The effect of surface on knee landing mechanics and muscle activity during a single-leg landing task in recreationally active females.

OBJECTIVE: Investigate the effect of surface on frontal plane knee angle, knee moment and muscle activity. DESIGN: Randomised cross over. SETTING: University Laboratory. METHODS: Twenty females performed single-leg hop-landings onto sand, grass and firm surfaces. Kinematic, kinetic and muscle activity data were obtained. Compatibility curves were used to visualise parameter estimates alongside P- values, and S-value transforms. RESULTS: Knee angle for firm-sand (mean difference (d)‾ = -2.2°; 95% compatibility interval (CI): -4.6 to 0.28, p = 0.083, s = 3.6) and firm-grass (d‾ = -1.9; 95% CI: -4.3 to 0.5, p = 0.125, S = 3) yielded <4 bits of reputational information against the null hypothesis (H). 5 bits (p = 0.025) of information against H were observed for knee moment between firm-sand (d‾ = 0.17 N m/kg-1. m-1; 95% CI: 0.02 to 0.31) with similar effects for firm-grass (d‾ = 0.14 N m/kg-1. m-1; 95% CI: -0.02 to 0.29, p = 0.055, S = 4). Muscle activity across surfaces ranged from almost no (S = 1) reputational evidence against H (Quadriceps and Hamstrings) to 10-13 'bits' against H for lateral gastrocnemius (lower on sand). CONCLUSIONS: Our study provides valuable information for practitioners of the observed effect sizes for lower-limb landing mechanics across surfaces in asymptomatic females.

Practitioners' perspective of non-contact injury risk factors and injury prevention programming in professional North American male soccer.

OBJECTIVE: To evaluate non-contact injury prevention strategies of professional men's soccer clubs in elite North American league soccer. To understand the application, perceived effectiveness and barriers to implementation. DESIGN: Online cross-Sectional Study. SETTING: North American elite soccer teams. PARTICIPANTS: 96 medical and performance support staff of elite North American teams. MAIN OUTCOME MEASURE: The survey consisted of 20 questions and captured 1) practitioners' demographics; 2) perceptions of risk factors; 3) the use of assessment and monitoring strategies; and 4) perceptions of the implementation of injury prevention programmes'. RESULTS: Injury prevention programmes were perceived as 'effective' (Median 4, Interquartile range 4-4) and reduced injury rates (n = 94, 98%, 95 CI% 93 to 99). A range of potential risk factors were rated as "very important" (4.58 ± 0.52 Likert scale points; mean ± standard deviation). A multi-disciplinary approach to the design, application and monitoring of programmes was generally adopted. Competing training priorities (n = 75, 78%, 95 CI% 69 to 85) and game schedules (n = 71, 74%, 95 CI% 64 to 82) were the most prevalent barriers to injury prevention implementation. CONCLUSIONS: Injury prevention programmes were perceived as effective in reducing non-contact injuries. Managing the conflicting priorities between scheduling training, tactical and conditioning goals were considered the key barriers to desired implementation.

Does UK Entry-Level Physiotherapy Education Prepare Graduates for a Future in Pediatric Clinical Practice? A Mixed-Methods Study.

AIMS: Identify the perceptions and experiences of how UK entry-level programs educationally prepared pediatric physiotherapists for their first clinical role. Review the extent programs taught essential, recommended, and additional content as per the International Organisation of Physical Therapists in Pediatrics (IOPTP). METHODS: Mixed methods design involving qualified UK pediatric physiotherapists. Forty-two physiotherapists completed an online questionnaire and nine (21%) completed a follow-up semi-structured interview. RESULTS: All 42 respondents felt they were "Not Well" (median 2, IQR 1.75-2.75) prepared for clinical practice. Not enough curricula emphasis was given to pediatric content (100%), with 31% (n = 13, CI 95% 19-46) reporting no pediatric content throughout their program. Only 15 (36%, 23-51) respondents experienced a pediatric placement. Themes from the follow-up interviews were (1) UK programs are adult focused; (2) placements are the only meaningful opportunity to develop competency; (3) programs lacked non-clinical content; and (4) experiencing pediatric patients was overwhelming due poor preparation. The majority of the IOPTP curriculum guidance is not embedded within UK curriculums. CONCLUSIONS: Respondents reported they were not well prepared for pediatric clinical practice. Some entry-level programs did not include any pediatric teaching throughout the entirety of the course.

