Very brief intervention for physical activity behaviour change in cardiac rehabilitation: protocol for the 'Measure It!' effectiveness-implementation hybrid trial.

INTRODUCTION: Physical inactivity is a risk factor for repeat cardiac events and all-cause mortality in coronary heart disease (CHD). Cardiac rehabilitation, a secondary prevention programme, aims to increase physical activity levels in this population from a reported low baseline. This trial will investigate the effectiveness and implementation of a very brief physical activity intervention, comparing different frequencies of physical activity measurement by cardiac rehabilitation clinicians. The Measure It! intervention (<5 min) includes a self-report and objective measure of physical activity (steps) plus very brief physical activity advice. METHODS AND ANALYSIS: This type 1 hybrid effectiveness-implementation study will use a two-arm multicentre assessor-blind randomised trial design. Insufficiently active (<150 min of moderate-to-vigorous physical activity per week) cardiac rehabilitation attendees with CHD (18+ years) will be recruited from five phase II cardiac rehabilitation centres (n=190). Patients will be randomised (1:1) to five physical activity measurements or two physical activity measurements in total over 24 weeks. The primary effectiveness outcome is accelerometer daily minutes of moderate-to-vigorous intensity physical activity at 24 weeks. Secondary effectiveness outcomes include body mass index, waist circumference and quality-of-life. An understanding of multilevel contextual factors that influence implementation, and antecedent outcomes to implementation of the intervention (eg, feasibility and acceptability), will be obtained using semistructured interviews and other data sources. Linear mixed-effects models will be used to analyse effectiveness outcomes. Qualitative data will be thematically analysed inductively and deductively using framework analysis, with the framework guided by the Consolidated Framework for Implementation Research and Theoretical Domains Framework. ETHICS AND DISSEMINATION: The study has ethical approval (University of Canberra (ID 11836), Calvary Bruce Public Hospital (ID 14-2022) and the Greater Western Area (ID 2022/ETH01381) Human Research Ethics Committees). Results will be disseminated in multiple formats for consumer, public and clinical audiences. TRIAL REGISTRATION NUMBER: ACTRN12622001187730p.

"We don't want to run before we walk": the attitudes of Australian stakeholders towards using psychedelics for mental health conditions.

OBJECTIVES: This study was aimed at understanding the attitudes and positions of key Australian organisational and political stakeholders towards using psychedelic agents in medically supervised environments to treat mental health conditions. Specifically, this research was designed to identify some of the issues that might impede the clinical implementation of psychedelics. METHODS: Semi-structured interviews were conducted with four Australian politicians and nine representatives of key stakeholder organisations between September 2022 and January 2023. Data analyses were completed using pattern-based inductive thematic analysis. RESULTS: Participants were cautiously optimistic about using psychedelics to treat mental health conditions, with hesitancy emerging due to the perceived inadequacy of research into the efficacy and feasibility of these treatments. Politicians consistently mentioned that negative stigma prevented them and their peers from supporting the use of psychedelics in Australia. Effective, evidence-based, clear messaging that refutes misconceptions, uses persuasive messaging and provides clear information to inform implementation is needed to improve knowledge and challenge attitudes, biases and emotions that can influence the debate around psychedelics. CONCLUSIONS: Stakeholder representatives and politicians agree that insufficient evidence exists to support the widespread clinical implementation of psychedelics in Australia. Politicians also perceive the stigma associated with psychedelics might negatively influence progressive legislation. Additional research and a clear presentation of this research are needed before the clinical use of psychedelics can be supported.

Perspectives of telehealth access and implementation in people recovering from serious transport injury, health care providers and compensation system staff during the COVID-19 pandemic in Australia.

