biomarkers for thigh muscle mass and composition in at-risk participants for knee osteoarthritis (KOA) and their mediatory role in subsequent KOA incidence.

METHODS

Using the Osteoarthritis Initiative (OAI) data, we included the thighs and corresponding knees of participants at risk but without established radiographic KOA (baseline Kellgren-Lawrence grade (KL) < 2). Levothyroxine users were defined as self-reported use at all annual follow-up visits until the 4th year and were matched with levothyroxine non-users for potential confounders (KOA risk factors, comorbidities, and relevant medications covariates) using 1:2/3 propensity score (PS) matching. Using a previously developed and validated deep learning method for thigh segmentation, we assessed the association between levothyroxine use and 4-year longitudinal changes in muscle mass, including cross-sectional area (CSA) and muscle composition biomarkers including intra-MAT (within-muscle fat), contractile percentage (non-fat muscle CSA/total muscle CSA), and specific force (force per CSA). We further assessed whether levothyroxine use is associated with an 8-year risk of standard KOA radiographic (KL ≥ 2) and symptomatic incidence (incidence of radiographic KOA and pain on most of the days in the past 12 months). Finally, using a mediation analysis, we assessed whether the association between levothyroxine use and KOA incidence is mediated via muscle changes.

RESULTS

We included 1043 matched thighs/knees (266:777 levothyroxine users:non-users; average ± SD age: 61 ± 9 years, female/male: 4). Levothyroxine use was associated with decreased quadriceps CSAs (mean difference, 95%CI: - 16.06 mm²/year, - 26.70 to - 5.41) but not thigh muscles' composition (e.g., intra-MAT). Levothyroxine use was also associated with an increased 8-year risk of radiographic (hazard ratio (HR), 95%CI: 1.78, 1.15-2.75) and symptomatic KOA incidence (HR, 95%CI: 1.93, 1.19-3.13). Mediation analysis showed that a decrease in quadriceps mass (i.e., CSA) partially mediated the increased risk of KOA incidence associated with levothyroxine use.

CONCLUSIONS

Our exploratory analyses suggest that levothyroxine use may be associated with loss of quadriceps muscle mass, which may also partially mediate the increased risk of subsequent KOA incidence. Study interpretation should consider underlying thyroid function as a potential confounder or effect modifier. Therefore, future studies are warranted to investigate the underlying thyroid function biomarkers for longitudinal changes in the thigh muscles.

Association Between Isokinetic Knee Strength Characteristics and Single-Leg Hop Performance In Healthy Young Participants

Objective

The purpose of this study was to determine the extent to which the mean peak moment (MPM) of knee flexors and extensors could predict performance in a group of healthy individuals.

Methods

Eighty-four healthy individuals-32 men and 52 women (mean age, 22.1 ± 3 years; range, 18-35 years)-participated in this study. Isokinetic unilateral concentric knee flexor and extensor MPM was assessed isokinetically at angular velocities of 60°/s and 180°/s. Functional performance was assessed using the single hop of distance (SHD).

Results

Positive moderate to good statistically significant correlations (r = .636 to r = .673) were found between knee flexor and extensor MPM at 60°/s and 180°/s for the SHD test. Knee flexor and extensor MPMs are strong predictors for the SHD test at 60°/s and 180°/s (R2 = .40 to R2 = .45).

Conclusion

Knee flexor and extensor strength was substantially correlated with SHD.

Associations between changes in physical activity and perceived social exclusion and loneliness within middle-aged adults - longitudinal evidence from the German ageing survey

BACKGROUND

Previous research showed negative associations between physical activity and loneliness in older adults. However, information on associations among middle-aged adults is scarce. In this prognostic factor study, we investigated if starting or stopping to follow the WHO physical activity recommendations was associated with changes in perceived social exclusion and loneliness in this age bracket.

METHODS

We used longitudinal representative data of participants aged 40 to 64 years from the German Ageing Survey waves in 2014 and 2017 (analytical sample = 4,264 observations, 54% women). Perceived social exclusion was investigated with the scale from Bude and Lantermann. Loneliness was quantified with the 6-items loneliness scale from De Jong Gierveld. Information from the International Physical Activity Survey items on the time spend in moderate and vigorous physical activity per week was dichotomized. Participants were coded as either following or not following the WHO´s physical activity recommendations of spending at least 150 min of moderate, 75 min of vigorous or an appropriated combination of physical activity per week. We investigated the within (individual) association between starting and stopping to follow WHO´s physical activity recommendations and perceived social exclusion as well as loneliness in asymmetric fixed effects regressions. Analyses were adjusted for age, marital status, employment status, social-network size, general self-efficacy, depressive symptoms, self-rated health, BMI, comorbidities, and physical functioning (SF-36).

RESULTS

Stopping to follow the physical activity recommendations from the WHO was associated with perceived social exclusion (ß= 0.09 p = 0.04) but not with loneliness (ß=-0.01, p = 0.71). Starting to follow the WHO physical activity recommendations was neither associated with social exclusion (ß=-0.02, p = 0.54) nor with loneliness (ß=-0.01, p = 0.74) in adjusted asymmetric fixed effects regressions.

CONCLUSION

In middle-aged adults, longitudinal associations were found for physical activity and perceived social exclusion. Perceived social exclusion may be prevented by maintaining at least 150 min of moderate physical activities per week, which is the WHO physical activity recommendation. Future research should investigate moderators and mediators in the association between physical activity and social exclusion as well as loneliness.

Positive effects of neuromuscular exercises on pain and active range of motion in idiopathic frozen shoulder: a randomized controlled trial

BACKGROUND AND OBJECTIVES

Frozen shoulder (FS) is characterized by pain and significant loss of active and passive shoulder motion. Strengthening exercises are among the standard exercises used for FS. Neuromuscular exercise (NME) effectively improved pain and the range of motion in shoulder. However, no prior research has looked into the effects of NME compared to strengthening exercises in FS rehabilitation. The aim of the present study was to evaluate the effects of NME compared to strengthening exercises on pain and active range of motion (AROM) in individuals with idiopathic frozen shoulder.

METHODS

Forty individuals with idiopathic frozen shoulder were randomly assigned to either the experimental group (NME with regular physical therapy, n = 20) or the control group (strengthening exercises with regular physical therapy, n = 20). In both groups, the interventions were performed once a day, 5 days a week for 8 weeks. Pain scores on the visual analogue scale (VAS) and AROM of the shoulder were assessed at baseline and after the 8-week treatment. The primary analysis was the group × time interaction.

RESULTS

Two-by-two mixed analysis of variance (ANOVA) revealed a significant group × time interaction for VAS (F = 29.67; p < 0.01); AROM in flexion (F = 12.05; p < 0.01), internal rotation (F = 6.62; p < 0.05) and external rotation (F = 16.93; p < 0.01) in favor of the experimental group. The two-by-two mixed ANOVA revealed a significant main effect of time for VAS (F = 1648.47; p < 0.01); AROM in flexion (F = 591.70; p < 0.01), extension (F = 114.57; p < 0.01), abduction (F = 1602.04; p < 0.01), internal rotation (F = 664.14; p < 0.01) and external rotation (F = 1096.92; p < 0.01). No other significant differences were found.

CONCLUSIONS

NME is superior to strengthening exercises in terms of pain and AROM of shoulder flexion, internal rotation and external rotation in individuals with idiopathic FS. NME could be used to treat individuals with FS.

TRIAL REGISTRATION

Trial registration number: ChiCTR2100054453. Registration date: 17/12/2021.