United Kingdom physiotherapists injection therapy practice for musculoskeletal complaints: A cross-sectional survey.

BACKGROUND: Physiotherapists in the United Kingdom (UK), who have received additional training can adopt injection therapy for the treatment of musculoskeletal (MSK) disorders. OBJECTIVES: The objective of this practice survey was to explore (i) the frequency of use of injection therapy by UK physiotherapists for MSK disorders; and (ii) the clinical reasoning for selection of injectate, dose and pre/post injection practice. DESIGN: Cross-sectional online survey. METHODS: The online survey was disseminated via social media and professional networks over a 3-month period. Responses to closed multiple choice survey questions were analysed with descriptive data, with reporting of confidence intervals at 95%. Open questions were analysed using content analysis. RESULTS: The survey received 320 responses. The majority (86.6%, n = 277) used landmark guided approaches. The highest frequency of injections administered were for trigger digits, sub acromial pain and the knee joint. Corticosteroid drugs were widely used (99.7%, n = 319, CI 95% 98 to 100) with Triamcinolone (Kenalog) being the most frequently utilised for both joints (58.8%, n = 160, 53 to 65) and soft tissues (46.3%, n = 126, 40 to 52). Drug choice was largely based on availability in clinic (47.1%, n = 128, 41 to 53). Drug doses for common injection sites varied among the respondents with variation also evident in pre and post-injection practice. CONCLUSION: Marked variation across some elements of injection therapy practice was evident. Notable differences in corticosteroid preparation used, the doses of drug injected, and the use of local anaesthetic were reported by respondents. Injecting physiotherapists should endeavour to ensure practice is aligned to best available evidence.

The Effects of Exercise-Based Injury Prevention Programmes on Injury Risk in Adult Recreational Athletes: A Systematic Review and Meta-Analysis.

BACKGROUND: Injuries are common in adult recreational athletes. Exercise-based injury prevention programmes offer the potential to reduce the risk of injury and have been a popular research topic. Yet, syntheses and meta-analyses on the effects of exercise-based injury prevention programmes for adult recreational athletes are lacking. OBJECTIVES: We aimed to synthesise and quantify the pooled intervention effects of exercise-based injury prevention programmes delivered to adults who participate in recreation sports. METHODS: Studies were eligible for inclusion if they included adult recreational athletes (aged > 16 years), an exercise-based intervention and used a randomised controlled trial design. Exclusion criteria were studies without a control group, studies using a non-randomised design and studies including participants who were undertaking activity mandatory for their occupation. Eleven literature databases were searched from earliest record, up to 9 June, 2022. The Physiotherapy Evidence Database (PEDro) scale was used to assess the risk of bias in all included studies. Reported risk statistics were synthesised in a random-effects meta-analysis to quantify pooled treatment effects and associated 95% confidence intervals and prediction intervals. RESULTS: Sixteen studies met the criteria. Risk statistics were reported as risk ratios [RRs] (n = 12) or hazard ratios [HRs] (n = 4). Pooled estimates of RRs and HRs were 0.94 (95% confidence interval 0.80-1.09) and 0.65 (95% confidence interval 0.39-1.08), respectively. Prediction intervals were 0.80-1.09 and 0.16-2.70 for RR and HR, respectively. Heterogeneity was very low for RR studies, but high for HR studies (tau = 0.29, I2 = 81%). There was evidence of small study effects for RR studies, evidenced by funnel plot asymmetry and Egger's test for small study bias: - 0.99 (CI - 2.08 to 0.10, p = 0.07). CONCLUSIONS: Pooled point estimates were suggestive of a reduced risk of injury in intervention groups. Nevertheless, these risk estimates were insufficiently precise, too heterogeneous and potentially compromised by small study effects to arrive at any robust conclusion. More large-scale studies are required to clarify whether exercise-based injury prevention programmes are effective in adult recreational athletes. CLINICAL TRIAL REGISTRATION: The protocol for this review was prospectively registered in the PROSPERO database (CRD42021232697).

