Sports Sciences Commons^™

Role Of Lactic Acidosis As A Mediator Of Sprint-Mediated Nausea, Robert J. Merrells, Ashely J. Cripps, Paola T. Chivers, Paul A. Fournier

Research outputs 2014 to 2021

This study aims to determine whether there is a relationship between nausea level and lactic acidosis during recovery from sprinting. In all, 13 recreationally active males completed a 60 s bout of maximal intensity cycling. Prior to and for 45 min following exercise, blood pH, pCO₂, and lactate levels were measured together with nausea. In response to sprinting, nausea, lactate, and H⁺ concentrations increased and remained elevated for at least 10 min (p < .001), whereas pCO₂ increased only transiently (p < .001) before falling below pre‐exercise levels (p < .001), with all these variables returning toward pre‐exercise levels during recovery. Both measures of nausea adopted for analyses (nausea profile, NP; visual analogue scale, VAS), demonstrated significant repeated measures correlation (rmcorr) post‐exercise between nausea and plasma lactate (VAS and NPr_rm> 0.595, p < .0001) and H⁺ concentrations (VAS and NPr_rm> 0.689, p < .0001), but an inconsistent relationship with pCO₂ (VAS r_rm = …

Velocity-Based Training: Monitoring, Implementation And Effects On Strength And Power, Henry G. Banyard

Theses: Doctorates and Masters

Traditionally, resistance training has been prescribed using percent-based training (PBT) methods that use the loads relative to a maximal load lifted for one repetition (1RM). However, PBT does not take into account possible day-to-day fluctuations in performance that may occur from physical or psychological stressors. One approach to address this limitation is to monitor velocity changes during resistance training, based on research showing that declines in velocity are highly correlated with fatigue. Therefore, velocity-based training (VBT) methods are proposed to provide a more objective method to modify resistance training sessions based on individual differences in day-to-day performance and the rate …

The Influence Of Barbell And Body Position On Force-Time Characteristics In The Isometric Mid-Thigh Pull, Stuart Nathan Guppy

Theses: Doctorates and Masters

Publication 1: The Isometric Mid-Thigh Pull: A Review and Methodology – Part 1 Isometric tests are commonly used to monitor physical qualities that underpin athletic performance. As single-joint laboratory-based tests display poor relationships to the multi-joint movements found in sport, multi-joint isometric tests like the isometric midthigh pull (IMTP) are commonly used instead. Force-time characteristics in these multijoint tests typically display stronger relationships to dynamic performance, particularly in the case of the isometric mid-thigh pull. As such this review focuses on the relationships between force-time characteristics in the IMTP and dynamic athletic performance.

Publication 2: The Isometric Mid-Thigh Pull: A …

Risk Perceptions For Exertional Heat Illnesses In Junior Cricket In Sri Lanka, Prasanna Janaka Gamage, Lauren Victoria Fortington, Caroline F. Finch

Research outputs 2014 to 2021

Objectives Exertional heat illnesses (EHI) can occur when sport is played in hot and humid environments, such as those common across Asia. Measures to reduce the risk of EHI are important; however, causal data on EHI occurrence are limited and challenging to capture. To gain an initial understanding of EHI risks, we aimed to assess the risk perceptions of EHI of youth cricketers. Methods A descriptive cross-sectional survey, comprised of 14 questions on EHI risks, was conducted with 365 Sri Lankan junior male cricketers (age=12.9±0.9 years) who typically play in hot and humid conditions. Results For climate related risks, relative …

Finding Your Balance: An Investigation Of Recovery–Stress Balance In Vocational Dance Training, Peta Blevins, Shona Erskine, Luke Hopper, Gene Moyle

Research outputs 2014 to 2021

Professional dance careers require years of intensive training. Stress experienced during training must be balanced with adequate recovery to prevent overtraining and burnout. Little is known, however, about how dancers achieve recovery–stress balance. This study examined dancers’ recollection of stress and recovery during their vocational dance training to identify potential stressors and recovery behaviors in vocational dance training. Twelve current and ex-professional ballet (n=4) and contemporary dancers (n=8) participated in the study. Four general dimensions, based on the extant overtraining literature in athletes, were identified: dance culture, intrapersonal, interpersonal, and situational factors. Cultural norms, health factors related to injury and …

Considerations When Assessing Endurance In Combat Sport Athletes, Oliver R. Barley, Dale W. Chapman, Stuart N. Guppy, Chris R. Abbiss

