Medicine and Health Sciences Commons^™

Association Between Physical Activity And Reduced Mortality In Inoperable Lung Cancer, Vinicius Cavalheri, Isis Grigoletto, Joanne Mcveigh, David Manners, Terry Boyle, Carolyn J. Peddle-Mcintyre, Rajesh Thomas, Jeanie Leong, Samantha Bowyer, Kirsten Mooney, Leon Straker, Daniel A. Galvão

Research outputs 2022 to 2026

We examined device-measured physical activity (PA) and sedentary behaviour at the time of diagnosis in people with inoperable lung cancer and investigated their associations with 12-month mortality. The people with inoperable lung cancer wore an accelerometer for seven days prior to the treatment commencement. The analysed PA/sedentary behaviour variables included light-intensity PA, moderate-to-vigorous-intensity PA (MVPA), step count, the total time spent sedentary, and the usual sedentary bout duration. The data on the disease stage, clinical covariates and 12-month mortality were extracted from medical records. Cox regression models were used to estimate the association between the PA measures and 12-month mortality, …

Training For “Worst-Case” Scenarios In Sidestepping: Unifying Strength And Conditioning And Perception–Action Approaches, Daniel Kadlec, Matt Miller-Dicks, Sophia Nimphius

Research outputs 2022 to 2026

Sidesteps can impose high demands on the knee joint and lead to non-contact anterior cruciate ligament (ACL) injuries. Understanding how different constraints shape an athlete’s movement strategy and the associated joint demands can help design training interventions to increase injury resilience. Motor capacities, such as muscular strength and power, act as boundaries for the safe execution of perceptual–motor skills and co-determine the emergence of unique movement strategies. Increasing single- and multi-joint strength enables a broader solution space for movement strategies and increases load tolerance. Manipulating task constraints during sidesteps can be used in the training process to systematically expose athletes …

Cluster Sets To Prescribe Interval Resistance Training: A Potential Method To Optimise Resistance Training Safety, Feasibility And Efficacy In Cardiac Patients, Kimberley L. Way, Hannah J. Thomas, Lewan Parker, Andrew Maiorana, Michelle A. Keske, David Scott, Jennifer L. Reed, Jessica Tieng, Daniel Hackett, Tess Hawkins, Christopher Latella, Rachael Cordina, Derek L. Tran

Research outputs 2022 to 2026

The integration of resistance training for cardiac patients leads to important health outcomes that are not optimally obtained with aerobic exercise; these include an increase in muscle mass, maintenance of bone mineral density, and improvements in muscular fitness parameters. Despite the proliferation of evidence supporting resistance exercise in recent decades, the implementation of resistance training is underutilised, and prescription is often sub-optimal in cardiac patients. This is frequently associated with safety concerns and inadequate methods of practical exercise prescription. This review discusses the potential application of cluster sets to prescribe interval resistance training in cardiac populations. The addition of planned, …

Eccentric Muscle Actions Add Complexity To An Already Inconsistent Resistance Exercise Nomenclature, James L. Nuzzo, Kazunori Nosaka

Research outputs 2022 to 2026

An eccentric muscle action (or contraction) is defined as active muscle lengthening against resistance, which occurs when the force generated by the muscle is smaller than the resistance placed upon it. Eccentric resistance exercise, which involves multiple sessions of repeated eccentric muscle actions, improves muscle strength and other health outcomes. In response to this evidence, new exercise technologies have been developed to permit feasible completion of eccentric muscle actions outside of the laboratory. Consequently, participation in eccentric resistance exercise is projected to increase in the future, and communications about eccentric resistance exercise are likely to reach a wide audience, including …

Effects Of Exercise Training On Muscle Quality In Older Individuals: A Systematic Scoping Review With Meta-Analyses, Tibor Hortobágyi, Tomas Vetrovsky, Jennifer S. Brach, Martijn Van Haren, Krystof Volesky, Regis Radaelli, Pedro Lopez, Urs Granacher