Elite North American soccer performance in thermally challenging environments: An explorative approach to tracking outcomes.

AIMS: The physiologic challenges related to performances in hot conditions calls for dedicated consideration when planning athlete training, although complete amelioration of the effects of heat may not be possible. We aimed to quantify within-subject correlations between different measures of environmental temperature and performance changes over multiple elite soccer competitions. METHODS: Thirty-seven elite male soccer players (age: 26 ± 3.4 years, height: 171 ± 2 cm, body mass: 78 ± 7.1 kg) competed in North America over four seasons (range: 3 to 98 matches). Players wore global positioning system devices during games and reported differential-RPE immediately post game. Temperatures at kick-off, week average temperature, the difference between game-day and week average (DiffTemp), and heat index at kick-off were obtained. Within-player correlations were calculated using general linear models to quantify associations between fluctuations in temperature measures and physical and perceived outputs. RESULTS: Correlations between total distance and the various temperature measures were trivial to small (range: -0.08 to 0.13, p=<0.001-0.02). Small negative correlations were found between all temperature measures except DiffTemp and high-speed running (HSR) (range: -0.17 to -0.14, p=<0.001). Most correlations between differential-RPE and temperature measures were trivial to small and not significant (r = 0.06 to 0.18 p = 0.03-0.92) although breathlessness-RPE and heat index showed a small significant association (P = 0.018). CONCLUSION: Decrements in HSR appear to be associated with increased environmental temperature, however, these associations are small in magnitude.

Implementing An External Student Placement Strategy Into an Undergraduate Chiropractic Curriculum in the United Kingdom: An Education Descriptive Report.

Objective: The aim of this descriptive report is to describe the development and implementation of a placement strategy into an entry-level chiropractic course within the United Kingdom. Methods: Placements are educational experiences during which students can observe or apply theory in real practice situations. For this study, the placement strategy was developed for the chiropractic program at Teesside University through an initial working group that generated its aims, objectives, and philosophy. Evaluation surveys were completed for each module containing placement hours. The median and interquartile range (IQR) were calculated for combined responses using a Likert scale (1 = strongly agree; 5 = strongly disagree). Students were allowed to provide comments. Results: A total of 42 students participated. Placement hours were divided across all taught years (Academic Year 1: 11%; Year 2: 11%; Year 3: 26%; Year 4: 52%). Data were evaluated 2 years post-launch, with 40 students reporting to be satisfied overall with Year 1 (median 1, IQR 1-2) and Year 2 (1, IQR 1-2) placement modules. Participants perceived that placement experiences were applicable to the workplace and their future careers across modules in both Year 1 (1, IQR 1-2) and Year 2 (1, IQR 1-1.5) and that continuous feedback improved their clinical learning (Year 1 [1, IQR 1-2]; Year 2 [1, IQR 1-2]). Conclusion: This report describes the strategy and student evaluation findings over its 2-year inception, exploring the principles of interprofessional learning, reflective practice, and authentic assessment. The strategy was implemented successfully following placement acquisition and auditing processes. Student feedback reported overall satisfaction with the strategy, which was associated with graduate-ready skills.

The paediatric physiotherapy curricula landscape: A survey of United Kingdom entry-level programs.