Movement retraining programme in young soccer and rugby football players: A feasibility and proof of concept study

INTRODUCTION

Movement screening to identify abnormal movement patterns can inform development of effective interventions. The primary objective of this study was to evaluate the feasibility of using a movement screening tool in combination with a tailored movement control retraining programme in young soccer and rugby football players. A secondary objective was to investigate changes in movement control patterns post-intervention, to provide proof of concept (PoC) for movement retraining.

METHODS

52 male amateur players, including 34 soccer players (mean age 15 ± 2 years) and 18 rugby players (mean age 15 ± 1 years) participated. They were screened for movement control ability using a shortened version of the Hip and Lower Limb Movement Screening (Short-HLLMS) and completed an eight-week movement control retraining programme. Evaluation of feasibility included consent from players invited, adherence, attendance at the exercise sessions, drop-out and adverse events. Short-HLLMS total score and The Copenhagen Hip and Groin Outcome Score (HAGOS) were analysed to provide PoC for retraining movement control.

RESULTS

feasibility outcomes were favourable. Significant statistical changes occurred post-intervention in the Short-HLLMS total score (paired-samples t-test) and in three HAGOS subscales (symptoms, physical function in daily living and in sport and recreation) (Wilcoxon-Signed Rank Test) in both groups.

CONCLUSIONS

Feasibility of using the Short-HLLMS in combination with a movement control retraining programme in soccer and rugby players was promising. The data provided PoC for the potential application of a shortened version of the HLLMS to evaluate changes in movement control and to inform targeted motor control programmes.

Effect of functional weightbearing versus non-weightbearing quadriceps strengthening exercise on contact force in varus-malaligned medial knee osteoarthritis: A secondary analysis of a randomized controlled trial

BACKGROUND

Knee osteoarthritis progression may be related to altered knee loads, particularly in those with varus malalignment. Using randomized controlled trial data, this secondary analysis of complete datasets (n = 67) compared the effects of a functional weightbearing (WB) and non-weightbearing quadriceps strengthening exercise (NWB) program on measures of medial tibiofemoral joint contact force (MTCF) during walking.

METHODS

Participants aged ≥50 years and with medial knee osteoarthritis and varus malalignment were randomly allocated to a 12-week, home-based, physiotherapist-prescribed exercise program comprised of WB exercises (n = 31), or NWB exercise (n = 36). Three-dimensional lower-body motion, ground reaction forces, and surface electromyograms from six lower-limb muscles were acquired during walking at baseline and at 12-weeks follow-up. An electromyogram-informed neuromusculoskeletal model estimated bodyweight (BW) normalized MTCF (peak and impulse), including external and muscular contributions to MTCF.

RESULTS

There was no between-group difference in the change in peak MTCF (-0.02 [-0.12, 0.09] BW) or MTCF impulse (-0.01 [-0.06, 0.03] BW·s). There was a between-group difference in the muscle contribution to peak MTCF (-0.08 [-0.15, -0.00] BW) and MTCF impulse (-0.04 [-0.08, -0.00] BW·s), whereby the muscle contribution reduced more in the NWB group over time compared to the WB group. There was also a between group-difference in the external contribution to peak MTCF (0.09 [0.01, 0.18] BW), but this reduced more in the WB group than in the NWB group.

CONCLUSIONS

Our findings suggest no difference in MTCF between the two exercise programs, but differences in the contribution to MTCF between the two exercise programs were observed in those with medial knee osteoarthritis and varus malalignment.

Influence of Self-Reported Knee Instability on Outcomes Following Education and Exercise: A Cohort Study of 2,466 Patients With Knee Osteoarthritis

OBJECTIVE

To study the influence of self-reported knee instability on changes in knee pain and gait speed following patient education and supervised exercise therapy in patients with knee osteoarthritis (OA).

METHODS

We included patients enrolled in the Good Life With Osteoarthritis in Denmark (GLA:D) program, an 8-week education and supervised neuromuscular exercise program. Patients were classified into 4 groups according to their level of self-reported knee instability (never; rarely; sometimes; most of the time or all the time). Knee pain intensity was evaluated on a 0-100 mm scale and gait speed from the 4 × 10 meters fast-paced walk test at baseline and after the program. Using linear regression, we examined the association between knee instability and the change in pain and gait speed, respectively. Sex, age, body mass index, physical activity level, and previous knee surgery were covariates in adjusted models.

RESULTS

Among 2,466 patients with knee OA, mean baseline pain and gait speed varied between 38-59 mm and 1.39-1.56 meters/second in patients experiencing no instability and patients experiencing instability most or all the time, respectively. All instability groups improved in pain and gait speed. Compared to the no instability group, patients reporting instability most or all the time experienced larger improvements in pain (4.3 mm [95% confidence interval 1.2, 7.5]), while no difference between instability groups was found for gait speed.

CONCLUSION

Knee OA patients with self-reported instability seem to benefit even more from a patient education and supervised exercise therapy program than OA patients without instability.

Role of Thigh Muscle Changes in Knee Osteoarthritis Outcomes: Osteoarthritis Initiative Data

Background Longitudinal data on the association of quantitative thigh muscle MRI markers with knee osteoarthritis (KOA) outcomes are scarce. These associations are of clinical importance, with potential use for thigh muscle-directed disease-modifying interventions. Purpose To measure KOA-associated longitudinal changes in MRI-derived muscle cross-sectional area (CSA) and adipose tissue and their association with downstream symptom worsening and knee replacement (KR). Materials and Methods In a secondary analysis of the Osteoarthritis Initiative multicenter prospective cohort (February 2004 through October 2015), knees of participants with available good-quality thigh MRI scans at baseline and at least one follow-up visit were included and classified as with and without KOA according to baseline radiographic Kellgren-Lawrence grade of 2 or higher and matched for confounders with use of propensity score matching. An automated deep learning model for thigh MRI two-dimensional segmentation was developed and tested. Markers of muscle CSA and intramuscular adipose tissue (intra-MAT) were measured at baseline and 2nd- and 4th-year follow-up (period 1) and compared between knees with and without KOA by using linear mixed-effect regression models. Furthermore, in knees with KOA, the association of period 1 changes in muscle markers with risk of KR (Cox proportional hazards) and symptom worsening (mixed-effect models) during the 4th to 9th year (period 2) was evaluated. Results This study included 4634 matched thighs (2317 with and 2317 without KOA) of 2344 participants (mean age, 62 years ± 9 [SD]; 1292 women). Compared with those without, knees with KOA had a decrease in quadriceps CSA (mean difference, -8.21 mm2/year; P = .004) and an increase in quadriceps intra-MAT (1.98 mm2/year; P = .007). Decreased CSA and increased intra-MAT of quadriceps during period 1 was predictive of downstream (period 2) KOA symptom worsening (Western Ontario and McMaster Universities Osteoarthritis Index total score: odds ratio, 0.24 [negative association] [P < .001] and 1.38 [P = .012], respectively). Quadriceps CSA changes were negatively associated with higher future KR risk (hazard ratio, 0.70; P < .001). Conclusion Knee osteoarthritis was associated with longitudinal MRI-derived decreased quadriceps cross-sectional area and increased intramuscular adipose tissue. These potentially modifiable risk factors were predictive of downstream symptom worsening and knee replacement. Clinical trial registration no. NCT00080171 © RSNA, 2022 Online supplemental material is available for this article.

