Sports Sciences Commons^™

Forecasting Neuromuscular Recovery After Anterior Cruciate Ligament Injury: Athlete Recovery Profiles With Generalized Additive Modeling, Matthew J. Jordan, Nathaniel Morris, Jeremiah Barnert, Drew Lawson, Isabel Aldrich Witt, Walter H Herzog

Research outputs 2022 to 2026

A retrospective analysis of longitudinally collected athlete monitoring data wasconducted to generate a model of neuromuscular recovery after anterior cruciateligament (ACL) injury and reconstruction (ACLR). Neuromuscular testing data in-cluding countermovement jump (CMJ) force‐time asymmetries and knee extensorstrength (maximum voluntary contractionext) asymmetries (between‐limb asymmetryindex—AI) were obtained from athletes with ACLR using semitendinosus (ST) au-tograft (n= 29; AI measurements: n= 494), bone patellar tendon bone autograft(n= 5; AI measurements:n= 88) and noninjured controls (n= 178; AI measurements:n= 3188). Explosive strength measured as the rate of torque development was alsocalculated. CMJ force‐time asymmetries were measured over discrete movementphases (eccentric deceleration phase, concentric phase). …

Relationship Between Nordic Hamstring Strength And Maximal Voluntary Eccentric, Concentric And Isometric Knee Flexion Torque, Satoru Nishida, Masatoshi Nakamura, Ryosuke Kiyono, Shigeru Sato, Koki Yasaka, Riku Yoshida, Kazunori Nosaka

Research outputs 2022 to 2026

Nordic hamstring exercise is performed to prevent knee flexor muscle strain injuries and used to assess their injury risks. However, what exactly Nordic hamstring strength indicates is not clear. We investigated the relationship between Nordic hamstring strength and maximal voluntary contraction (MVC) torque of the knee flexors measured by an isokinetic dynamometer. Sixteen healthy young men who had not experienced hamstring strain injuries participated in the study. In Nordic hamstring, each participant was instructed to lean forward as far as possible in 3 s (approximately 30/s), and force at the ankle joint of the dominant leg was measured during the …

Increases In Integrin-Ilk-Rictor-Akt Proteins, Muscle Mass, And Strength After Eccentric Cycling Training, Georgios Mavropalias, Yu-Fu Wu, Marni D. Boppart, Anthony J. Blazevich, Kazunori Nosaka

Research outputs 2022 to 2026

Purpose: Recently, it has been suggested that a cellular pathway composed of integrin, integrin-linked kinase (ILK), rapamycin-insensitive companion of mTOR (RICTOR), and Akt may facilitate long-term structural and functional adaptations associated with exercise, independent of the mTORC1 pathway. Therefore, we examined changes in integrin-ILK-RICTOR-Akt protein in vastus lateralis (VL) before and after 8 wk of eccentric cycling training (ECC), which was expected to increase muscle function and VL cross-sectional area (CSA).

Methods: Eleven men (23 ± 4 yr) completed 24 sessions of ECC with progressive increases in intensity and duration, resulting in a twofold increase in work from the first …

Nationwide Industry-Led Community Exercise Program For Men With Locally Advanced, Relapsed, Or Metastatic Prostate Cancer On Androgen-Deprivation Therapy, Oliver Schumacher, Daniel A. Galvao, Dennis R. Taaffe, Nigel Spry, Dickon Hayne, Colin Tang, Raphael Chee, Robert U. Newton

Research outputs 2022 to 2026

Purpose:

Androgen-deprivation therapy in patients with prostate cancer (PCa) is associated with considerable side effects and secondary comorbidities such as overweight/obesity and cardiovascular disease. The aim of this study was to investigate the effectiveness of an industry-led, treatment-integrated, community-based exercise program on outcomes of body weight, cardiovascular health, and physical function.

Patients and Methods:

PCa patients with locally advanced, relapsed, or metastatic disease receiving leuprorelin acetate were enrolled across multiple sites in Australia and assigned supervised group exercise undertaken weekly or biweekly (ie, 16 exercise sessions in total) for 10-18 weeks, consisting of aerobic and resistance training performed at moderate-to-vigorous …

Injury Surveillance In Community Cricket: A New Inning For South Africa, Benita Olivier, Oluchukwu L. Obiora, Candice Macmillan, Caroline Finch

Research outputs 2022 to 2026

Published injury rates amongst elite and club-level youth cricketers highlight the need to implement injury risk-reducing strategies amongst the youth cricketing population. Data from sports injury surveillance systems are a prerequisite for the development and evaluation of strategies to reduce injury risk. Therefore, collecting injury surveillance data is a positive move towards reducing injuries in cricket. In South Africa, a systematic, standardised, evidence-informed injury surveillance system currently does not exist for community levels of play, namely, in cricket-playing high schools and cricket clubs. Although injury surveillance systems exist at elite levels, the obvious differences in elite versus community cricket settings …