BACKGROUND AND PURPOSE: To identify the paediatric curriculum content covered in entry-level physiotherapy programs within the United Kingdom (UK), and report faculties perceived importance. Strengths, weaknesses, barriers and facilitators, to the implementation of paediatric content were explored. METHODS: A cross-sectional online questionnaire captured entry-level physiotherapy programme leaders' perceptions of paediatric programs. RESULTS: Fifty-five responses were submitted, providing a 67% completion rate. Faculty perceived that students' felt the inclusion of paediatric content within the curricula was 'Important' (Mean 3.60 ± SD 0.74). Of 30 diagnoses surveyed, only two were covered 'Well' within curriculums, despite 23 rated at least 'Important' by respondents. Of the 18 assessment/examination components, 13 were covered 'Well' with five 'Somewhat'. All were considered to be at least 'Important'. Perceived strengths were grouped into three main categories (1) integrated/lifespan approach, (2) links to clinical specialists, and (3) a broad/detailed curriculum. Perceived weaknesses included curriculum time pressures and paediatric placement availability. DISCUSSION: The majority of paediatric conditions were only somewhat covered by UK curriculums, despite respondents in the main believing they should be an important element of the entry-level syllabus. Some UK physiotherapy entry-level students may not be exposed to any paediatric teaching or clinical placements.

Do environmental temperatures and altitudes affect physical outputs of elite football athletes in match conditions? A systematic review of the 'real world' studies.

Players involved in the various football codes compete throughout the calendar year around the world. Therefore, environmental stressors such as temperature and altitude should be considered in preparation for, and during, matches. We aimed to systematically review the observational and quasi-experimental studies that have been specifically designed to quantify the effects of temperature (hot or cold) high altitude on in-match physical performance indicators. A search of electronic databases (Web of Science, Scopus, SPORTDiscus, PubMed/MEDLINE) was conducted, with 19,424 papers identified as relevant. Following sifting in relation to the eligibility criteria, 12 papers were deemed directly relevant. The reviewed studies scored 6-9 (on a 0-9 scale) for quality assessment using a previously used scale. The major outcome variables relevant to the current review were total distance (m), high-speed running (m) and high-speed runs (count) measured during matches. Standardized effect sizes (ES) were heterogeneous across studies for total distance (ES: -0.96 to -0.14) and high-speed running (ES: -0.69 to 0.12) for >1000 m vs sea-level, time spent at the given altitude being a putative factor for this heterogeneity. Heat had mainly detrimental effects on performance, but ES were, again, heterogeneous across studies (ES: -1.25 to 0.26), dependent on temperature. Given the small number of studies that involved mostly male athletes, and large heterogeneity across studies, more research needs be conducted on physical performance in these environmental conditions, with attention paid to standardizing outcomes and broadening the approaches of studies to guide future decision-making in professional sporting environments.

The use of sand as an alternative surface for training, injury prevention and rehabilitation in English professional football and barriers to implementation: a cross-sectional survey of medical staff.

PURPOSE: The purpose of the present study was to investigate the use of sand as an alternative surface for training, injury prevention and rehabilitation interventions in English professional football. A Secondary aim was to explore the potential barriers to implementation. MATERIALS AND METHODS: All 92 teams from the male English professional football pyramid during the 2021-22 season were eligible to take part. A cross-sectional survey of the medical personnel (one per club) was conducted between June 2021 and December 2021 based on the RE-AIM framework. A total of 58 respondents (63% of all clubs) completed the survey. RESULTS AND CONCLUSIONS: Only 18 (31%) of the clubs surveyed used sand-based interventions across the last 3 seasons. Respondents felt sand-based interventions would be effective at improving physiological gains (median 4, interquartile range [IQR] 4-5) and as part of injury prevention and rehabilitation strategies (4, IQR 3-4) but were indifferent in relation to its potential to improve sporting performance (3, IQR 3-4). Barriers to implementation of sand-based interventions within wider football were a lack of facilities, lack of awareness of its potential benefits, lack of high-quality evidence and the surface not being specific to the sport. Medical staff also did not perceive that coaches' positively viewed sand interventions as a training or injury management strategy.

The British Athletics Muscle Injury Classification grading system as a predictor of return to play following hamstrings injury in professional football players.