Progressive resistance training compared to neuromuscular exercise in patients with hip osteoarthritis and the additive effect of exercise booster sessions: protocol for a multicentre cluster randomised controlled trial (The Hip Booster Trial)

INTRODUCTION

The primary aim of this randomised controlled trial is to investigate the effectiveness of 3 months of progressive resistance training (PRT) compared to neuromuscular exercise (NEMEX) on functional performance in patients with hip osteoarthritis (OA). Secondary aims are to investigate the effectiveness of exercise booster sessions (EBS) in prolonging the effects of the initial exercise interventions as well as to investigate the cost-effectiveness of PRT, NEMEX and EBS at 12-month follow-up.

METHODS AND ANALYSIS

This multicentre cluster randomised controlled trial will be conducted at hospitals and physiotherapy clinics across Denmark. A total of 160 participants with clinically diagnosed hip OA will be recruited. Participants will be cluster randomised to a 3-month intervention of either PRT or NEMEX and to receive EBS or not, resulting in four treatment arms.The primary outcome is change in functional performance, measured by the 30 s chair stand test at 3 months for the primary comparison and at 12 months for the EBS comparisons. Secondary outcomes include changes in 40 m fast-paced walk test, 9-step timed stair climb test, leg extensor muscle power and maximal strength, Hip disability and Osteoarthritis Outcome Score subscales, EuroQol Group 5-dimension, global perceived effect, physical activity and pain. Outcomes are measured at baseline, after the initial 3 months of intervention, and at 6-month, 9-month and 12-month follow-up. An intention-to-treat approach will be used for analysing changes in the primary and secondary outcome measures.

ETHICS AND DISSEMINATION

The trial has been approved by the Central Denmark Region Committee on Biomedical Research Ethics (Journal No 1-10-72-267-20) and registered at the Danish Data Protection Agency (Journal No 1-16-02-11-21). Results will be published in international peer-reviewed scientific journals.

TRIAL REGISTRATION NUMBER

NCT04714047.

Can genetics guide exercise prescriptions in osteoarthritis?

Osteoarthritis (OA) is the most common form of arthritis and has a multifactorial etiology. Current management for OA focuses on minimizing pain and functional loss, typically involving pharmacological, physical, psychosocial, and mind-body interventions. However, there remain challenges in determining which patients will benefit most from which interventions. Although exercise-based interventions are recommended as first-line treatments and are known to be beneficial for managing both the disease and illness of OA, the optimal exercise “prescription” is unknown, due in part to our limited understanding of the precise mechanisms underlying its action. Here we present our perspective on the potential role of genetics in guiding exercise prescription for persons with OA. We describe key publications in the areas of exercise and OA, genetics and OA, and exercise and genetics, and point to a paucity of knowledge at the intersection of exercise, genetics, and OA. We suggest there is emerging evidence to support the use of genetics and epigenetics to explain the beneficial effects of exercise for OA. We identify missing links in the existing research relating to exercise, genetics, and OA, and highlight epigenetics as a promising mechanism through which environmental exposures such as exercise may impact OA outcomes. We anticipate future studies will improve our understanding of how genetic and epigenetic factors mediate exercise-based interventions to support implementation and ultimately improve OA patient care.

Muscle activation patterns around knee following neuromuscular training in patients with knee osteoarthritis: secondary analysis of a randomized clinical trial

Objective

To compare the effects of neuromuscular training (NMT) to a quadriceps strength training (QT) program on co-contraction index (CCI) of knee muscles in patients with knee osteoarthritis (OA).

Methods

Sixty-six knee OA patients with varus malalignment were recruited from the physiotherapy outpatient department of the university. After baseline measurements, they were randomly assigned into two groups: NMT (n = 33) and QT (n = 33). Patients in NMT group received neuromuscular exercises whereas QT group received conventional strengthening exercises for a period of 12 weeks, three times per week. Electromyographic (EMG) activity of quadriceps, hamstring and gastrocnemius muscle was evaluated during treadmill walking before and after 12 weeks of intervention period and CCI of medial quadriceps-medial hamstring (med QH), lateral quadriceps-lateral hamstring (lat QH), medial quadriceps-medial gastrocnemius (med QG) and, lateral quadriceps and lateral gastrocnemius (lat QG) was calculated.

Results

There was a significantly greater reduction in CCI of med QH (p = 0.02) and lat QH (p = 0.01) in the NMT group than the QT group. Whereas both NMT and QT led to statistically similar reductions in CCI of med QG (p = 0.08) and lat QG (p = 0.66).

Conclusion

Findings of this study suggest that NMT led to a greater reduction in CCI of knee muscles than QT which indicates that enhanced sensori-motor control attained by NMT could reduce knee loading in knee OA patients with varus malalignment.

Exercise for Osteoarthritis: A Literature Review of Pathology and Mechanism

Osteoarthritis (OA) has a very high incidence worldwide and has become a very common joint disease in the elderly. Currently, the treatment methods for OA include surgery, drug therapy, and exercise therapy. In recent years, the treatment of certain diseases by exercise has received increasing research and attention. Proper exercise can improve the physiological function of various organs of the body. At present, the treatment of OA is usually symptomatic. Limited methods are available for the treatment of OA according to its pathogenesis, and effective intervention has not been developed to slow down the progress of OA from the molecular level. Only by clarifying the mechanism of exercise treatment of OA and the influence of different exercise intensities on OA patients can we choose the appropriate exercise prescription to prevent and treat OA. This review mainly expounds the mechanism that exercise alleviates the pathological changes of OA by affecting the degradation of the ECM, apoptosis, inflammatory response, autophagy, and changes of ncRNA, and summarizes the effects of different exercise types on OA patients. Finally, it is found that different exercise types, exercise intensity, exercise time and exercise frequency have different effects on OA patients. At the same time, suitable exercise prescriptions are recommended for OA patients.

Evaluation eines mHealth unterstützten Heimübungsprogramms für Menschen mit Kniearthrose (mhexos)

Hintergrund Kniearthrose ist einer der Hauptgründe für Behinderungen und Mobilitätseinschränkungen bei älteren Menschen, die mit Leid und hohen Krankheitskosten verbunden sind. Nicht operative Therapien wie Übungstherapie, Maßnahmen zur Steigerung der körperlichen Aktivität und zur Unterstützung des Selbstmanagements können Schmerzen verringern sowie die Funktion und gesundheitsbezogene Lebensqualität verbessern. Entsprechende Heimübungsprogramme sind ein wichtiger Baustein der Therapie, die Adhärenz ist jedoch oft nicht ausreichend. Digitale Gesundheitsanwendungen sind, insbesondere unter den Bedingungen der aktuellen COVID-19-Pandemie, eine vielversprechende Möglichkeit, um Barrieren zu überwinden.

Ziel Untersuchung der Implementierbarkeit eines mHealth-Heimübungsprogramms für Patient*innen mit Kniearthrose (mhexos) in Hinblick auf Bedienbarkeit, Erfahrungen von Nutzer*innen, Nutzungsverhalten und der Veränderung gesundheitsbezogener Endpunkte.

Methode Patient*innen mit Kniearthrose führten das mHealth Heimübungsprogramm mhexos 4 Wochen lang durch. Die Umsetzung erfolgte über ein Tablet mit insgesamt 39 Übungsvideos zur Kräftigung, Balance und Koordination, die in 3 Schwierigkeitsstufen konfiguriert werden können. Über eine App wurden Daten zur Schmerzintensität und der selbst wahrgenommenen Belastung erfasst. Es wurden leitfadengestützte Interviews durchgeführt und Fragebögen zur Erfassung der Bedienbarkeit und der Erfahrungen der Nutzer*innen sowie zu gesundheitsbezogenen Endpunkten an 2 Messzeitpunkten eingesetzt.