Research outputs 2022 to 2026

Background: The quantity and quality of skeletal muscle are important determinants of daily function and metabolic health. Various forms of physical exercise can improve muscle function, but this effect can be inconsistent and has not been systematically examined across the health-neurological disease continuum. The purpose of this systematic scoping review with meta-analyses was to determine the effects and potential moderators of exercise training on morphological and neuromuscular muscle quality (MMQ, NMQ) in healthy older individuals. In addition and in the form of a scoping review, we examined the effects of exercise training on NMQ and MMQ in individuals with neurological …

What Is The Prevalence Of General Anxiety Disorder And Depression Symptoms In Semi-Elite Australian Football Players: A Cross-Sectional Study, Anthony Henderson, Sarah A. Harris, Troy Kirkham, Jonathon Charlesworth, Myles C. Murphy

Research outputs 2022 to 2026

Background: The prevalence of anxiety and depression symptoms in semi-elite Australian footballers is unknown. The primary objective of this study was to determine the prevalence of generalised anxiety disorder (GAD) and depressive symptoms in semi-elite Australian Football players. Our secondary objective was to explore the association between demographic and football-specific factors with GAD and depressive symptoms. A cross-sectional epidemiological study including 369 semi-elite Western Australian Football League (WAFL) players from the Men and Women’s 2022 season (n = 337 men, 91%) was conducted. Symptoms of depression were measured using the Patient Health Questionnaire-9 scale (PHQ-9) and symptoms of GAD with …

What Are The Most Effective Exercise, Physical Activity And Dietary Interventions To Improve Body Composition In Women Diagnosed With Or At High-Risk Of Breast Cancer? A Systematic Review And Network Meta-Analysis, Christine Kudiarasu, Pedro Lopez, Daniel A. Galvão, Robert U. Newton, Dennis R. Taaffe, Lorna Mansell, Brianna Fleay, Christobel Saunders, Caitlin Fox-Harding, Favil Singh

Research outputs 2022 to 2026

Background: Obesity has been recognized as a risk factor in the development and recurrence of breast cancer and is also associated with poor prognostic outcomes. This systematic review and network meta-analysis aimed to identify the most effective exercise, physical activity, and dietary interventions to reduce fat mass, body fat percentage and body weight as well as potentially increase lean mass in women diagnosed with or at high risk of breast cancer. Methods: A systematic search of databases was performed up to May 2022. Eligible randomized controlled trials examined the effects of exercise, physical activity and/or dietary interventions on fat mass …

The Kneeling Isometric Plantar Flexor Test: Preliminary Reliability And Feasibility In Professional Youth Football, John J. Mcmahon, Nicholas J. Ripley, Paul Comfort, Francisco J. Robles-Palazón, Jack T. Fahey, Andrew J. Badby, Christopher Bramah

Research outputs 2022 to 2026

Calf injuries are common in professional football; thus, the establishment of reliable and time-efficient methods of measuring the peak force capabilities of the plantar flexors with equipment that is accessible to football practitioners is valuable. In this study, we determined the preliminary reliability and feasibility of a new test, termed the kneeling isometric plantar flexion test (KIPFT), for footballers. Twenty-one male youth footballers (age = 17.8 ± 1.1 years, height = 182 ± 5 cm, weight = 77.6 ± 5.9 kg) from English League One football clubs completed three trials of the KIPFT on a wireless force plate at the …

Supporting Adolescents' Participation In Muscle-Strengthening Physical Activity: Protocol For The 'Resistance Training For Teens' (Rt4t) Hybrid Type Iii Implementation-Effectiveness Trial, Hayden T. Kelly, Jordan J. Smith, Angeliek Verdonschot, Sarah G. Kennedy, Joseph J. Scott, Heather Mckay, Nicole Nathan, Rachel Sutherland, Philip J. Morgan, Jo Salmon, Dawn Penney, James Boyer, Rhodri S. Lloyd, Christopher Oldmeadow, Penny Reeves, Kirrilly Pursey, Myna Hua, Sarah Longmore, Jennifer Norman, Alexander Voukelatos, Avigdor Zask, David R. Lubans