Development And Field Testing Of A Standardised Goal Setting Package For Person-Centred Discharge Care Planning In Stroke, Rebecca Barnden, Dominique A. Cadilhac, Natasha A. Lannin, Ian Kneebone, Deborah Hersh, Erin Godecke, Rene Stolwyk, Tara Purvis, Rebecca Nicks, Michelle Farquhar, Stephanie Gleeson, Carol Gore, Kelsie Herrmann, Nadine E. Andrew

Research outputs 2022 to 2026

Objective: Develop and test a person-centred goal-setting package for discharge care planning in acute and rehabilitation stroke units. Methods: A multidisciplinary, expert working group (n = 15), and consumer group (n = 4) was convened. A multistage iterative approach was used to develop and test the package. Stages included: (i) contextual understanding, (ii) package development, and (iii) clinician training and field-testing in acute and rehabilitation settings. Observational field notes were taken and clinicians' perspectives captured using semi-structured focus groups post-testing. Results: The final package included a 34-item menu aligned with a manual containing: guideline summaries; common goals; goal metrics based …

The Agreement Between A Portable Contact-Mat And Force-Plates During Bilateral Vertical Jumps, Stuart N. Guppy, Yosuke Kotani, Jason Lake, Christopher Latella, Jodie Cochrane Wilkie, Kristina Kendall, G. Gregory Haff

Research outputs 2022 to 2026

Force plates are commonly used when assessing vertical jumping performance but are not always affordable or practical tools for all testing situations. Twenty-four participants volunteered to take part in a study investigating the agreement between bilateral force plates and a new commercially available contact mat that records jump height, flight-time (FT), and FT of individual limbs during both countermovement (CMJ) and squat (SJ) jumps. Each participant performed six jumps of each type while standing on a contact mat placed upon a pair of in-ground force plates. When compared to the force plate via ordinary least products regression, the contact mat …

The Influence Of Self-Reported Total Sleep Time And Sleep Quality On Physical Performance In Junior Tennis Players, Mitchell Turner, Johnny Lo, Philipp Beranek, Ian Dunican, Travis Miles Cruickshank

Research outputs 2022 to 2026

Studies have shown the importance of sleep on tennis skill execution; however, its influence on physical performance metrics is unclear. This study aimed to examine the extent to which sleep duration and sleep quality metrics influence physical performance metrics in junior tennis players. Thirty-six junior tennis players from Australia and Germany completed the Consensus Sleep Diary over seven nights. A novel total sleep score based on current National Sleep Foundation recommendations was generated (calculated as the percentage of the average standardised sleep metrics), for each player. Players’ physical performance was measured using a comprehensive tennis-specific testing battery. This included sit …

Squat And Countermovement Jump Performance Across A Range Of Loads: A Comparison Between Smith Machine And Free Weight Execution Modes In Elite Sprinters, Irineu Loturco, Michael R. Mcguigan, Tomás T. Freitas, Fábio Y. Nakamura, Daniel A. Boullosa, Pedro L. Valenzuela, Lucas A. Pereira, Fernando Pareja-Blanco

Research outputs 2022 to 2026

The aims of this study were to: 1) provide and compare the height achieved during Smith machine (SM) and free weight (FW) loaded jumps executed over a wide spectrum of loads (40–120 % of body mass [BM]); and 2) test the difference between loaded and unloaded squat jump (SJ) and countermovement jump (CMJ) attempts in ten highly trained male sprinters. On the first visit, athletes performed unloaded SJ and CMJ, loaded SJ with loads corresponding to 40, 60, 80, 100, and 120 % BM, and loaded CMJ at 100% BM using an Olympic barbell (FW). On the second visit, they …

Exercise Recommendations For People With Bone Metastases: Expert Consensus For Healthcare Providers And Clinical Exercise Professionals, Kristin L. Campbell, Prue Cormie, Sarah Weller, Shabbir M. H. Alibhai, Kate A. Bolam, Anna Campbell, Andrea L. Cheville, Mary-Ann Dalzell, Nicolas H. Hart, Celestia S. Higano, Kirstin Lane, Sami Mansfield, Margaret L. Mcneely, Robert U. Newton, Morten Quist, Jennifer Rauw, Friederike Rosenberger, Daniel Santa Mina, Kathryn H. Schmitz, Kerri M. Winters-Stone, Joachim Wiskemann, Jennifer Goulart