Research outputs 2014 to 2021

Combat sports encompass a range of sports, each involving physical combat between participants. Such sports are unique, with competitive success influenced by a diverse range of physical characteristics. Effectively identifying and evaluating each characteristic is essential for athletes and support staff alike. Previous research investigating the relationship between combat sports performance and measures of strength and power is robust. However, research investigating the relationship between combat sports performance and assessments of endurance is less conclusive. As a physical characteristic, endurance is complex and influenced by multiple factors including mechanical efficiency, maximal aerobic capacity, metabolic thresholds, and anaerobic capacities. To assess …

Time-To-Event Analysis For Sports Injury Research Part 1: Time-Varying Exposures, Rasmus Oestergaard Nielsen, Michael Lejbach Bertelsen, Daniel Ramskov, Merete Møller, Adam Hulme, Daniel Theisen, Caroline F. Finch, Lauren Victoria Fortington, Mohammad Ali Mansournia, Erik Thorlund Parner

Research outputs 2014 to 2021

BACKGROUND: ‘How much change in training load is too much before injury is sustained, among different athletes?’ is a key question in sports medicine and sports science. To address this question the investigator/practitioner must analyse exposure variables that change over time, such as change in training load. Very few studies have included time-varying exposures (eg, training load) and time-varying effect-measure modifiers (eg, previous injury, biomechanics, sleep/stress) when studying sports injury aetiology.

AIM: To discuss advanced statistical methods suitable for the complex analysis of time-varying exposures such as changes in training load and injury-related outcomes.

CONTENT: Time-varying exposures and time-varying effect-measure …

Time-To-Event Analysis For Sports Injury Research Part 2: Time-Varying Outcomes, Rasmus Oestergaard Nielsen, Michael Lejbach Bertelsen, Daniel Ramskov, Merete Møller, Adam Hulme, Daniel Theisen, Caroline F. Finch, Lauren Victoria Fortington, Mohammad Ali Mansournia, Erik Thorlund Parner

Research outputs 2014 to 2021

BACKGROUND: Time-to-event modelling is underutilised in sports injury research. Still, sports injury researchers have been encouraged to consider time-to-event analyses as a powerful alternative to other statistical methods. Therefore, it is important to shed light on statistical approaches suitable for analysing training load related key-questions within the sports injury domain.

CONTENT: In the present article, we illuminate: (i) the possibilities of including time-varying outcomes in time-to-event analyses, (ii) how to deal with a situation where different types of sports injuries are included in the analyses (ie, competing risks), and (iii) how to deal with the situation where multiple subsequent injuries …

Anxious Or Empowered? A Cross-Sectional Study Exploring How Wearable Activity Trackers Make Their Owners Feel, Jillian Ryan, Sarah Edney, Carol Maher

Research outputs 2014 to 2021

Background The market for wearable activity trackers has grown prolifically in recent years, with increasing numbers of consumers using them to track, measure, and ideally improve their health and wellbeing. Empirical evidence tends to support wearables as valid, reliable, and effective health behaviour change tools, however little research has been conducted to understand experiential aspects of the devices, particularly thier effects on users’ psychological wellbeing and affect. This study addresses this literature gap by exploring wearable users’ affective responses to their devices and how these relate to personality traits and individual differences. Methods Data were collected from adult wearable users …

Analysis Of Perceptual-Motor Calibration Processes In Indoor Climbing, Andrew Stephen Walsh

Theses: Doctorates and Masters

This research programme examines how people perceive maximal reach-and grasp-ness in climbing, and as such these questions will be limited to climbing.

Is experienced gained from performing daily submaximal reaching sufficient for the accurate perception of maximal horizontal reaching affordances in rock climbing?

How is perception of maximal horizontal boundary of reach-and grasp-ness affected by: hold size, body position, additional load, or fatigue.

How will inducing fatigue affect how a participant calibrates distance and their movement economy?

The Manifestations Of Fatigue In Amateur Boxing Performance, Emily C. Dunn

Theses: Doctorates and Masters

A subjective method of judgment, the “Ten Point Must-System” (TPMS), was introduced into amateur boxing in 2013. To be successful, boxers must deliver forceful punches and exert dominance over an opponent. There has been limited research examining the strategies used by boxers to win fights under the TPMS and whether these strategies induce fatigue that is sufficient to significantly affect punch force. The overall objective of the five studies contained in this thesis was to describe, in relation to fatigue, the performance characteristics of male amateur boxers under the TPMS, and improve our understanding of the physical characteristics associated with …

The Application Of Maximal Mean And Critical Speed And Metabolic Powers For The Quantification Of External Load In Soccer, Cameron Nicholas Lord