Ergebnisse Es wurden 10 Patient*innen und 7 Therapeut*innen eingeschlossen. Das mHealth-Heimübungsprogramm konnte in die Praxis und den Alltag der Teilnehmenden implementiert werden. Die App wurde überwiegend als bedienungsfreundlich und motivierend eingeschätzt, die Therapietreue war mit einer Übungsfrequenz von 2,7 × pro Woche (SD 0,6) hoch. In den gesundheitsbezogenen Endpunkten zeigten sich im Interventionszeitraum kleine, klinisch und statistisch nicht signifikante Veränderungen.

Schlussfolgerung: mhexos scheint geeignet, Heimübungsprogramme für Menschen mit Kniearthrose unter den Rahmenbedingungen der Routineversorgung zu unterstützen. Für eine weitergehende Beurteilung der klinischen Wirksamkeit sind kontrollierte Studien nötig.

Early Surgery or Exercise and Education for Meniscal Tears in Young Adults

BACKGROUND: Surgery is commonly used to treat meniscal tears; however, to our knowledge, no randomized controlled trials (RCTs) have compared surgery with nonsurgical alternatives in young adults. We hypothesized that early meniscal surgery would be superior to a strategy of exercise and education with the option of surgery later if needed. METHODS: In this pragmatic parallel-group RCT, we enrolled young adults (18-40 years of age) with magnetic resonance imaging–verified meniscal tears eligible for surgery from seven Danish hospitals. Patients were randomly assigned (1:1) to surgery (partial meniscectomy or meniscal repair) or 12-week supervised exercise therapy and education with the option of surgery later if needed. The primary outcome was the difference in change from baseline to 12 months in the mean score of four Knee Injury and Osteoarthritis Outcome Score (KOOS4) subscales covering pain, symptoms, function in sport and recreation, and quality of life, ranging from 0 (worst) to 100 (best). RESULTS: We enrolled 121 young adults (mean age, 29.7 years; 28% were female). In total, 107 participants (88%) completed the 12-month follow-up; 16 participants (26%) from the exercise group crossed over to surgery, while 8 (13%) from the surgery group did not undergo surgery. Intention-to-treat analysis showed no statistically significant difference in change between groups from baseline to 12 months in KOOS4 scores (19.2 vs. 16.4 in the surgery vs. exercise groups; adjusted mean difference, 5.4 [95% confidence interval, −0.7 to 11.4]). No difference in serious adverse events was observed (four vs. seven in the surgery and exercise groups, respectively; P=0.40). Per-protocol and as-treated analyses yielded similar results. CONCLUSIONS: Our results suggest that among young, active adults with meniscal tears, a strategy of early meniscal surgery is not superior to a strategy of exercise and education with the option of later surgery. Both groups experienced clinically relevant improvements in pain, function, and quality of life at 12 months, and one of four from the exercise group eventually had surgery. (Funded by the Danish Council for Independent Research, IMK Almene Fond, Lundbeck Foundation, Spar Nord Foundation, Danish Rheumatism Association, Association of Danish Physiotherapists Research Fund, Research Council at Næstved-Slagelse-Ringsted Hospitals, and Region Zealand; ClinicalTrials.gov number, NCT02995551.)

Benefits and Mechanisms of Exercise Training for Knee Osteoarthritis

Knee osteoarthritis is a chronic degenerative disease. Cartilage and subchondral bone degeneration, as well as synovitis, are the main pathological changes associated with knee osteoarthritis. Mechanical overload, inflammation, metabolic factors, hormonal changes, and aging play a vital role in aggravating the progression of knee osteoarthritis. The main treatments for knee osteoarthritis include pharmacotherapy, physiotherapy, and surgery. However, pharmacotherapy has many side effects, and surgery is only suitable for patients with end-stage knee osteoarthritis. Exercise training, as a complementary and adjunctive physiotherapy, can prevent cartilage degeneration, inhibit inflammation, and prevent loss of the subchondral bone and metaphyseal bone trabeculae. Increasing evidence indicates that exercise training can improve pain, stiffness, joint dysfunction, and muscle weakness in patients with knee osteoarthritis. There are several exercise trainings options for the treatment of knee osteoarthritis, including aerobic exercise, strength training, neuromuscular exercise, balance training, proprioception training, aquatic exercise, and traditional exercise. For Knee osteoarthritis (KOA) experimental animals, those exercise trainings can reduce inflammation, delay cartilage and bone degeneration, change tendon, and muscle structure. In this review, we summarize the main symptoms of knee osteoarthritis, the mechanisms of exercise training, and the therapeutic effects of different exercise training methods on patients with knee osteoarthritis. We hope this review will allow patients in different situations to receive appropriate exercise therapy for knee osteoarthritis, and provide a reference for further research and clinical application of exercise training for knee osteoarthritis.

Cost-effectiveness of an 8-week supervised education and exercise therapy programme for knee and hip osteoarthritis: a pre-post analysis of 16 255 patients participating in Good Life with osteoArthritis in Denmark (GLA:D)

OBJECTIVES

To evaluate 1-year cost-effectiveness of an 8-week supervised education and exercise programme delivered in primary care to patients with symptomatic knee or hip osteoarthritis (OA).

DESIGN

A registry-based pre-post study linking patient-level data from the Good Life with osteoArthritis in Denmark (GLA:D) registry to national registries in Denmark.

SETTING AND PARTICIPANTS

16 255 patients with symptomatic knee or hip OA attending GLA:D.

INTERVENTION

GLA:D is a structured supervised patient education and exercise programme delivered by certified physiotherapists and implemented in Denmark.

OUTCOME MEASURES

Adjusted healthcare costs per Quality-Adjusted Life Year (QALY) gained from baseline to 1 year (ratio of change in healthcare costs to change in EuroQoL 5-Dimensions 5-Level questionnaire (EQ-5D)). All adjusted measures were estimated using a generalised estimating equation gamma regression model for repeated measures. Missing data on EQ-5D were imputed with Multiple Imputations (3 months: 23%; 1 year: 39 %).

RESULTS

Adjusted change in healthcare cost was 298€ (95% CI: 206 to 419) and 640€ (95% CI: 400 to 1009) and change in EQ-5D was 0.035 (95% CI: 0.033 to 0.037) and 0.028 (95% CI: 0.025 to 0.032) for knee and hip patients, respectively. Hence estimated adjusted healthcare costs per QALY gained was 8497€ (95% CI: 6242 to 11 324) for knee and 22 568€ (95% CI: 16 000 to 31 531) for hip patients. In patients with high compliance, the adjusted healthcare costs per QALY gained was 5438€ (95% CI: 2758 to 9231) for knee and 17 330€ (95% CI: 10 041 to 29 364) for hip patients. Healthcare costs per QALY were below conventional thresholds for willingness-to-pay at 22 804€ (20 000£) and 43 979€ (US$50 000), except the upper limit of the 95% CI for hip patients which was in between the two thresholds.

CONCLUSIONS

A structured 8-week supervised education and exercise programme delivered in primary care was cost-effective at 1 year in patients with knee or hip OA supporting large-scale implementation in clinical practice.

The Relationship Between Changes in Movement and Activity Limitation or Pain in People With Knee Osteoarthritis: A Systematic Review

OBJECTIVE

To report whether changes in knee joint movement parameters recorded during functional activities relate to change in activity limitation or pain after an exercise intervention in people with knee osteoarthritis (OA).

DESIGN

Etiology systematic review.