Research outputs 2022 to 2026

Purpose: Exercise has been underutilized in people with advanced or incurable cancer despite the potential to improve physical function and reduce psychosocial morbidity, especially for people with bone metastases because of concerns over skeletal complications. The International Bone Metastases Exercise Working Group (IBMEWG) was formed to develop best practice recommendations for exercise programming for people with bone metastases on the basis of published research, clinical experience, and expert opinion. Methods: The IBMEWG undertook sequential steps to inform the recommendations: (1) modified Delphi survey, (2) systematic review, (3) cross-sectional survey to physicians and nurse practitioners, (4) in-person meeting of IBMEWG to …

Voluntary Activation Of Muscle In Humans: Does Serotonergic Neuromodulation Matter?, Justin J. Kavanagh, Janet L. Taylor

Research outputs 2022 to 2026

Ionotropic inputs to motoneurones have the capacity to depolarise and hyperpolarise the motoneurone, whereas neuromodulatory inputs control the state of excitability of the motoneurone. Intracellular recordings of motoneurones from in vitro and in situ animal preparations have provided extraordinary insight into the mechanisms that underpin how neuromodulators regulate neuronal excitability. However, far fewer studies have attempted to translate the findings from cellular and molecular studies into a human model. In this review, we focus on the role that serotonin (5-HT) plays in muscle activation in humans. 5-HT is a potent regulator of neuronal firing rates, which can influence the force …

Comparison Of Weightlifting, Traditional Resistance Training And Plyometrics On Strength, Power And Speed: A Systematic Review With Meta-Analysis, Stephanie J. Morris, Jon L. Oliver, Jason S. Pedley, G. Gregory Haff, Rhodri S. Lloyd

Research outputs 2022 to 2026

Background:

Weightlifting training (WLT) is commonly used to improve strength, power and speed in athletes. However, to date, WLT studies have either not compared training effects against those of other training methods, or been limited by small sample sizes, which are issues that can be resolved by pooling studies in a meta-analysis. Therefore, the objective of this systematic review with meta-analysis was to evaluate the effects of WLT compared with traditional resistance training (TRT), plyometric training (PLYO) and/or control (CON) on strength, power and speed.

Methods:

The systematic review included peer-reviewed articles that employed a WLT intervention, a comparison group …

Musculoskeletal Injury Epidemiology In Law Enforcement And Firefighter Recruits During Physical Training: A Systematic Review, Myles Calder Murphy, Holly-Ann George, Muhammad Naqi, Patrick J. Owen, Paola Chivers, Nicolas H. Hart

Research outputs 2022 to 2026

Objectives: Report the injury epidemiology of law enforcement and firefighter recruits. Design: A systematic epidemiological review following the Preferred Reporting Items for Systematic Reviews and Meta-Analyses 2020 guidelines was completed. Data sources: Five online databases were searched from database inception to 5 May 2021. Eligibility criteria for selecting studies: Prospective and retrospective studies that reported data on musculoskeletal injuries sustained by law enforcement or firefighter recruits were included. We reported on all components of injury where data were available. All injury incidence rates were calculated as per 1000 training days (Poisson 95% CI) to allow comparisons between studies. Study quality …

Exercise In Advanced Prostate Cancer Elevates Myokine Levels And Suppresses In-Vitro Cell Growth, Jin Soo Kim, Dennis R. Taaffe, Daniel A. Galvão, Nicolas H. Hart, Elin Gray, Charles J. Ryan, Stacey A. Kenfield, Fred Saad, Robert U. Newton

Research outputs 2022 to 2026

Background:

Altering the systemic milieu through exercise has been proposed as a potential mechanism underlying exercise-driven tumour suppression. It is not yet known whether men with advanced prostate cancer can elicit such adaptations following a program of exercise. The purpose is to examine myokine levels of serum acquired from metastatic castrate-resistant prostate cancer (mCRPC) patients recruited to the INTERVAL-GAP4 trial before and after 6 months of exercise and its tumour-suppressive effect.