INTRODUCTION: Before the COVID-19 pandemic, few injury compensation schemes supported access to service-delivery via telehealth. The aim of this qualitative study was to explore the perspectives of people recovering from serious transport injury, health care providers, and senior staff of a transport injury compensation scheme, in relation to the uptake and implementation of telehealth during the COVID-19 pandemic, and its ongoing use. METHODS: Semi-structured interviews were undertaken with 35 participants, including 15 seriously injured patients, 16 health care providers and 4 compensation scheme staff. A thematic analysis was performed using a framework approach. RESULTS: Themes identified included the need to provide continuity of care via telehealth during the pandemic for patients recovering from injury, and the associated organisational and technical support needs. It was noted that some types of services worked well via telehealth, including psychology, while others did not, including physical assessments. The convenience of telehealth was highlighted, in relation to reduced travel. However, there were often safety fears relating to falls, and communication issues with injured people. CONCLUSIONS: This research found that the majority of injured patients and health care providers had benefitted from the introduction of service delivery via telehealth during the pandemic for some types of services. Participants saw opportunities for continued benefit post-pandemic, particularly for improving equity of access to health care for people with barriers to mobility and travel.

How effective are interventions in optimizing workplace mental health and well-being? A scoping review of reviews and evidence map.

OBJECTIVES: Mental well-being is critical to quality of life. Workplace mental well-being is crucial to ensure employee health, satisfaction, and performance. Mental ill-health is a global challenge, costing workplaces $17 billion per year. Workplaces have realized the need for investment in interventions to promote mental health and well-being in their workforce. However, given their limited resources, workplace personnel responsible for program implementation need evidence-based guidance on which interventions influence which outcomes. METHODS: This study employed a scoping review methodology in order to produce an evidence map and includes reviews of workplace mental well-being interventions. The search strategy focused on peer-reviewed articles with the primary aim of investigating workplace mental health interventions. Reviews were assessed for quality using AMSTAR 2. The evidence map includes interventions (rows) and outcomes (columns), with the relative size of the reviews underpinning each intersection represented by circles and the direction of evidence represented by color. RESULTS: Eighty reviews were deemed eligible from 4795 citations. The resulting evidence map includes 17 intervention types designed to influence 12 outcomes. Interventions with the highest quality evidence were mindfulness, education and information provision, and individual psychological therapies. The most common outcomes were burnout / stress reduction and mental well-being. Interventions tended to focus on individual level factors rather than organizational or system-level factors. CONCLUSION: The evidence-base for workplace mental health interventions is broad and extensive. There is an apparent knowledge-to-practice gap, presenting challenges to implementing workplace mental health programs (ie, what interventions have the highest quality evidence). This study aims to fill the gap by providing an interactive evidence-map. Future research should look to fill the gaps within the map including the lack of organization and system level factors and especially economic evaluations.

P2/N95 respirators & surgical masks to prevent SARS-CoV-2 infection: Effectiveness & adverse effects.

BACKGROUND: Millions of people have acquired and died from SARS-CoV-2 infection during the COVID-19 pandemic. Healthcare workers (HCWs) are required to wear personal protective equipment (PPE), including surgical masks and P2/N95 respirators, to prevent infection while treating patients. However, the comparative effectiveness of respirators and masks in preventing SARS-CoV-2 infection and the likelihood of experiencing adverse events (AEs) with wear are unclear. METHODS: Searches were carried out in PubMed, Europe PMC and the Cochrane COVID-19 Study Register to 14 June 2021. A systematic review of comparative epidemiological studies examining SARS-CoV-2 infection or AE incidence in HCWs wearing P2/N95 (or equivalent) respirators and surgical masks was performed. Article screening, risk of bias assessment and data extraction were duplicated. Meta-analysis of extracted data was carried out in RevMan. RESULTS: Twenty-one studies were included, with most having high risk of bias. There was no statistically significant difference in respirator or surgical mask effectiveness in preventing SARS-CoV-2 infection (OR 0.85, [95%CI 0.72, 1.01]). Healthcare workers experienced significantly more headaches (OR 2.62, [95%CI 1.18, 5.81]), respiratory distress (OR 4.21, [95%CI 1.46, 12.13]), facial irritation (OR 1.80, [95%CI 1.03, 3.14]) and pressure-related injuries (OR 4.39, [95%CI 2.37, 8.15]) when wearing respirators compared to surgical masks. CONCLUSION: The existing epidemiological evidence does not enable definitive assessment of the effectiveness of respirators compared to surgical masks in preventing infection. Healthcare workers wearing respirators may be more likely to experience AEs. Effective mitigation strategies are important to ensure the uptake and correct use of respirators by HCWs.