LITERATURE SEARCH

Four databases (MEDLINE, Embase, CINAHL, and AMED) were searched up to January 22, 2021.

STUDY SELECTION CRITERIA

Randomized controlled trials or cohort studies of exercise interventions for people with knee OA that assessed change in knee joint movement parameters (moments, kinematics, or muscle activity) and clinical outcomes (activity limitation or pain).

DATA SYNTHESIS

A descriptive synthesis of functional activities, movement parameters, and clinical outcomes.

RESULTS

From 3182 articles, 22 studies met the inclusion criteria, and almost all were of low quality. Gait was the only investigated functional activity. After exercise, gait parameters changed 26% of the time, and clinical outcomes improved 90% of the time. A relationship between group-level changes in gait parameters and clinical outcomes occurred 24.5% of the time. Two studies directly investigated an individual-level relationship, reporting only 1 significant association out of 8 correlations tested.

CONCLUSION

Most studies reported no change in gait-related movement parameters despite improvement in clinical outcomes, challenging the belief that changing movement parameters is always clinically important in people with knee OA. J Orthop Sports Phys Ther 2021;51(10):492-502. doi:10.2519/jospt.2021.10418.

Effects of real-time feedback during decline walking on kinematic and kinetic gait parameters in a healthy population: study protocol for a randomized trial - up and down

BACKGROUND

The control of the dynamic functional leg alignment (dFLA) and biomechanical load are important joint-related aspects regarding the development of osteoarthritis (OA). Research on level walking with feedback on load-related parameters has provided innovative treatment possibilities. With regard to walking on sloped surfaces, fundamental biomechanical knowledge exists. However, comprehensive data on the agreement of kinematics and kinetics of self-paced ramp versus sloped treadmill walking is lacking. Further, deeper insights into the control of the dFLA during decline walking and the usefulness of real-time feedback are missing.

METHODS/DESIGN

Thirty healthy participants aged between 18 and 35 years will be included. They will complete a three-dimensional gait analysis walking self-paced up and down on a 5-m ramp with a 10° inclination. Subsequently, speed-matched to ramp-up walking and self-paced 10° incline split-belt treadmill walking will be assessed. Afterwards, the participants will be observed under four different conditions of 10° declined walking on the same treadmill (a) self-paced walking, (b) self-paced walking with an internal focus of attention, (c) self-paced walking with real-time feedback, and (d) condition c speed-matched walking. The primary outcome parameter will be the frontal knee range of motion (fKROM). Secondary outcomes include the ground reaction force loading rate, spatial-temporal parameters, as well as sagittal, frontal and transversal kinematics, and kinetics for the lower extremities.

DISCUSSION

The findings aim at improving the understanding of the effects of real-time feedback on the control of the dFLA and lower limb loading. Following clinical practicable methods for effective feedback devices can be developed and evaluated. Additionally, the first dataset comparing kinematic and kinetic parameters for decline and incline ramp walking versus walking on an instrumented treadmill will be available for appropriate intervention planning.

TRIAL REGISTRATION

ClinicalTrials.gov NCT04763850 . Prospectively registered on 21 February 2021.

Effect of Neuromuscular Exercises on Strength, Proprioceptive Receptors, and Balance in Females with Multiple Sclerosis

Background:

Multiple sclerosis (MS) is the third most common cause of adult neurologic disabilities. The aim of this study was to determine the effect of 8 weeks of neuromuscular exercises on strength, proprioceptive receptors, and balance of women with MS.

Methods:

In this randomized controlled trial study, 20 female volunteers with relapsing-remitting MS were randomly assigned into the experimental group (n = 10) and control group (n = 10). Maximum muscular strength of knee extensor and flexor muscles, knee joint proprioceptive error (Biodex), and balance (Berg Balance Scale) was measured at baseline and after 8 weeks of neuromuscular exercise. The data were analyzed using paired t-test and independent t-test.

Results:

The results showed a significant improvement (P < 0.05) in the quadriceps strength, hamstring strength, proprioceptive receptor error, and the balance in the experimental group, but not in the control group. A significant difference was evident between the experimental and control groups in terms of strength, balance, and proprioceptive receptor error (P < 0.05).

Conclusions:

Neuromuscular exercise training is effective in improving balance, strength, and reducing the proprioceptive error in people with MS, and it could be recommended as modalities for these patients.

Willingness to Undergo Joint Surgery Following a First-Line Intervention for Osteoarthritis: Data From the Better Management of People With Osteoarthritis Register

OBJECTIVE

To assess the proportion of participants reconsidering their willingness to undergo surgery after 3 and 12 months. Secondary aims were to analyze and compare the characteristics of individuals willing and unwilling to undergo joint surgery for osteoarthritis (OA) before a first-line intervention, and to study the association between pain intensity, walking difficulties, self-efficacy, and fear of movement with the willingness to undergo surgery.

METHODS

This was an observational study based on Swedish register data. We included 30,578 individuals with knee or hip OA who participated in a first-line intervention including education and exercise.

RESULTS

Individuals willing to undergo surgery at baseline showed a higher proportion of men (40% versus 27%) and more severe symptoms and disability. Respectively, 45% and 30% of the individuals with knee and hip OA who were willing to undergo surgery at baseline became unwilling after the intervention. At the end of the study period (12 months), 35% and 19% of those with knee and hip OA, respectively, who were willing to undergo surgery at baseline became unwilling. High pain intensity, walking difficulties, and fear of movement were associated with higher odds of being willing to undergo surgery at both follow-ups, while increased self-efficacy showed the opposite association.

CONCLUSION

A first-line intervention for OA is associated with reduced willingness to undergo surgery, with a greater proportion among patients with knee OA than hip OA. Due to its temporal variability, willingness to undergo surgery should be used with care to deem surgery eligibility.

Exercise and education for community-dwelling older participants with knee osteoarthritis: a video-linked programme protocol based on a randomised controlled trial

Background

Neuromuscular and quadriceps exercises have been shown to be effective approaches to relieve pain and to improve function for patients with knee osteoarthritis. In this study, we aim to provide an informative feasible model in which therapeutic exercise and education will be undertaken with physiotherapy supervision and instruction via video link. We also aim to explore the relationship between program-induced pain alleviation/functional improvements and reduction in irritability, which might be mediated through program-induced psychosocial benefits.

Methods

In this proposed two-parallel group (neuromuscular exercise versus quadriceps exercise), single-blinded, randomised controlled trial, participants aged ≥50 years with osteoarthritic knee pain will undergo a 12-week intervention, comprising video-linked education, supervised exercises, and a 12-week follow-up. Seven measurements will be taken to collect longitudinal data. A generalised estimating equation will be used to establish the adjusted difference in effectiveness on pain, function, irritability, and psychosocial outcomes between participants undertaking neuromuscular exercises and those undertaking quadriceps exercises. The primary outcomes are overall average pain in the knee joint during walking, as assessed through the 11-point Numerical Pain Rating Scale, and the Western Ontario and McMaster Universities osteoarthritis index physical function subscale. Furthermore, pressure pain threshold and changes in self-report pain scores pre-, during, and post-exercise were also measured as an indication of irritability. In addition, both the 6-min walk test and a timed up & go test were used to assess walking function performance. Finally, patients’ emotions (e.g., fear and catastrophising), self-trust, needs in terms of disease knowledge, mental resilience, social support and health-related quality of life were investigated. Two four-wave cross-lagged models will be used to investigate directional relationships, aiming to investigate the complex mechanisms concerning the effects of exercise programmes.