Research outputs 2022 to 2026

INTRODUCTION: In Australia, only 22% of male and 8% of female adolescents meet the muscle-strengthening physical activity guidelines, and few school-based interventions support participation in resistance training (RT). After promising findings from our effectiveness trial, we conducted a state-wide dissemination of the 'Resistance Training for Teens' (RT4T) intervention from 2015 to 2020. Despite high estimated reach, we found considerable variability in programme delivery and teachers reported numerous barriers to implementation. Supporting schools when they first adopt evidence-based programmes may strengthen programme fidelity, sustainability, and by extension, programme impact. However, the most effective implementation support model for RT4T is unclear. OBJECTIVE: …

Time To Consider The Potential Role Of Alternative Resistance Training Methods In Cancer Management?, Francesco Bettariga, Chris Bishop, Dennis R. Taaffe, Daniel A. Galvão, Luca Maestroni, Robert U. Newton

Research outputs 2022 to 2026

Exercise has emerged as fundamental therapeutic medicine in the management of cancer. Exercise improves health-related outcomes, including quality of life, neuromuscular strength, physical function, and body composition, and it is associated with a lower risk of disease recurrence and increased survival. Moreover, exercise during or post cancer treatments is safe, can ameliorate treatment-related side effects, and may enhance the effectiveness of chemotherapy and radiation therapy. To date, traditional resistance training (RT) is the most used RT modality in exercise oncology. However, alternative training modes, such as eccentric, cluster set, and blood flow restriction are gaining increased attention. These training modalities …

Force Plate Methodologies Applied To Injury Profiling And Rehabilitation In Sport: A Scoping Review Protocol, Francisco J. Robles-Palazón, Paul Comfort, Nicholas J. Ripley, Lee Herrington, Christopher Bramah, John J. Mcmahon

Research outputs 2022 to 2026

Musculoskeletal injuries are a common health problem among sporting populations. Such injuries come with a high financial burden to the involved organisations and can have a detrimental impact on the career attainment of injured individuals. Force plates are now a common tool available to sport and exercise science and medicine professionals to enable them to profile injury risk predisposition and modulate the rehabilitation process within sporting environments. This is because contemporary force plate technology is portable and affordable and often comes with software that enables the automatic and immediate feedback of test variables to key stakeholders. However, to our knowledge, …

The Predictive Validity Of Individualised Load–Velocity Relationships For Predicting 1rm: A Systematic Review And Individual Participant Data Meta-Analysis, Leon Greig, Rodrigo R. Aspe, Andy Hall, Paul Comfort, Kay Cooper, Paul A. Swinton

Research outputs 2022 to 2026

Background: Load–velocity relationships are commonly used to estimate one-repetition maximums (1RMs). Proponents suggest these estimates can be obtained at high frequencies and assist with manipulating loads according to session-by-session fluctuations. Given their increasing popularity and development of associated technologies, a range of load–velocity approaches have been investigated. Objective: This systematic review and individual participant data (IPD) meta-analysis sought to quantify the predictive validity of individualised load–velocity relationships for the purposes of 1RM prediction. Methods: In September 2022, a search of MEDLINE, SPORTDiscus, Web of Science and Scopus was conducted for published research, with Google Scholar, CORE and British Ethos also …

Effects Of Unilateral Eccentric Versus Concentric Training Of Nonimmobilized Arm During Immobilization, Trevor C. Chen, Shang-Hen Wu, Hsin-Lian Chen, Wei-Chin Tseng, Kuo-Wei Tseng, Hsing-Yu Kang, Kazunori Nosaka

Research outputs 2022 to 2026

Introduction The present study tested the hypothesis that eccentric training (ET) of nonimmobilized arm would attenuate negative effects of immobilization and provide greater protective effects against muscle damage induced by eccentric exercise after immobilization, when compared with concentric training (CT). Methods Sedentary young men were placed to ET, CT, or control group (n = 12 per group), and their nondominant arms were immobilized for 3 wk. During the immobilization period, the ET and CT groups performed five sets of six dumbbell curl eccentric-only and concentric-only contractions, respectively, at 20%-80% of maximal voluntary isometric contraction (MVCiso) strength over six sessions. MVCiso …