Nursing perspectives on reducing sedentary behaviour in sub-acute hospital settings: A mixed methods study.

AIM AND OBJECTIVES: To determine the factors influencing nurses' decisions and capacity to reduce sedentary behaviour in hospital inpatients in sub-acute hospital settings. BACKGROUND: Sedentary behaviour in hospital inpatients is a complex issue that can be resistant to resolution. There is little research investigating factors influencing nurses' promotion of reduced levels of sedentary behaviour in sub-acute hospital settings. DESIGN: An explanatory sequential design was employed, comprising quantitative and qualitative phases. METHODS: An online survey was conducted with a convenience sample of 138 nurses from five Australian states. Logistic regression modelling identified demographic and behavioural characteristics of nurses who often encouraged patients to reduce their sedentary behaviour. In-depth interviews were conducted with 11 ward nurses and nurse managers, with the content subjected to thematic analysis. STROBE and GRAMMS checklists were employed. RESULTS: Nurses recognised their role in promoting reduced sedentary behaviour but faced a range of personal and organisational barriers in achieving this outcome for patients. Few nurses were aware of national physical activity and sedentary behaviour guidelines. Five themes emerged from interviews (nursing role, care challenges, expectations of advocates, teamwork and improving the experience). Overall, many nurses experienced a lack of agency in promoting reduced sedentary behaviour and cognitive dissonance in feeling unable to undertake this role. CONCLUSIONS: The results of this study are significant in confirming that reducing sedentary behaviour in hospital inpatients is influenced by a range of complex and multi-level factors. There is a fundamental need for organisational and clinical leadership in building a culture and climate in which staff feel empowered to promote reduced sedentary behaviour in their patients. RELEVANCE TO CLINICAL PRACTICE: The results of this study highlight the importance of taking action to reduce sedentary behaviour in sub-acute hospital settings. A co-design approach to developing interventions in local health services is warranted.

Communicating COVID-19 health information to culturally and linguistically diverse communities: insights from a participatory research collaboration.

OBJECTIVE: To consider the challenges of communicating COVID-19 directives to culturally and linguistically diverse (CALD) communities in Australia, and present evidence-based solutions to influence policy and practice on promoting relevant health behaviours; to advance participatory research methodologies for health behaviour change. Type of program or service: We present a case study of a participatory research collaboration between CALD community leaders and health behaviour change scientists during the COVID-19 crisis. The goal was to better understand the role of community leaders in shaping health behaviours in their communities and how that role might be leveraged for better health outcomes. METHODS: This article is the culmination of a series of dialogues between CALD community and advocacy leaders, and health behaviour change scientists in July 2020. The academic authors recruited 12 prominent CALD community leaders, conducted five semi-structured dialogues with small groups, and worked with all participants to develop insights that were applicable to the many different CALD communities represented in the research collaboration. RESULTS: Three key findings emerged: 1) partnerships between CALD leaders, communities and government are critical for effective health communication; 2) shifting behaviour requires moving beyond disseminating information to designing tailored solutions; and 3) the diverse needs and circumstances of people and communities must be at the centre of health communication and behaviour change strategies. LESSONS LEARNT: The collaborative process we undertook in this study enabled us to identify key challenges experienced and solutions offered by CALD leaders in communicating health information throughout the COVID-19 pandemic. Partnering with communities that are subject to health messaging can reduce inequalities in healthcare communication by enabling the development of strategies that help align human behaviour with the recommendations of health experts. This - along with sustained partnership and collaboration with CALD communities, understanding the cultural context, and the appropriate tailoring and delivery of communications - will ensure health-related messages are not lost in translation. The lessons provided in this paper are applicable not only to the current pandemic but also to post-pandemic social and economic recovery.