Discussion

Through summarising the study’s strengths and limitations, this study may provide promising insights in terms of exercise therapy optimisation for people with knee osteoarthritis and/or other chronic pain within a psychosocial framework.

Trial registration

ChiCTR2100041978 (chictr.org.cn), January 10, 2021.

THE NEW INJURIES' RISK AFTER ACL RECONSTRUCTION MIGHT BE REDUCED WITH FUNCTIONAL TRAINING

Objective:

The objective of our study was to evaluate if functional training with the Functional Movement Screen (FMS) can reduce the risk of a new injury for patients that underwent an anterior cruciate ligament reconstruction (ACLR). Our hypothesis was that the functional training might reduce the risk of a new injury.

Methods:

Our training protocol consisted of six phases, each one lasting six weeks. It began two months after surgery. The study group was composed of 10 individuals that completed our protocol after ACLR. The control group consisted of 10 people that completed a regular ACLR rehabilitation protocol. The FMS was used to compare the study and control group performance. Patients with a score of 14 or less on the FMS were considered more likely to suffer an injury than those with a score higher than 14.

Results:

The study group average FMS score was 16.6 compared to the control group at 12.3. Functional training for ACLR rehabilitation added a statistically significant benefit (p < 0.0002) to reduce the risk of a new injury compared to regular protocol.

Conclusion:

Functional training may be considered an alternative to the regular ACLR rehabilitation to reduce the risk of a new injury before returning to sports. Level of Evidence III, Case control study.

Neuromuscular exercise for chronic musculoskeletal pain in older people: a randomised controlled trial in primary care in Hong Kong

Background

Exercise therapy is commonly prescribed by primary care physicians (PCPs) in the management of chronic musculoskeletal (MSK) pain.

Aim

To evaluate the clinical effectiveness of a supervised neuromuscular (NM) exercise programme in older people with chronic MSK pain.

Design and setting

This was a 12-week, two-arm, randomised controlled trial comparing 6 weeks of supervised NM exercise versus waiting list controls. The authors enrolled 72 participants with chronic MSK pain at seven public primary care clinics.

Method

Participants were randomly allocated in block sizes of 12 to the NM (n = 36) and control groups (n = 36) in a 1:1 ratio. Data were collected at baseline, 6, and 12 weeks. The primary outcome was the Brief Pain Inventory (BPI) pain severity score at 6 weeks post-intervention. Secondary outcomes included the BPI interference score; Pain Self-Efficacy Questionnaire (PSEQ), Short Form Health Survey (SF-12), 7-item Generalised Anxiety Disorder (GAD-7), and 9-item Patient Health Questionnaire (PHQ-9) scores; and functional measurements using the Timed-Up- and-Go test and handgrip strength.

Results

At 6 weeks, the NM group demonstrated a significantly greater improvement in the BPI pain severity score (between-group difference = −1.27; 95% confidence interval [CI] = −2.08 to −0.45; P<0.01), PSEQ (between-group difference = 6.5; 95% CI = 2.22 to 10.77; P<0.01), and SF-12 physical scores (between-group difference = 3.4; 95% CI = 0.05 to 6.75; P<0.05) compared with the control group. Statistically significant overall trends of improvement were also observed for the BPI interference and PHQ-9 scores.

Conclusion

NM exercise has the potential to reduce pain and improve self-efficacy and physical function in older people with chronic MSK pain. It can be an option for PCPs in exercise prescriptions.

Exercise therapy and patient education versus intra-articular saline injections in the treatment of knee osteoarthritis: an evidence-based protocol for an open-label randomised controlled trial (the DISCO trial)

Background

Knee osteoarthritis (OA) is a highly prevalent musculoskeletal condition causing pain, physical disability, and reduced quality of life. Exercise and patient education are non-pharmacological interventions for knee OA unanimously recommended as first-line treatments based on extensive research evidence. However, none of the numerous randomised controlled trials of exercise and education for knee OA has used adequate sham/placebo comparison groups because the ‘active’ ingredients are unknown. Designing and executing an adequate and ‘blindable placebo’ version of an exercise and education intervention is impossible. Therefore, using an open-label study design, this trial compares the efficacy of a widely used ‘state-of-art’ exercise and education intervention (Good Life with osteoarthritis in Denmark; GLAD) with presumably inert intra-articular saline injections on improvement in knee pain in patients with knee OA.

Methods

In this open-label randomised trial, we will include 200 patients with radiographically verified OA of the knee and randomly allocate them to one of two interventions: (i) 8 weeks of exercise and education (GLAD) or (ii) Intra-articular injections of 5 ml isotonic saline every second week for a total of 4 injections. Outcomes are taken at baseline, after 8 weeks of treatment (week 9; primary endpoint) and after an additional 4 weeks of follow-up (week 12). The primary outcome is change from baseline in the Knee Injury and Osteoarthritis Outcome Score questionnaire (KOOS) pain subscale score. Secondary outcomes include the Physical function in Activities of Daily Living, Symptoms, and Knee-related Quality of Life subscales of the KOOS, the patients’ global assessment of disease impact, physical performance tests, and presence of knee joint swelling.

Discussion

This current trial compares a presumably active treatment (GLAD) with a presumably inert treatment (IA saline injections). Both study interventions have well-established and anticipated similar effects on knee OA symptoms, but the underlying mechanisms are unknown. The interpretation of the results of this trial will likely be difficult and controversial but will contribute to a better understanding of the bias introduced in the effect estimation of classically unblindable exercise and education interventions for knee OA.

Trial registration

www.ClinicalTrials.govNCT03843931. Prospectively registered on 18 February 2019.

Applicability of Exercise and Education Programmes for Knee Osteoarthritis Management to Switzerland

Objectives: The aim of this study was to assess the applicability of six OARSI (Osteoarthritis Research Society International) approved exercise and education programmes for the conservative management of knee osteoarthritis to the Swiss health care system. Methods: The RE-AIM framework was used in this cross-sectional survey study to analyse the characteristics of the six exercise and education programmes. A survey was developed based on the RE-AIM dimensions, "Reach, Effectiveness, Adoption, Implementation, and Maintenance," for rating the applicability of the programmes (on a scale of 1 = "least applicable" to 10 = "most applicable"). Programme scores of ≥7 indicated applicability to the Swiss health care system. Nine selected physiotherapy experts for knee OA management in Switzerland were invited for the rating. Results: The six programmes were rated by six of the nine invited research experts with mean scores of between 5.9 and 9.45. Four programmes scored 7 or more. These four programmes all included supervised exercise sessions and education with the goal that the participants understand the diagnosis and the management of OA. The two lower rated programmes focused on exercise counselling or weight reduction. Conclusion: The programme with the highest scores consists of exercise and education and scored higher than 7 in all RE-AIM dimensions. Therefore, this programme is most applicable to the Swiss health care system as only a few adaptations would be needed for its successful implementation.

Changes in physical inactivity during supervised educational and exercise therapy in patients with knee osteoarthritis: A prospective cohort study

BACKGROUND

Physical inactivity is a global problem and patients with knee osteoarthritis (OA) are predisposed to inactivity and its health-related consequences. Current guidelines recommend exercise as primary treatment but whether this affects time spent physically inactive is unknown. The objective was to investigate changes in physical inactivity among individuals with knee OA following an educational and exercise program.