Muscle Fatigue During Maximal Eccentric-Only, Concentric-Only, And Eccentric-Concentric Bicep Curl Exercise With Automated Drop Setting, James L. Nuzzo, Matheus D. Pinto, Kazunori Nosaka

Research outputs 2022 to 2026

Connected adaptive resistance exercise (CARE) machines are new technology purported to adjust resistance exercise loads in response to muscle fatigue. The present study examined muscle fatigue (strength loss, fatigue perceptions) during maximal eccentric-only (ECCmax-only), concentric-only (CONmax-only), and coupled ECC-CON (ECCmax-CONmax) bicep curl exercise on a CARE machine. Eleven men and nine women completed the three protocols in separate sessions and in random order. All protocols included 4 sets of 20 maximal effort muscle contractions. Strength loss was calculated as Set 4 set end load minus Set 1 highest load. The CARE machine's algorithm adjusted resistances automatically, permitting continued maximal effort …

Differences In Trapezius Muscle H-Reflex Between Asymptomatic Subjects And Symptomatic Shoulder Pain Subjects, Ana S.C. Melo, Janet L. Taylor, Ricardo Ferreira, Bruno Cunha, Manuel Ascenção, Mathieu Fernandes, Vítor Sousa, Eduardo B. Cruz, J. Paulo Vilas-Boas, Andreia S.P. Sousa

Research outputs 2022 to 2026

In chronic shoulder pain, adaptations in the nervous system such as in motoneuron excitability, could contribute to impairments in scapular muscles, perpetuation and recurrence of pain and reduced improvements during rehabilitation. The present cross-sectional study aims to compare trapezius neural excitability between symptomatic and asymptomatic subjects. In 12 participants with chronic shoulder pain (symptomatic group) and 12 without shoulder pain (asymptomatic group), the H reflex was evoked in all trapezius muscle parts, through C3/4 nerve stimulation, and the M-wave through accessory nerve stimulation. The current intensity to evoke the maximum H reflex, the latency and the maximum peak-to-peak amplitude of …

The Validity Of Hawkin Dynamics Wireless Dual Force Plates For Measuring Countermovement Jump And Drop Jump Variables †, Andrew J. Badby, Peter D. Mundy, Paul Comfort, Jason P. Lake, John J. Mcmahon

Research outputs 2022 to 2026

Force plate testing is becoming more commonplace in sport due to the advent of commercially available, portable, and affordable force plate systems (i.e., hardware and software). Following the validation of the Hawkin Dynamics Inc. (HD) proprietary software in recent literature, the aim of this study was to determine the concurrent validity of the HD wireless dual force plate hardware for assessing vertical jumps. During a single testing session, the HD force plates were placed directly atop two adjacent Advanced Mechanical Technology Inc. in-ground force plates (the “gold standard”) to simultaneously collect vertical ground reaction forces produced by 20 participants (27 …

Moderate To Vigorous-Intensity Continuous Training Versus High-Intensity Interval Training For Improving Vo2max In Women: A Systematic Review And Meta-Analysis, Robert Lindner, Isaac Selva Raj, Angela W. H. Yang, Shadman Zaman, Brianna Larsen, Joshua Denham

Research outputs 2022 to 2026

Traditional continuous training and high-intensity interval training (HIIT) can increase maximal oxygen uptake (VO2max). However, there is conflicting evidence regarding which form of training demonstrates the greatest improvements to VO2max, and data in women is sparse. We conducted a systematic review and meta-analyses to assess whether moderate to vigorous-intensity continuous training (MVICT) or HIIT was superior at improving VO2max in women. Randomised controlled and parallel studies examined the influence of MVICT and/or HIIT on VO2max in women. There was no statistical difference in VO2max improvements after training between women in the MVICT and HIIT cohorts (mean difference [MD]: −0.42, 95%CI: …