Guiding Glucose Management Discussions Among Adults With Type 2 Diabetes in General Practice: Development and Pretesting of a Clinical Decision Support Tool Prototype Embedded in an Electronic Medical Record.

BACKGROUND: Managing type 2 diabetes (T2D) requires progressive lifestyle changes and, sometimes, pharmacological treatment intensification. General practitioners (GPs) are integral to this process but can find pharmacological treatment intensification challenging because of the complexity of continually emerging treatment options. OBJECTIVE: This study aimed to use a co-design method to develop and pretest a clinical decision support (CDS) tool prototype (GlycASSIST) embedded within an electronic medical record, which uses evidence-based guidelines to provide GPs and people with T2D with recommendations for setting glycated hemoglobin (HbA1c) targets and intensifying treatment together in real time in consultations. METHODS: The literature on T2D-related CDS tools informed the initial GlycASSIST design. A two-part co-design method was then used. Initial feedback was sought via interviews and focus groups with clinicians (4 GPs, 5 endocrinologists, and 3 diabetes educators) and 6 people with T2D. Following refinements, 8 GPs participated in mock consultations in which they had access to GlycASSIST. Six people with T2D viewed a similar mock consultation. Participants provided feedback on the functionality of GlycASSIST and its role in supporting shared decision making (SDM) and treatment intensification. RESULTS: Clinicians and people with T2D believed that GlycASSIST could support SDM (although this was not always observed in the mock consultations) and individualized treatment intensification. They recommended that GlycASSIST includes less information while maintaining relevance and credibility and using graphs and colors to enhance visual appeal. Maintaining clinical autonomy was important to GPs, as they wanted the capacity to override GlycASSIST's recommendations when appropriate. Clinicians requested easier screen navigation and greater prescribing guidance and capabilities. CONCLUSIONS: GlycASSIST was perceived to achieve its purpose of facilitating treatment intensification and was acceptable to people with T2D and GPs. The GlycASSIST prototype is being refined based on these findings to prepare for quantitative evaluation.

Australian adults expect physiotherapists to provide physical activity advice: a survey.

QUESTIONS: Do Australian adults think that physiotherapists are likely to provide physical activity (PA) advice, general health advice, and physical interventions? Do Australian adults think it is important for physiotherapists to provide each of these services? What factors are associated with adults' expectations of receiving these services from physiotherapists? DESIGN: Online nationwide cross-sectional survey. PARTICIPANTS: Australian adults aged < 18 years who have or have not had a physiotherapy appointment before. OUTCOME MEASURES: The survey instrument included questions asking respondents if it was both important and likely that a physiotherapist would provide services pertaining to PA and general health-related advice as well as physical interventions. Responses were measured on a 6-point Likert scale. RESULTS: Full responses were obtained from 587 respondents. Most respondents reported that it is likely (40%) or extremely likely (29%) and important (47%) or extremely important (29%) that a physiotherapist provides advice to help them increase their PA levels. This was similar to the percentage of respondents reporting that it is likely (46%) or extremely likely (19%) and important (43%) or extremely important (24%) that a physiotherapist provides advice to help them improve their general health. A similar number of respondents also reported that it is likely (37%) or extremely likely (29%) and important (42%) or extremely important (26%) that a physiotherapist provides massage. The odds of respondents expecting physiotherapists to provide PA advice were higher for those who were older (OR 1.2, 95% CI 1.1 to 1.5), chose to see a physiotherapist to feel better and receive a home exercise program (OR 2.0, 95% CI 1.0 to 3.9), and felt that physiotherapists met their expectations (OR 4.5, 95% CI 2.2 to 9.3). CONCLUSION: Australian adults believe it is likely and important that physiotherapists provide PA and general health advice in addition to specific physical interventions.