METHODS

Pragmatic prospective cohort study performed in six physical therapy clinics in Denmark offering a nationwide education and exercise program for knee OA. The program consists of physiotherapy guided education and group-based or home exercise sessions, performed biweekly for approximately eight weeks. The exercises target knee and hip joint stability as well as focus on increasing muscle strength. Primary outcome was time spent physically inactive (min/day), measured with a tri-axial accelerometer mounted on the lateral side of the thigh during the entire exercise program duration. OA symptoms were assessed using the Knee injury and Osteoarthritis Outcome Score (KOOS).

RESULTS

Thirty-two individuals with knee OA were analyzed. From baseline to post-intervention, no changes occurred in average time spent physically inactive (mean change: +16.2 min [95% CI -15.7 to 48.1]; P = 0.31), but statistically significant improvements in KOOS pain (+6.7 points [95% CI 2.3 to 11.0]; P = 0.0032) and KOOS function (+5.8 points [95% CI 1.9 to 9.7]; P = 0.0046) were found.

CONCLUSIONS

Participating and completing a widely adopted education and exercise program are not associated with spontaneous improvements in physical inactivity despite changes in self-reported pain and function. Interventions specifically targeting physical inactivity are needed. Registration number: www.clinicaltrials.gov: NCT03125954.

Trajectories of perceived exertion and pain over a 12-week neuromuscular exercise program in patients with knee osteoarthritis

BACKGROUND

Exercise programs rely on the overload principle, yet patients with knee osteoarthritis (OA) may not adequately progress exercises due to fear of exacerbating symptoms.

OBJECTIVE

To describe trajectories for perceived exertion and exercise-induced knee pain during a neuromuscular exercise program for patients with knee OA.

DESIGN

Participants with knee OA completed a 12-week neuromuscular exercise program consisting of weekly supervised sessions plus home exercises. During each supervised session, the Borg's rating of perceived exertion (RPE; 6 = no exertion, 20 = maximal exertion) and knee pain (pre, post, max) using Numeric Rating Scales (NRS; 0 = no pain, 10 = worst imaginable pain) were completed. Mean changes in RPE and pain from weeks 1-12 were calculated. Mixed effects regression was used to investigate trajectories over time (weeks) for RPE, and maximum pain (pre-to-max) and pain-change (pre-to-post) during exercise.

RESULTS

56 patients (95%) completed the program. From week 1-12, RPE increased by 2.6 (95%CI, 1.7 to 3.5), from 'somewhat hard' to 'very hard', while max pain decreased by 1.0 NRS (95%CI, 0.5 to 1.3) and pain-change decreased by 0.9 NRS (95%CI, 0.4 to 1.3). Linear mixed effects regression showed a quadratic increase for RPE over time until between weeks 9 and 10, then RPE plateaued. Maximum pain decreased linearly over time. Pain-change showed a quadratic decrease over time until approximately week 9, then pain-change plateaued.

CONCLUSIONS

In patients with knee OA participating in a 12-week neuromuscular exercise program, perceived exertion during exercise progressed from 'somewhat hard' to 'very hard' at 9 weeks, while exercise-induced knee pain decreased. Patients were able to work harder while experiencing decreases rather than increases in pain.

Patients use fewer analgesics following supervised exercise therapy and patient education: an observational study of 16 499 patients with knee or hip osteoarthritis

OBJECTIVES

To investigate changes in analgesic use before and after supervised exercise therapy and patient education in patients with knee or hip osteoarthritis (OA).

METHODS

We recruited 16 499 of 25 933 eligible patients (64%; mean age 64.9; SD 9.6; 73% women) from the Good Life with osteoArthritis in Denmark (GLA:D) registry. Change in proportions of analgesic users (categorised according to analgesic risk profile; opioids > non-steroidal anti-inflammatory drugs > paracetamol) was assessed from before to after an 8-week supervised exercise therapy and patient education programme targeting knee or hip OA pain and functional limitations.

RESULTS

Patients reported 13.2 mm (95% CI 12.8 to 13.6) less pain (visual analogue scale 0-100 mm) at follow-up compared with baseline. The proportion of analgesic users reduced from 62.2% (95% CI 61.5 to 63.0) at baseline to 44.1% (95% CI 43.3 to 44.9) at follow-up (absolute change: 18.1% (95% CI 17.3 to 19.0)). Among patients using analgesics at baseline, 52% changed to a lower risk analgesic or discontinued analgesic use. The proportion of opioid users after the exercise therapy was 2.5% (95% CI 2.1 to 2.9) lower than baseline; this represents a relative reduction of 36%.

CONCLUSION

Among patients with knee or hip OA using analgesics, more than half either discontinued analgesic use or shifted to lower risk analgesics following an 8-week structured exercise therapy and patient education programme (GLA:D). These data encourage randomised controlled trial evaluation of whether supervised exercise therapy, combined with patient education, can reduce analgesic use, including opioids, among patients with knee and hip OA pain.

Moderate exercise ameliorates osteoarthritis by reducing lipopolysaccharides from gut microbiota in mice

Lipopolysaccharides (LPSs) released by gut microbiota are correlated with the pathophysiology of osteoarthritis (OA). Exercise remodels the composition of gut microbiota. The present study investigated the hypothesis that wheel-running exercise prevents knee OA induced by high-fat diet (HFD) via reducing LPS from intestinal microorganisms. Male C57BL/6 J mice were treated with sedentary or wheel-running exercise, standard diet (13.5% kcal) or HFD (60% kcal), berberine or not according to their grouping. Knee OA severity, blood and synovial fluid LPS, cecal microbiota, and TLR4 and MMP-13 expression levels were determined. Our findings reveal that HFD treatment decreased gut microbial diversity. Increase in endotoxin-producing bacteria, decrease in gut barrier-protecting bacteria, high LPS levels in the blood and synovial fluid, high TLR4 and MMP-13 expression levels, and severe cartilage degeneration were observed. By contrast, voluntary wheel running caused high gut microbial diversity. The gut microbiota were reshaped, LPS levels in the blood and synovial fluid and TLR4 and MMP-13 expression levels were low, and cartilage degeneration was ameliorated. Berberine treatment reduced LPS levels in the samples, but decreased the diversity of intestinal flora with similar changes to that caused by HFD. In conclusion, unlike taking drugs, exercising can remodel gut microbial ecosystems, reduce the circulating levels of LPS, and thereby contribute to the relief of chronic inflammation and OA. Our findings showed that moderate exercise is a potential therapeutic approach for preventing and treating obesity-related OA.

Factors Associated With the Outcome of a First-Line Intervention for Patients With Hip or Knee Osteoarthritis or Both: Data From the BOA Register

OBJECTIVE

This study explored the association of patients' demographics, health status, symptom severity, previous osteoarthritis (OA) care, and psychological status with the change in pain severity following a first-line intervention including education and exercise for OA provided nationwide in Swedish primary care.

METHODS

This register-based cohort study included 23,309 people with knee or hip OA from the Better Management of Patients with OA register. Linear regression models were used to assess the association of independent variables with the change in pain from baseline to 3 and 12 months. All the analyses were stratified based on the affected joint (hip vs knee).

RESULTS

In people with hip and people with knee OA, high levels of baseline pain were associated with decreased pain at both follow-ups (3 months: knee B = -.67; hip B = -.64; 12 months: knee B = -.70; hip B = -.66), whereas being older, overweight, or female had a weak or no association. Finally, at both follow-ups, bilateral OA was associated with increased pain only in people with knee OA, whereas comorbidities and the willingness to undergo surgery were associated with increased pain regardless of the affected joint.

CONCLUSIONS

Baseline pain showed the strongest association among the analyzed variables, whereas sex, age, and body mass index appear to be weakly associated with the pain change after a first-line intervention. Comorbidities and willingness to undergo surgery showed a potentially important association and may have a negative impact on the pain change following a first-line intervention.