Low Pre-Season Hamstring-To-Quadriceps Strength Ratio Identified In Players Who Further Sustained In-Season Hamstring Strain Injuries: A Retrospective Study From A Brazilian Serie A Team, Filipe Veeck, Cassio V. Ruas, Matheus Daros Pinto, Rafael Grazioli, Gustavo Pacheco Cardoso, Thiago Albuquerque, Lucas Schipper, Henrique Gonçalves Valente, Victor H. Santos, Márcio Dornelles, Paulo Rabaldo, Clarice S. Rocha, Bruno Manfredini Baroni, Eduardo Lusa Cadore, Ronei Silveira Pinto

Research outputs 2022 to 2026

A common pre-season injury prevention assessment conducted by professional football clubs is the hamstring-to-quadriceps (H:Q) strength ratio calculated by peak torque (PT). However, it is debatable whether players that present low pre-season H:Q ratios are more susceptible to further sustaining in-season hamstring strain injuries (HSI). Based upon retrospective data from a Brazilian Serie A football squad, a particular season came to our attention as ten out of seventeen (~59%) professional male football players sustained HSI. Therefore, we examined the pre-season H:Q ratios of these players. H:Q conventional (CR) and functional (FR) ratios, and the respective knee extensor/flexor PT from the …

Running Marathons In High School: A 5-Year Review Of Injury In A Structured Training Program, Mary A. Kennedy, Lauren V. Fortington, Matt Penney, Nicolas H. Hart, Pierre A. D’Hemecourt, Dai Sugimoto

Research outputs 2022 to 2026

Objective: The aim in this study was to quantify the number, nature, and severity of injuries sustained by male and female high school students who took part in a running training program that culminated in the completion of a half or full marathon. Design: This study is a retrospective clinical audit. Methods: Injury reports from high school students (grades 9 – 12) who participated in a half or full marathon 30-week progressive training program comprising four training days per week (three running days and one cross-training day) were reviewed. The number of runners completing a marathon, together with the number, …

“I Lied A Little Bit.” A Qualitative Study Exploring The Perspectives Of Elite Australian Athletes On Self-Reported Data, Molly Coventry, Amanda Timler, Andrea B. Mosler, Kylie Russell, Mervyn Travers, Lauren Mitchell Oam, Myles C. Murphy

Research outputs 2022 to 2026

Objectives: Explore the perceptions and experiences of elite Australian athletes’ engagement with reporting data in surveillance systems. Design: Qualitative Descriptive. Setting: Semi-structured interviews conducted using Zoom. Participants: We recruited 13 elite Australian athletes competing at a national or international level for semi-structured interviews. Main outcome measures: Audio recordings were transcribed using DeScript, checked for errors and imported into QSR NVIVO. Thematic analysis using QSR NVIVO was used to determine key themes from transcripts. Results: Thematic analysis uncovered four key themes: ‘the paradox of reporting’, ‘data for data's sake’, ‘eyes on reporting’ and ‘athlete friendly reporting’. Conclusion: Athletes perceived reporting as …

Effect Of Additional Nordic Hamstring Exercise Or Sprint Training On The Modifiable Risk Factors Of Hamstring Strain Injuries And Performance, Nicholas J. Ripley, Matthew Cuthbert, Paul Comfort, John J. Mcmahon

Research outputs 2022 to 2026

The Nordic hamstring exercise (NHE) has commonly been investigated in isolation, however, within practice multiple modalities are commonly incorporated. However, the NHE has a low level of compliance within sport, with sprinting being potentially being preferred. The present study aimed to observe the effect of a lower-limb program with either additional NHE or sprinting on the modifiable risk factors hamstring strain injury (HSI) and athletic performance. 38 collegiate athletes were randomly assigned into three groups: control standardised lower-limb training program (n = 10 (2 female, 8 male), age = 23.50 ± 2.95 years, height = 1.75 ± 0.09 m, mass …