Methods:

Twenty-five men with mCRPC (age = 74.7 ± 7.1 yrs) were randomised to supervised multimodal (aerobic and resistance) exercise (EX) or self-directed exercise control group (CON). Body composition …

Pre-Season Body Composition Has Minimal Influence On In-Season Match Availability, And Match Performance In Female Australian Football League (Aflw) Players, Callum J. Mccaskie, Marc Sim, Robert U. Newton, Jarryd Heasman, Brent Rogalski, Nicolas H. Hart

Research outputs 2022 to 2026

This study examined the relationship between pre-season body composition, in-season match performance, and match availability in female players competing in the Australian Football League Women's (AFLW) competition. With the outlawing of body composition assessments as part of pre-draft player evaluations in the AFLW, this study seeks to examine whether this is justified. Twenty-two (n = 22) players had body composition assessed with dual-energy x-ray absorptiometry at the beginning of the 2021 AFLW pre-season (whole-body and regional fat mass and lean soft-tissue mass [LSTM]). In-season match availability and match performance data (Coaches Score [CS], Champion Data Player Rank, average disposals, disposal …

Sport-Specific Crossover Point Differences During A Maximal Oxygen Consumption Test, Joseph R. Stanzione, George A. Brooks, Michael L. Bruneau, Duncan N. French, Jennifer A. Nasser, Sinclair A. Smith, Stella L. Volpe

Research outputs 2022 to 2026

Introduction/Purpose: The crossover point occurs during exercise when one transitions energy substrates from fat to carbohydrate predominance. The crossover point varies in an intensity-dependent manner; however, less is known about its specificity in sports with varying metabolic demands. The purpose of our study was to determine if various sports yield differences in the time to crossover and heart rate and percentage of maximal oxygen consumption (V O2max) at crossover during a standardized exercise protocol.

Methods: A total of 77 athletes (39 women, 38 men; 39.1 + 10.4 yr of age) were measured for respiratory exchange ratio during a modified Taylor …

Impact Of Covid-19 Lockdown On Physical Activity Behaviours Of Older Adults Who Participated In A Community-Based Exercise Program Prior To The Lockdown, Kaoru Nosaka, Caitlin Fox-Harding, Kazunori Nosaka

Research outputs 2022 to 2026

This study investigated the impact of the 2020 COVID-19 lockdown on community-dwelling older adults attending a community-based exercise program to seek strategies to keep them active during self-isolated situations. A two-phase mixed methods approach included a survey followed by in-person focus groups. Forty-eight participants, with 32 starting a community-based exercise program before the lockdown and 16 joining the program after the lockdown, completed a questionnaire survey about physical activities before and during the lockdown. This was followed by three focus groups (26 participants in total) to identify factors influencing physical activity behaviours found in the survey. The survey found that …

Changes In Body Composition In Patients With Malignant Pleural Mesothelioma And The Relationship With Activity Levels And Dietary Intake, Emily Jeffery, Y. C. Gary Lee, Robert U. Newton, Philippa Lyons-Wall, Joanne Mcveigh, Deirdre B. Fitzgerald, Leon Straker, Carolyn J. Peddle-Mcintyre

Research outputs 2022 to 2026

Background:

Skeletal muscle loss is common in advanced cancer and is associated with negative outcomes. In malignant pleural mesothelioma (MPM), no study has reported body composition changes or factors associated with these changes. This study aimed to describe changes in body composition over time and its relationship with activity levels, dietary intake and survival.

Methods:

The study was a secondary analysis of data collected from a longitudinal observational study of patients with MPM. Participants completed 3-month assessments for up to 18 months. Participants with two dual-energy x-ray absorptiometry (DXA) scans were included. Changes in appendicular skeletal muscle mass (ASM) and …

Barriers And Facilitators To Exercise Among Adult Cancer Survivors In Singapore, Alexandre Chan, Kayleen Ports, Patricia Neo, Mothi Babu Ramalingam, Ang Tee Lim, Benedict Tan, Nicolas H. Hart, Raymond J. Chan, Kiley Loh

Research outputs 2022 to 2026

Purpose:

Exercise can help cancer survivors manage sequela, treatment side effects, improve overall quality of life, and is recommended for most. The purpose of this study was to investigate exercise behavior and factors influencing exercise engagement among cancer survivors at the National Cancer Centre, Singapore (NCCS).

Methods:

This cross-sectional study was inclusive of survivors of all cancer types and stages who were at least 21 years of age and had undergone chemotherapy at the NCCS. Surveys were utilized to assess survivor barriers and facilitators to exercise and to retrospectively assess physical activity and exercise behaviors at 4 cancer-related time periods …

Walking Improvement In Chronic Incomplete Spinal Cord Injury With Exoskeleton Robotic Training (Wise): A Randomized Controlled Trial, Dylan J. Edwards, Gail Forrest, Mar Cortes, Margaret M. Weightman, Cristina Sadowsky, Shuo-Hsiu Chang, Kimberly Furman, Amy Bialek, Sara Prokup, John Carlow, Leslie Vanhiel, Laura Kemp, Darrell Musick, Marc Campo, Arun Jayaraman

Research outputs 2022 to 2026

Study design:

Clinical trial.