OBJECTIVES: Investigate the British Athletics Muscle Injury Classification (BAMIC) grading system as a predictor of return to play (RTP) following primary hamstring strain injury (HSI) and its agreement with the Peetron's classification system in professional footballers. METHODS: A retrospective cohort study of 39 hamstrings strains in a professional English football club were identified. Two musculoskeletal radiologists reviewed historical MRI's and classified them against the BAMIC and Peetron's grading system. Classification, oedema length and cross-sectional area were compared against RTP. RESULTS: Pearson's correlation coefficient demonstrated a weak but statistically significant correlation between BAMIC and RTP (r = 0.32; 95%CI 0.01 to 0.58; p = 0.05). Maximum length of intramuscular oedema demonstrated weak correlations with RTP (r = 0.3; 95%CI -0.02 to 0.56; p = 0.06). Percentage cross sectional demonstrated a weak correlation with RTP (r = 0.02; 95%CI -0.3 to 0.33; p = 0.91). Multiple regression demonstrated that 16% of the variance in RTP was explained by the model. Kappa for the agreement between BAMIC and Peetron's was 0.21 (95%CI 0 to 0.42). CONCLUSIONS: A significant association between the grade of HSI on the BAMIC system and RTP was found. Findings suggest BAMIC could provide valuable prognostic information on the RTP.

Student physiotherapists perceptions of online curriculum delivery during the COVID-19 pandemic.

BACKGROUND: As a result of the COVID-19 pandemic a rapid transformation from face-to-face curriculum delivery to an online teaching and learning environment, was adopted in a number of higher education institutions globally. Allied Health Profession courses such as physiotherapy, traditionally utilising an in person teaching model to prepare students for practice, needed to swiftly adopt new methods of delivery, involving both synchronous and asynchronous approaches. Understanding physiotherapy student perceptions of this transition is important to allow faculty to develop their delivery of online teaching and provide an evidence base for future course curricula. METHODS: Cross-sectional survey of UK higher education students studying either an undergraduate or post-graduate pre-registration degree in physiotherapy was conducted between October 2020 and February 2021. The survey investigated the student's perception of the transition to either an online or hybrid model of learning during the COVID-19 pandemic. A mixed method approach was adopted allowing respondents to share their experiences and facilitate the exploration of questions which required in-depth thought. RESULTS: Two hundred thirty-six respondents completed the questionnaire. Online learning was perceived to be a flexible (49%, n=116,CI 95% 43 to 55) and convenient (49, 116, 43 to 55) method of learning. Despite this, 79% of the students surveyed felt that the online learning experience had a negative impact on their understanding of the subject and were disadvantaged compared to traditional face-to-face teaching provision (mean 4.14 ± SD 1.06). Online physiotherapy delivery produced low student satisfaction, leaving respondents feeling disadvantaged. Decreased levels of engagement and the lack of ability to practice 'hands-on' skills were detrimental aspects of the online approach, with 55% (n=106) reporting they did not perceive the academic staff had the necessary skills to deliver effective online content. CONCLUSIONS: The majority of UK physiotherapy students surveyed were dissatisfied and lacked engagement with an online learning approach within the curricula, compared with the traditional face-to-face delivery. Although several positives of both a synchronous and asynchronous delivery were highlighted, faculty must consider how they best deliver online learning content, making use of pedagogical strategies that will create as many learning and engagement opportunities as possible.

The Uptake of Nordic Hamstring Exercise Program for Injury Prevention in Major League Soccer and Its Barriers to Implementation in Practice.

CONTEXT: It is well demonstrated that Nordic hamstring (NH) program has poor compliance across European soccer clubs, but little is known about its implementation in Major League Soccer (MLS). The authors aimed to investigate MLS hamstring prevention practices and compliance with the NH program and understand the reasons for its inclusion or exclusion. DESIGN: A cross-sectional electronic survey was completed by 24 of the 26 (92%) MLS top-division soccer clubs. METHODS: The survey, based on the Reach, Efficacy, Adoption, Implementation, and Maintenance framework, was sent to team medical staff. Medical staff were also asked for opinions on barriers to implementation. RESULTS: Eighteen clubs (75%) reported a formal hamstring injury prevention program, with eccentric exercises (94%; 95% CI [confidence interval], 74%-99%), high-speed running (94%; 95% CI, 74%-99%), and NH exercises (89%; 95% CI, 67%-97%) the most common strategies adopted. Fifteen clubs partially implemented the NH program, but only 5 (21%; 95% CI, 9%-40%) completed the full program and were classed as compliant. A total of 20 respondents reported that player perception and muscle soreness (83%; 95% CI, 64%-93%) were barriers to the implementation of the NH program. On a 5-point Likert scale, respondents "partially agreed" (4.13 [0.80]) that the NH exercise could substantially reduce injuries and would be "effective" at their own club (3.88 [0.61]). CONCLUSIONS: The NH exercise was valued, but negative player perception and muscular soreness were identified as barriers to implementing the full program. Manipulation of volume and frequency should inform future "effectiveness" research to prospectively assess such modifications in the context of MLS.