Citation Impact And Reach Of The Ioc Sport And Exercise Medicine Consensus Statements, Lauren V. Fortington, Rebecca N. Handcock, Wayne Derman, Carolyn A. Emery, Kati Pasanen, Martin Schwellnus, Evert Verhagen, Caroline F. Finch

Research outputs 2022 to 2026

Background: Research evidence is commonly compiled into expert-agreed consensus statements or guidelines, with an increasing trend towards their publication in peer-reviewed journals. Prominent among these has been the publication of several International Olympic Committee (IOC) tatements to help inform sport and exercise medicine (SEM) practice. This study aimed to assess the citation impact and reach of the IOC statements published between 2003 and 2020. Method: Bibliometric analysis focused on identifying core publications (original statement and linked publications) and quantifying their academic citations (number and Field-Weighted Citation Impact (FWCI)) in journal articles up to February 2022. The analysis includes descriptive data …

Validity And Reliability Of Inertial Measurement System For Linear Movement Velocity In Flywheel Squat Exercise, Sergio Maroto-Izquierdo, Kazunori Nosaka, Jesús Alarcón-Gómez, Fernando Martín-Rivera

Research outputs 2022 to 2026

The aim of this study was to examine the validity and reliability of an Inertial Measurement System integrated into a secondary pulley (IMS) for determining linear velocity during flywheel squat exercises. Thirty-one male participants who were highly experienced in a flywheel resistance exercise training performed flywheel squat exercises with three incremental loads, and mean velocity (MV), mean propulsive velocity (MPV) and max velocity (Vmax) of the exercises were simultaneously recorded with a validated linear encoder and the IMS, in two different sessions. Validity was analyzed using ordinary least products regression (OLP), Lin’s concordance correlation coefficient (CCC), and Hedge’s g for …

Experience, Training Preferences, And Fighting Style Are Differentially Related To Measures Of Body Composition, Strength, And Power In Male Brazilian Jiu Jitsu Athletes - A Pilot Study, Christian G. Almeda, Gerald T. Mangine, Zackary H. Green, Yuri Feito, Duncan N. French

Research outputs 2022 to 2026

To examine relationships between Brazilian Jiu Jitsu (BJJ) descriptors (belt rank, experience, gi preference, and fighting style), resistance training (RT) experience, and measures of body composition, strength (maximal handgrip, 3-5-repetition maximum [RM] in barbell glute bridge [GB], prone bench row [PBR], and bench press [BP]), and velocity (GB, PBR, and BP at 7 kg and 30 – 60 % 1-RM), 13 experienced (4.3 ± 3.4 years) BJJ athletes were recruited for this cross-sectional, pilot study. Significant (p < 0.05) Kendall’s tau and Bayesian relationships were seen between belt rank and body fat percentage (τ = − 0.53, BF₁₀ = 6.5), BJJ experience and body fat percentage (τ = − 0.44 to − 0.66, BF₁₀ = 2.6 – 30.8) and …

Adaptive Goal Processes And Underlying Motives That Sustain Mental Wellbeing And New Year Exercise Resolutions, Joanne M. Dickson, Amelia Hart, Caitlin Fox-Harding, Christopher D. Huntley

Research outputs 2022 to 2026

Exercise resolutions are the most common goals people set each New Year. However, research has rarely examined adaptive goal processes and motives that may maintain wellbeing and resolution pursuit. We therefore investigated if (1) personal goal flexibility and tenacity maintain mental wellbeing and adherence to New Year exercise resolutions and if (2) underlying intrinsic and extrinsic motives maintain wellbeing and sustained exercise resolution adherence. A community sample (N = 297) completed an online longitudinal study. At baseline, participants listed their most important exercise-related New Year resolution. Participants then completed measures to assess goal flexibility and tenacity, resolution motives, and mental …

Prehabilitative Versus Rehabilitative Exercise In Prostate Cancer Patients Undergoing Prostatectomy, Favil Singh, Robert U. Newton, Dennis R. Taaffe, Pedro Lopez, Jeff Thavaseelan, Matthew Brown, Elayne Ooi, Kazunori Nosaka, Dickon Hayne, Daniel A. Galvão