Changing prescribing behaviours with educational outreach: an overview of evidence and practice.

BACKGROUND: General practitioners (GPs), or family practitioners, are tasked with prescribing medications that can be harmful to the community if they are inappropriately prescribed or used (e.g. opioids). Educational programs, such as educational outreach (EO), are designed to change the behaviour of health professionals. The purpose of this study was to identify the efficacy of EO programs at changing the prescribing behaviour of GPs. METHODS: This study included an evidence and practice review, comprising a rapid review supplemented by interviews with people who are familiar with EO implementation for regulation purposes. Seven databases were searched using terms related to health professionals and prescribing. Systematic and narrative reviews published in English after 2007 were included. Non-statistical analysis was used to report intervention efficacy. Three government representatives participated in semi-structured interviews to aid in understanding the relevance of review findings to the Victorian context. Interviews were transcribed verbatim and thematically analysed for emerging themes. RESULTS: Fourteen reviews were identified for the evidence review. Isolated (e.g. EO program delivered by itself) and multifaceted (e.g. EO program supplemented by other interventions) programs were found to change prescribing behaviours. However, limited evidence suggests that EO can successfully change prescribing behaviours specific to GPs. Isolated EO can successfully change health professional prescribing behaviours, although cheaper alternatives such as letters might be just as effective. Multifaceted EO can also successfully change health professional prescribing behaviours, especially in older adults, but it remains unclear as to what combination of interventions works best. Success factors for EO reported by government representatives included programs having practical rather than didactic foci; making EO compulsory; focussing EO on preventing adverse events; using monetary or professional development incentives; and in-person delivery. CONCLUSIONS: Educational outreach can successfully change prescribing behaviours but evidence specific to GPs is lacking. Key characteristics of EO that could optimise success include ensuring the EO program is tailored, involves practical learning and uses incentives that are meaningful to clinicians.

The self-reported factors that influence Australian physiotherapists' choice to promote non-treatment physical activity to patients with musculoskeletal conditions.

OBJECTIVES: To determine the factors that influence physiotherapists' choice to promote non-treatment physical activity to patients with musculoskeletal conditions. DESIGN: Cross sectional survey. METHODS: A national, online self report survey was targeted at Australian registered physiotherapists primarily treating patients with musculoskeletal conditions in private practice and outpatient settings. Likert scale questions were used to measure the factors influencing non-treatment physical activity promotion by physiotherapists. RESULTS: Two hundred and sixteen full responses were received. Most (56.6%) respondents irregularly promoted non-treatment physical activity, whereas 43.4% always promoted non-treatment physical activity. Promotion of non-treatment physical activity was bivariately associated with respondents' own physical activity level (x2[2]=7.670, p=0.022) and exercise science education (x2[1]=4.613, p=0.032). Multivariable analysis identified that Knowledge (knowing how to promote non-treatment physical activity) (OR=1.60, 95%CI 1.026-2.502), Goals (other patient problems are more important) (OR=0.62, 95%CI 0.424-0.897) and Innovation (compatibility of non-treatment physical activity promotion with the clinical environment) (OR=1.75, 95%CI 1.027-2.985) were significantly and independently associated with non-treatment physical activity promotion. CONCLUSIONS: The majority of surveyed Australian physiotherapists irregularly promoted non-treatment physical activity. Lack of knowledge of how to promote non-treatment physical activity, prioritising other patient problems before non-treatment physical activity promotion and using promotion methods that are not compatible with current practice might reduce non-treatment physical activity promotion frequency by physiotherapists.

The behaviour change techniques used by Australian physiotherapists to promote non-treatment physical activity to patients with musculoskeletal conditions.