Chiropractic lecturer qualities: The student perspective.

OBJECTIVE: Chiropractic lecturers sit at the interface between theoretical education and the transition to clinical practice. They are central to a positive and high-quality learning environment. This study aimed to explore how chiropractic students in the United Kingdom rate the importance of lecturer qualities and their influence on overall preregistration course experience. METHODS: An online mixed-method questionnaire was used. Data were converted into proportions with lower and upper limits of the 95% confidence interval (CI). Likert-scale questions were treated as numeric variables with the mean, mode, median, and percentage calculated for combined responses. Thematic analysis reported patterns of data extracted from open-ended questions. RESULTS: Of the population of current UK chiropractic students, 195 completed the questionnaire. Five out of 12 teaching roles were rated as very important, including the ability to deliver high-quality information and evaluate the curriculum (mean = 4.71). Communication ranked as the number 1 personal quality followed by command of the subject. Lecturers were perceived as very important to overall course enjoyment (mean = 4.88) and students' ability to succeed (mean = 4.54). Students felt it was more important that lecturers were clinically active (84%; 95% CI, 78%-89%) than research active (25%; 95% CI, 19%-31%). CONCLUSION: Chiropractic students in the United Kingdom recognize the significance of lecturers in the educational experience. A range of qualities were considered important relating to overall course enjoyment and student outcomes. Clinically active lecturers facilitate student development. Of importance, students felt course evaluation and curricula development were valuable qualities in the modern-day lecturer.

The uptake of the Nordic hamstring exercise programme as an injury prevention strategy in professional cricket in the United Kingdom and barriers to implementation.

OBJECTIVES: To report hamstring prevention strategies of professional male cricket clubs in the United Kingdom, identify the application of the Nordic hamstring programme (NHP) and gain knowledge of medical teams' reasons for the NHP's inclusion or exclusion. DESIGN: Cross-sectional questionnaire. SETTING: Online survey. PARTICIPANTS: 15 (75%) of professional cricket clubs in the United Kingdom. MAIN OUTCOME MEASURES: Survey based on the RE-AIM framework. RESULTS: Twelve clubs reported having a formal hamstring injury prevention programme. The Nordic hamstring exercise and eccentric exercises (100%) were the most used interventions. Three clubs implemented the NHP, with one classed as fully compliant. Respondents partially agreed, on a 5 point Likert scale, that the Nordic hamstring exercise was effective at reducing injuries at their club (Mean 3.73 ± SD 0.70) and across professional cricket (3.87 ± 0.64). Barriers to implementation across cricket included players not positively perceiving the programme (60%) with a cultural change required (60%) for its adoption. CONCLUSIONS: The Nordic hamstring exercise is positively received by medical personnel in professional cricket in conjunction with other prevention strategies. Three clubs have utilised the NHP in the last three seasons with one club considered fully compliant. A cultural shift from players and coaches may be required for successful NHP implementation.

An exploration of UK student physiotherapists' goal setting practices within anterior cruciate ligament rehabilitation.