IMPACT

In people with hip or knee OA, age, sex, body mass index, and previous surgery are only weakly associated with the change in pain after a first-line intervention supporting the evidence recommending exercise and education as a foundation for all OA therapy. Having comorbidities and being willing to undergo surgery is associated with a worse outcome from a first-line intervention, including exercise and education. Individualized treatments addressing the disease perception and the specific comorbidity profile may improve the outcomes.

Effect of changing water depth on muscle activity and motion kinematics during sit-to-stand motion

BACKGROUND

Sit-to-stand (STS) movement is a fundamental activity in daily life. Studies have examined the effect of water depth during aquatic exercise; however, no investigation has examined the effect of water depth on STS movements.

RESEARCH QUESTION

This study examined whether changing water depth affected muscle activity and motion kinematics during the STS movement.

METHODS

Eleven participants performed the STS movement on the ground (land) and at different water depths (1.0-m [deep] and 0.6-m [shallow]) at a self-determined pace. Lower extremity and trunk muscle activity, lower extremity joint angle, and trunk segment inclination angle were measured. Mean muscle activity during STS movement, initial and final postures, and range of motion of each angle was evaluated. Correlations of a normalised time-series pattern of electromyography and motion kinematics measures between land and shallow (land-shallow) and between land and deep (land-deep) were investigated.

RESULTS

The rectus femoris was more active in shallow than in deep water STS movement but less than that in land STS. Other muscles showed no significant differences between shallow and land STS movement. Correlation of the time series pattern in the tibialis anterior, rectus femoris, and erector spinae muscles was higher in the land-shallow than the land-deep STS. The trunk showed more forward inclination in the shallow STS than the land but less than the deep. Correlation of the time series pattern in the hip joint and trunk inclination angles was higher in the land-shallow STS than in the land-deep STS.

SIGNIFICANCE

STS exercise in the shallow water depth reduced muscle load for the knee extensor but not for other muscles. The muscle activity pattern showed a higher correlation between the land STS and shallow water than deep. Sitting posture becomes upright when the water depth decreases, but a similar motion pattern could be attained regardless of water depth.

Low-dose strength training in addition to neuromuscular exercise and education in patients with knee osteoarthritis in secondary care - a randomized controlled trial

OBJECTIVES

To investigate the effects of lower limb strength training in addition to neuromuscular exercise and education (ST + NEMEX-EDU) compared to neuromuscular exercise and education alone (NEMEX-EDU) on self-reported physical function in patients with knee osteoarthritis (KOA).

DESIGN

Patient-blinded, parallel-group randomized controlled trial (RCT).

METHODS

The trial included 90 patients in secondary care with radiographic and symptomatic KOA, ineligible for knee replacement. Both groups exercised twice weekly for 12 weeks. Additional strength training consisted of a single, fatiguing knee extension set (30-60RM) before four sets of leg-press (8-12RM). Primary outcome was the between-group difference on the subscale activities of daily living from the Knee Injury and Osteoarthritis Outcome Score (KOOS_ADL) at 12 weeks. Secondary outcomes included KOOS symptoms, pain, function in sport and recreation, and quality of life, 40 m walk, stair climb, leg extension power, EuroQol-5D-5L, pain medication usage, and adverse events.

RESULTS

There was no statistically significant between-group difference in KOOS_ADL at 12-weeks; adjusted mean difference -1.15 (-6.78 to 4.48). Except for the stair climb test, which demonstrated an adjusted mean difference of 1.15 (0.09-2.21) in favor of ST + NEMEX-EDU, all other outcomes showed no statistically significant between-group differences. Neither group improved leg extension power.

CONCLUSION

The addition of lower-limb strength training, using a low-dose approach, to neuromuscular exercise and education carried no additional benefits on self-reported physical function or on most secondary outcomes. Both groups displayed similar improvements at 12-week follow-up. Hence, the current low-dose strength training approach provided no additional clinical value in this group of KOA patients. Trial identifier (ClinicalTrials.gov): NCT03215602.

The Role of Physical Activity as Conservative Treatment for Hip and Knee Osteoarthritis in Older People: A Systematic Review and Meta-Analysis

The aim of this systematic review and meta-analysis is to determine the role of physical activity as a conservative treatment for older people with knee or hip osteoarthritis. The effect on pain, physical function, stiffness, quality of life, and dynamic balance of Aquatic Exercise, Land-based Exercise, and Sports were compared in a specific population composed of osteoarthritic patients aged 65 or over. A systematic search using Pubmed-Medline, Google Scholar, and the Cochrane Library was carried out to select randomized clinical trials, observational studies, or case series that evaluated outcome measures after physical activity. Twenty randomized controlled trials (RCTs) and two case series were included in this review. Four trials were at low risk of bias (A), 12 at unclear risk of bias (B), and four at high risk of bias (C). Compared to controls, Aquatic Exercise, Land-based Exercise, Tai Chi, and Yoga showed a small to high effect for improving pain, physical function, quality of life, and stiffness. Active exercise and sport are effective to improve pain and physical function in elderly people with osteoarthritis. Nevertheless, further studies are required to validate the use of land-based exercise, aquatic exercise, or sport to treat the symptoms of older adults that suffer from knee and hip osteoarthritis.

Long-term effects of group exercise intervention on maximal step-up height in middle-aged female primary care patients with obesity and other cardio-metabolic risk factors

Background

Low physical performance is a predictor of morbidity and mortality. This study looks at long-term effects of an exercise intervention on maximal step-up height (MSH) in individuals with low physical function. Factors associated with changes in MSH was studied.

Methods

Female patients (n = 101), mean (SD) age of 52 (11) years, were recruited for a 3-month group exercise intervention including 2–3 sessions/week of mixed aerobic fitness and strength training. MSH, weight, body mass index (BMI), waist circumference, maximal oxygen consumption (VO₂-max), self-reported health (SF-36) and physical activity (PA) were measured at baseline (T0), after 3 months (T1) and after 14–30 (mean 22) months (T2). Relationships between changes in MSH (cm) and age, baseline MSH, time to follow-up, changes in anthropometric measurements, VO₂-max, SF-36 and PA were studied with regression analyses.

Results

MSH, significantly, increased from T0 to T1, 27.2 (5.7) to 29.0 (5.5) cm and decreased to 25.2 (5.5) cm at T2. Time to follow-up (B = − 0.42, p < 0.001) and change in BMI (B = − 0.29, p = 0.012) correlated significantly to changes in MSH. Waist circumference, VO₂-max, PF and exercise/physical activity levels were significantly improved at T2, while BMI did not change. In a univariate logistic regression model, maintenance of MSH correlated to the extent of mixed training (OR 3.33, 95% CI 1.25–8.89). In a multivariate logistic regression model adjusted for important factors the correlation was not significant. However, MSH was significantly higher in individuals participating in 2–3 session per week compared to one session.

Conclusions

A 3-month group exercise intervention increased MSH, improved fitness, decreased risk in female patients with elevated cardio-metabolic risk. After an average of 22 months MSH was reduced while positive effects remained for waist circumference, VO₂-max, physical function and physical activity. However, regular group exercise 2–3 times per week with mixed aerobic fitness and strength training was associated with maintenance of MSH in a subgroup of patients. We suggest that such an intervention including regular support from healthcare professionals is a successful approach for maintaining improved leg-muscle strength among primary care patients.

Trial registration

ISRCTN21220201 September 18, 2019, retrospectively registered.