OBJECTIVES: To determine: (i) the behaviour change techniques used by a sample of Australian physiotherapists to promote non-treatment physical activity; and (ii) whether those behaviour change techniques are different to the techniques used to encourage adherence to rehabilitation exercises. DESIGN: Cross-sectional survey. METHOD: An online self-report survey was advertised to private practice and outpatient physiotherapists treating patients with musculoskeletal conditions. The use of 50 behaviour change techniques were measured using five-point Likert-type scale questions. RESULTS: Four-hundred and eighty-six physiotherapists responded to the survey, with 216 surveys fully completed. Most respondents (85.1%) promoted non-treatment physical activity often or all of the time. Respondents frequently used 29 behaviour change techniques to promote non-treatment physical activity or encourage adherence to rehabilitation exercises. A similar number of behaviour change techniques was frequently used to encourage adherence to rehabilitation exercises (n=28) and promote non-treatment physical activity (n=26). Half of the behaviour change techniques included in the survey were frequently used for both promoting non-treatment physical activity and encouraging adherence to rehabilitation exercises (n=25). Graded tasks was the most, and punishment was the least, frequently reported technique used to promote non-treatment physical activity and encourage adherence to rehabilitation exercises. CONCLUSIONS: Respondents reported using similar behaviour change techniques to promote non-treatment physical activity and encourage adherence to rehabilitation exercises. The variability in behaviour change technique use suggests the behaviour the physiotherapist is promoting influences their behaviour change technique choice. Including the frequently-used behaviour change techniques in non-treatment physical activity promotion interventions might improve their efficacy.

Physiotherapist-Led Physical Activity Interventions Are Efficacious at Increasing Physical Activity Levels: A Systematic Review and Meta-analysis.

OBJECTIVE: Physical activity (PA) interventions to address noncommunicable disease (NCD) risk are commonly delivered in private practice and outpatient physiotherapy settings. This study reviewed the efficacy of physiotherapist-led physical activity (PLPA) interventions at improving PA levels. DATA SOURCES: Twelve databases were searched using terms related to both physiotherapy and PA. English-language studies of all designs in adults were included. Meta-analyses were conducted separately for interventions measuring the following: (1) participants meeting recommended PA levels; (2) total PA at short- and long-term follow-up; and (3) total PA achieved after short and long PLPA interventions. Pooled effects were calculated using a fixed-effects model as standardized mean differences (SMDs). Nonstatistical analysis was used to identify the effect of PLPA interventions on the volume of PA performed at different intensities. MAIN RESULTS: From an initial 4140 studies, 8 were retained, and risk of bias ranged from low to high. Meta-analysis showed the odds of adults meeting minimum recommended PA levels were doubled in groups provided a PLPA intervention [OR = 2.15, 95% confidence interval (CI) = 1.35-3.43]. Total PA levels were increased in the short term (SMD = 0.15, 95% CI = 0.03-0.27) but not in the long term. Longer term interventions did not improve outcomes. Nonstatistical analysis identified that PLPA interventions were efficacious at increasing the amount of PA adults performed at all intensities. CONCLUSIONS: Clinic-based PLPA interventions delivered in private practice, primary care, and outpatient settings were efficacious at increasing PA in adults at risk of NCDs. Improvements did not last long term and were not enhanced with longer interventions.

Physiotherapists use a small number of behaviour change techniques when promoting physical activity: A systematic review comparing experimental and observational studies.