Research outputs 2022 to 2026

Purpose: The study compared the efficacy of commencing supervised exercise in men with prostate cancer before and after prostatectomy on objective and patient-reported outcomes, hospital length of stay, and urinary incontinence. Methods: Forty-one men were randomised to a 6-week prehabilitation or rehabilitation exercise programme. Prehabilitation involved resistance and aerobic exercise thrice weekly pre-surgery, while rehabilitation comprised the same commencing 6-weeks post-surgery. Assessments included strength, function (chair rise, stair climb, 400-m, 6-m usual, fast, and backwards walk), body composition, fatigue and quality of life, undertaken at pre-surgery, early post-surgery and late post-surgery phase, with urinary incontinence (24-h pad test) assessed at …

Maximal Number Of Repetitions At Percentages Of The One Repetition Maximum: A Meta-Regression And Moderator Analysis Of Sex, Age, Training Status, And Exercise, James L. Nuzzo, Matheus D. Pinto, Kazunori Nosaka, James Steele

Research outputs 2022 to 2026

The maximal number of repetitions that can be completed at various percentages of the one repetition maximum (1RM) [REPS ~ %1RM relationship] is foundational knowledge in resistance exercise programming. The current REPS ~ %1RM relationship is based on few studies and has not incorporated uncertainty into estimations or accounted for between-individuals variation. Therefore, we conducted a meta-regression to estimate the mean and between-individuals standard deviation of the number of repetitions that can be completed at various percentages of 1RM. We also explored if the REPS ~ %1RM relationship is moderated by sex, age, training status, and/or exercise. A total of …

Injury Profiles Of Police Recruits Undergoing Basic Physical Training: A Prospective Cohort Study, Nicole Merrick, Nicolas H. Hart, Andrea B. Mosler, Garth Allen, Myles C. Murphy

Research outputs 2022 to 2026

Purpose:

A lack of published epidemiological data among police recruits presents a major challenge when designing appropriate prevention programs to reduce injury burden. We aimed to report the injury epidemiology of Western Australian (WA) Police Force recruits and examine sex and age as injury risk factors

Methods:

Retrospective analyses were conducted of prospectively collected injury data from WA Police Force recruits between 2018–2021. Injury was defined as ‘time-loss’ and injury incidence rate per 1000 training days (Poisson exact 95% confidence intervals) was calculated. For each region and type of injury, the incidence, severity, and burden were calculated. The association between …

More Than Energy Cost: Multiple Benefits Of The Long Achilles Tendon In Human Walking And Running, Anthony J. Blazevich, Jared R. Fletcher

Research outputs 2022 to 2026

Elastic strain energy that is stored and released from long, distal tendons such as the Achilles during locomotion allows for muscle power amplification as well as for reduction of the locomotor energy cost: as distal tendons perform mechanical work during recoil, plantar flexor muscle fibres can work over smaller length ranges, at slower shortening speeds, and at lower activation levels. Scant evidence exists that long distal tendons evolved in humans (or were retained from our more distant Hominoidea ancestors) primarily to allow high muscle–tendon power outputs, and indeed we remain relatively powerless compared to many other species. Instead, the majority …

The Stability Of The Deadlift Three Repetition Maximum, Stuart N. Guppy, Tsuyoshi Nagatani, Wayne C. K. Poon, Kristina L. Kendall, Jason P. Lake, G. Gregory Haff

Research outputs 2022 to 2026

This study investigated the stability of three repetition maximum (3RM) strength during the deadlift. Eleven participants performed four testing sessions comprising a one repetition maximum test and 3RM tests separated by 48 h. Preparedness was assessed before each testing session using countermovement jumps and by measuring barbell velocity during each set of deadlifts. Trivial statistically significant differences were determined for the 3RM between T1 and both T2 (p = 0.012; ES [95% CI] = −0.1 [−0.58, 0.41]) and T3 (p = 0.027; ES [95% CI] = −0.09 [−0.57, −0.43]). No significant differences were noted between T2 and T3 …