BACKGROUND: Anterior cruciate ligament (ACL) injuries are a common and complex injury coupled with a lengthy rehabilitation. Goal setting is said to be an effective psychological tool within ACL rehabilitation due to its simplicity and is commonly used amongst sport and health professionals. To date, literature surrounding goal setting practices has only focused on qualified therapists. PURPOSE: The central aim of this study was to explore UK student physiotherapists' perceptions towards goal setting practices used in ACL rehabilitation and whether they feel prepared for practice. METHOD: Semi-structured interviews involving 11 participants from one UK university was conducted using an inductive approach. Data analysis included thematic analysis with triangulation and a comprehensive five-stage analysis process to enhance confirmability and credibility, whilst respecting ethical considerations. RESULTS/DISCUSSION: Participants reported some understanding of goal setting and the importance of involving the patient during this process. However, participants negatively experienced goal setting practices as being mainly therapist/protocol led. The training participants received on goal setting was minimal, but further training was welcomed by all participants. The findings were consistent with previous UK and international research surrounding inadequate education and training across sport and health professionals when applying goal setting practice within ACL rehabilitation. CONCLUSION: These findings suggest that, initially, a review of the psychological content of sport and health professional courses is warranted to clearly identify potential knowledge gaps. There is also an opportunity whereby a global specialist interest group could be designed to share psychological practices and globally connect like-minded sport and health professionals together.

Influence of Lumbar Mobilizations During the Nordic Hamstring Exercise on Hamstring Measures of Knee Flexor Strength, Failure Point, and Muscle Activity: A Randomized Crossover Trial.

OBJECTIVE: The aims of this study were to quantify the effects of spinal mobilization on force production, failure point, and muscle activity of the hamstrings during the Nordic hamstring exercise (NHE), and to explore individual differences in responses. METHODS: In a replicated randomized crossover trial, 24 asymptomatic, recreationally active men (age [mean ± standard deviation]: 27 ± 6 years; body mass: 82 ± 17 kg; height: 181 ± 8 cm) completed 2 standardized intervention trials (L4/5 zygapophyseal mobilizations) and 2 control trials. The failure point of the NHE was determined with 3D motion capture. Peak force, knee flexor torque, and electromyography (EMG) of the biceps femoris were measured. Data analyses were undertaken to quantify mean intervention response and explore any individual response heterogeneity. RESULTS: Mean (95% confidence interval) left-limb force was higher in intervention than in control trials by 18.7 (4.6-32) N. Similarly, right-limb force was higher by 22.0 (3.4-40.6) N, left peak torque by 0.14 (0.06-0.22) N • m, and right peak torque by 0.14 (0.05-0.23) N • m/kg. Downward force angle was decreased in intervention vs control trials by 4.1° (0.5°-7.6°) on the side of application. Both peak EMG activity (P = .002), and EMG at the downward force (right; P = .020) increased in the intervention condition by 16.8 (7.1-26.4) and 8.8 (1.5-16.1) mV, respectively. Mean downward acceleration angle changed by only 0.3° (-8.9° to 9.4°) in intervention vs control trials. A clear response heterogeneity was indicated only for right force (Participant × Intervention interaction: P = .044; response heterogeneity standard deviation = 34.5 [5.7-48.4] N). Individual response heterogeneity was small for all other outcomes. CONCLUSION: After spinal mobilization, immediate changes in bilateral hamstring force production and peak torque occurred during the NHE. The effect on the NHE failure point was unclear. Electromyographic activity increased on the ipsilateral side. Response heterogeneity was generally similar to the random trial-to-trial variability inherent in the measurement of the outcomes.

A call for more psychological skills training: Examining the views of qualified and student sports therapists in the United Kingdom.