Objective:

To demonstrate that a 12-week exoskeleton-based robotic gait training regimen can lead to a clinically meaningful improvement in independent gait speed, in community-dwelling participants with chronic incomplete spinal cord injury (iSCI).

Setting:

Outpatient rehabilitation or research institute.

Methods:

Multi-site (United States), randomized, controlled trial, comparing exoskeleton gait training (12 weeks, 36 sessions) with standard gait training or no gait training (2:2:1 randomization) in chronic iSCI ( > 1 year post injury, AIS-C, and D), with residual stepping ability. The primary outcome measure was change in robot-independent gait speed (10-meter walk test, 10MWT) post 12-week intervention. Secondary …

Strength Training In Swimming, Klaus Wirth, Michael Keiner, Stefan Fuhrmann, Alfred Nimmerichter, Gregory G. Haff

Research outputs 2022 to 2026

This narrative review deals with the topic of strength training in swimming, which has been a controversial issue for decades. It is not only about the importance for the performance at start, turn and swim speed, but also about the question of how to design a strength training program. Different approaches are discussed in the literature, with two aspects in the foreground. On the one hand is the discussion about the optimal intensity in strength training and, on the other hand, is the question of how specific strength training should be designed. In addition to a summary of the current …

The Relationship Between Acute Exercise-Induced Changes In Extramuscular Connective Tissue Thickness And Delayed Onset Muscle Soreness In Healthy Participants: A Randomized Controlled Crossover Trial, Sarah Tenberg, Kazunori Nosaka, Jan Wilke

Research outputs 2022 to 2026

Background The extramuscular connective tissue (ECT) has been shown to play a significant role in mechanical force transmission between musculoskeletal structures. Due to this and owing to its tight connection with the underlying muscle, the ECT may be vulnerable to excessive loading. The present study aimed to investigate the effect of eccentric elbow flexor exercise on the morphology of the biceps brachii ECT. In view of the high nociceptive capacity of the ECT, an additional objective was to elucidate the potential relationship between ECT damage and the occurrence of delayed onset muscle soreness (DOMS). Methods Eleven healthy participants (♂ = …

Exploring Moderators Of The Effect Of High Vs. Low-To-Moderate Intensity Exercise On Cardiorespiratory Fitness During Breast Cancer Treatment – Analyses Of A Subsample From The Phys-Can Rct, Ann Christin Helgesen Bjørke, Laurien M. Buffart, Truls Raastad, Ingrid Demmelmaier, Andreas Stenling, Karin Nordin, Sveinung Berntsen

Research outputs 2022 to 2026

Introduction

The results from the physical training and cancer randomized controlled trial (Phys-Can RCT) indicate that high intensity (HI) strength and endurance training during (neo-)adjuvant cancer treatment is more beneficial for cardiorespiratory fitness (CRF, measured as peak oxygen uptake [VO₂peak]) than low-to-moderate intensity (LMI) exercise. Adherence to the exercise intervention and demographic or clinical characteristics of patients with breast cancer undergoing adjuvant treatment may moderate the exercise intervention effect on VO₂peak. In this study, the objective was to investigate whether baseline values of VO2peak, body mass index (BMI), time spent in moderate- to vigorous-intensity physical activity …

Exercise In Preventing Falls For Men With Prostate Cancer: A Modelled Cost-Utility Analysis, Kim Edmunds, Paul Scuffham, Robert U. Newton, Daniel A. Galvão, Haitham Tuffaha

Research outputs 2022 to 2026

Introduction:

Men who receive androgen deprivation therapy (ADT) for prostate cancer (PCa) are a vulnerable falls population due to the side effects of treatment. The purpose of this paper is to determine the cost-effectiveness of exercise in preventing falls and fractures for this high-risk population in Australia.

Methods:

A decision analytic model was constructed to evaluate the cost utility of an exercise intervention compared to usual care from a health system perspective. The intervention comprised two 1-h sessions of supervised exercise per week over 1 year for men with non-metastatic PCa receiving curative radiation therapy and ADT. A Markov model …

Elastic Tubes: The Ideal Equipment For Telehealth Exercise Medicine In The Management Of Prostate Cancer?, Georgios Mavropalias

Research outputs 2022 to 2026

Prostate cancer (PCa) affects 1 in 8 men, but exercise therapy has been shown to be a very effective intervention not only to induce physiological benefits but to also reduce the side effects of cancer treatments typically administered during PCa. The COVID19 pandemic has restricted access to exercise clinics, a problem which always existed for people living in rural and remote areas. This caused many exercise physiologists and researchers to transition their clinic-based exercise to online, home-based exercise. We would like to propose that researchers and exercise physiologists should consider the use of elastic tubes in both research and the …