OBJECTIVES: Physiotherapists promote physical activity as part of their practice. This study reviewed the behaviour change techniques physiotherapists use when promoting physical activity in experimental and observational studies. DESIGN: Systematic review of experimental and observational studies. METHODS: Twelve databases were searched using terms related to physiotherapy and physical activity. We included experimental studies evaluating the efficacy of physiotherapist-led physical activity interventions delivered to adults in clinic-based private practice and outpatient settings to individuals with, or at risk of, non-communicable diseases. Observational studies reporting the techniques physiotherapists use when promoting physical activity were also included. The behaviour change techniques used in all studies were identified using the Behaviour Change Technique Taxonomy. The behaviour change techniques appearing in efficacious and inefficacious experimental interventions were compared using a narrative approach. RESULTS: Twelve studies (nine experimental and three observational) were retained from the initial search yield of 4141. Risk of bias ranged from low to high. Physiotherapists used seven behaviour change techniques in the observational studies, compared to 30 behaviour change techniques in the experimental studies. Social support (unspecified) was the most frequently identified behaviour change technique across both settings. Efficacious experimental interventions used more behaviour change techniques (n=29) and functioned in more ways (n=6) than did inefficacious experimental interventions (behaviour change techniques=10 and functions=1). CONCLUSIONS: Physiotherapists use a small number of behaviour change techniques. Less behaviour change techniques were identified in observational studies compared to experimental studies, suggesting physiotherapists use less BCTs clinically than experimentally.

Subsequent Injuries Are More Common Than Injury Recurrences: An Analysis of 1 Season of Prospectively Collected Injuries in Professional Australian Football.

BACKGROUND: It is known that some people can, and do, sustain >1 injury over a playing season. However, there is currently little high-quality epidemiological evidence about the risk of, and relationships between, multiple and subsequent injuries. PURPOSE: To describe the subsequent injuries sustained by Australian Football League (AFL) players over 1 season, including their most common injury diagnoses. STUDY DESIGN: Cohort study; Level of evidence, 3. METHODS: Within-player linked injury data on all date-ordered match-loss injuries sustained by AFL players during 1 full season were obtained. The total number of injuries per player was determined, and in those with >1 injury, the Subsequent Injury Classification (SIC) model was used to code all subsequent injuries based on their Orchard Sports Injury Classification System (OSICS) codes and the dates of injury. RESULTS: There were 860 newly recorded injuries in 543 players; 247 players (45.5%) sustained ≥1 subsequent injuries after an earlier injury, with 317 subsequent injuries (36.9% of all injuries) recorded overall. A subsequent injury generally occurred to a different body region and was therefore superficially unrelated to an index injury. However, 32.2% of all subsequent injuries were related to a previous injury in the same season. Hamstring injuries were the most common subsequent injury. The mean time between injuries decreased with an increasing number of subsequent injuries. CONCLUSION: When relationships between injuries are taken into account, there is a high level of subsequent (and multiple) injuries leading to missed games in an elite athlete group.

Quadratus femoris: An EMG investigation during walking and running.

Dysfunction of hip stabilizing muscles such as quadratus femoris (QF) is identified as a potential source of lower extremity injury during functional tasks like running. Despite these assumptions, there are currently no electromyography (EMG) data that establish the burst activity profile of QF during any functional task like walking or running. The objectives of this study were to characterize and compare the EMG activity profile of QF while walking and running (primary aim) and describe the direction specific action of QF (secondary aim). A bipolar fine-wire intramuscular electrode was inserted via ultrasound guidance into the QF of 10 healthy participants (4 females). Ensemble curves were generated from four walking and running trials, and normalized to maximum voluntary isometric contractions (MVICs). Paired t-tests compared the temporal and amplitude EMG variables. The relative activity of QF in the MVICs was calculated. The QF displayed moderate to high amplitude activity in the stance phase of walking and very high activity during stance in running. During swing, there was minimal QF activity recorded during walking and high amplitudes were present while running (run vs walk effect size=4.23, P<0.001). For the MVICs, external rotation and clam produced the greatest QF activity, with the hip in the anatomical position. This study provides an understanding of the activity demands placed on QF while walking and running. The high activity in late swing during running may signify a synergistic role with other posterior thigh muscles to control deceleration of the limb in preparation for stance.