CONTEXT: Sports therapists can influence an athlete's psychological response to injury. At present it is unclear whether sports therapists are sufficiency trained in psychology. OBJECTIVES: To understand the views both of practising clinicians and students regarding the extent to which sports therapy education addresses psychological factors in injury management. DESIGN: Cross-sectional study. SETTING: Online Questionnaire. PARTICIPANTS: Qualified sports therapists (n = 30) and sports therapy students, (n = 33). INTERVENTIONS: Sports Therapist and Sport Psychology Questionnaire. MAIN OUTCOME MEASURES: The questionnaire included five subsets of questions (5-point Likert scale or multiple-choice). Internal consistency of each subset was rated via Cronbach's alpha (α, 95% confidence interval) as good (questions 5 & 6; α 0.81, 0.68 to 0.88) or as excellent (scale questions 3-4; α 0.91, 0.85-0.95, question 8, α 0.97, 9.6 to 9.8, questions 7, 11 & 12; α 0.94, 0.91-0.96; and questions 9 & 10, α 0.96, 9.4-9.8). RESULTS: Both groups recognised psychological components as either 'important' or 'very important' in rehabilitation. They reported a need for psychological skills in injury management, and more psychology training during education. While 80% of qualified therapists identified a duty to treat psychological components, only 45% of students concurred. CONCLUSIONS: Future sports therapy education should consider placing greater emphasis on the psychological components of injury management in order to sufficiently equip therapists with appropriate skills for practice.

Effect of Sand on Knee Load During a Single-Leg Jump Task: Implications for Injury Prevention and Rehabilitation Programs.

Richardson, MC, Murphy, S, Macpherson, T, English, B, Spears, I, and Chesterton, P. Effect of sand on knee load during a single-leg jump task: implications for injury prevention and rehabilitation programs. J Strength Cond Res 34(11): 3164-3172, 2020-The purpose of the study was to determine potential differences in landing strategies and subsequent joint loads at the knee (knee abduction moment [KAM], anterior-posterior [AP] tibial translation, and total knee shear force) when jumping onto sand and firm ground from both a level surface and a 30-cm height. Firm ground would act as the control for the study. Seventeen subjects (age: 23.6 ± 3.7 years; body mass: 67.7 ± 10.3 kg; height: 168.5 ± 7.4 cm) performed 3 single-leg jumps on their dominant leg for each of the 4 conditions tested (ground level, sand level, ground height, and sand height). A repeated-measures design investigated the effect of sand on KAM, AP tibial translation, and total knee shear force. Data were analyzed using magnitude-based inferences and presented as percentage change with 90% confidence limits. Results indicated that sand had a clear beneficial effect on KAM, which was possibly moderate during a drop jump (30 cm) and possibly small from a level jump. Sand also had a possibly moderate beneficial effect on AP tibial translation from a level jump. The effect of sand on total knee shear force was unclear. These results suggest that sand may provide a safer alternative to firm ground when performing jump tasks commonly used in anterior cruciate ligament and patellofemoral joint injury prevention and rehabilitation programs. Sand may also allow for an accelerated rehabilitation program because jumping activities could potentially be implemented more safely at an earlier stage in the process.

Differential Ratings of Perceived Match and Training Exertion in Girls' Soccer.

PURPOSE: To understand the validity of differential ratings of perceived exertion (dRPE) as a measure of girls' training and match internal loads. METHODS: Using the centiMax scale (CR100), session dRPE for breathlessness (sRPE-B) and leg muscle exertion (sRPE-L) were collected across a season of training (soccer, resistance, and fitness) and matches from 33 players (15 [1] y). Differences and associations between dRPE were examined using mixed and general linear models. The authors' minimal practical important difference was 8 arbitrary units (AU). RESULTS: Mean (AU [SD] ∼16) sRPE-B and sRPE-L were 66 and 61 for matches, 51 and 49 for soccer, 86 and 67 for fitness, and 45 and 58 for resistance, respectively. Session RPE-B was rated most likely harder than sRPE-L for fitness (19 AU; 90% confidence limits: ±7) and most likely easier for resistance (-13; ±2). Match (5; ±4) and soccer (-3; ±2) differences were likely to most likely trivial. The within-player relationships between sRPE-B and sRPE-L were very likely moderate for matches (r = .44; 90% confidence limits: ±.12) and resistance training (.38; ±.06), likely large for fitness training (.51; ±.22), and most likely large for soccer training (.56; ±.03). Shared variance ranged from 14% to 35%. CONCLUSIONS: Practically meaningful differences between dRPE following physical training sessions coupled with low shared variance in all training types and matches suggest that sRPE-B and sRPE-L represent unique sensory inputs in girls' soccer players. The data provide evidence for the face and construct validity of dRPE as a measure of internal load in this population.