Theses: Doctorates and Masters

In Association football, often referred to as “soccer”, competitive match play is typically known to represent the greatest physical demand that players experience. The demands associated with match running performance may impact training outcomes and injury risk. As a result, practitioners evaluate these demands to ensure that performance is optimised. To assist in this process, global positioning systems (GPS) are typically used to quantify displacement variables and, more recently, the interaction between running speed and acceleration. However, traditional player monitoring methods tend to apply identical and somewhat arbitrary displacement, velocity and acceleration bands to describe movement “intensity”, and thus to …

Identifikasi Profil Antropometri Dan Pemenuhan Zat Gizi Atlet Difabel Tenis Meja Di Indonesia, Mirza Hapsari Sakti Titis Penggalih, Kurnia Maratus Solichah, Diana Pratiwi, Ibtidau Niamilah, Mustika Cahya Nirmala Dewinta, Almira Nadia, Marina Dyah Kusumawati, Christofer Siagian, Rora Asyulia

Jurnal Keolahragaan

Para-atlet dikenal juga dengan sebutan atlet yang menyandang disabilitas pada bagian tertentu. Pembagian cabang olahraga pada difabel atlet hampir sama dengan atlet umumnya, namun memiliki penyesuaian terhadap jenis cacat fisik yang dialami. Tujuan penelitian ini untuk mengetahui dan mengidentifikasi profil antropometri dan pemenuhan asupan zat gizi pada atlet difabel tenis meja. Metode yang digunakan pada studi ini adalah deskriptif kuantitatif. Populasi dalam penelitian ini yaitu atlet difabel tenis meja di bawah pengawasan Kementrian Pemuda dan Olahraga, Indonesia yang sedang melakukan training centre untuk persiapan Sea Games 2017. Sampel yang diikutkan dalam penelitian ini yaitu seluruh populasi atlet difabel tenis meja …

Strategies And Challenges Associated With Recruiting Retirement Village Communities And Residents Into A Group Exercise Intervention, Rachel L. Duckham, Jamie L. Tait, Caryl A. Nowson, Kerrie M. Sanders, Dennis R. Taaffe, Keith D. Hill, Robin M. Daly

Research outputs 2014 to 2021

BACKGROUND: Randomized controlled trials (RCTs) provide the highest level of scientific evidence, but successful participant recruitment is critical to ensure the external and internal validity of results. This study describes the strategies associated with recruiting older adults at increased falls risk residing in retirement villages into an 18-month cluster RCT designed to evaluate the effects of a dual-task exercise program on falls and physical and cognitive function.

METHODS: Recruitment of adults aged ≥65 at increased falls risk residing within retirement villages (size 60-350 residents) was initially designed to occur over 12 months using two distinct cohorts (C). Recruitment occurred via …

Mechanical Suppression Of Osteolytic Bone Metastases In Advanced Breast Cancer Patients: A Randomised Controlled Study Protocol Evaluating Safety, Feasibility And Preliminary Efficacy Of Exercise As A Targeted Medicine, Nicolas H. Hart, Daniel A. Galvão, Christobel Saunders, Dennis R. Taaffe, Kynan T. Feeney, Nigel A. Spry, Daphne Tsoi, Hilary Martin, Raphael Chee, Tim Clay, Andrew D. Redfern, Robert U. Newton

Research outputs 2014 to 2021

BACKGROUND: Skeletal metastases present a major challenge for clinicians, representing an advanced and typically incurable stage of cancer. Bone is also the most common location for metastatic breast carcinoma, with skeletal lesions identified in over 80% of patients with advanced breast cancer. Preclinical models have demonstrated the ability of mechanical stimulation to suppress tumour formation and promote skeletal preservation at bone sites with osteolytic lesions, generating modulatory interference of tumour-driven bone remodelling. Preclinical studies have also demonstrated anti-cancer effects through exercise by minimising tumour hypoxia, normalising tumour vasculature and increasing tumoural blood perfusion. This study proposes to explore the promising …

The Current State Of Subjective Training Load Monitoring—A Practical Perspective And Call To Action, Joseph O. C. Coyne, G. Gregory Haff, Aaron J Coutts, Robert U. Newton, Sophia Nimphius

Research outputs 2014 to 2021

This commentary delivers a practical perspective on the current state of subjective training load (TL) monitoring, and in particular sessional ratings of perceived exertion, for performance enhancement and injury prevention. Subjective measures may be able to reflect mental fatigue, effort, stress, and motivation. These factors appear to be important moderators of the relationship TL has with performance and injury, and they also seem to differ between open and closed skill sports. As such, mental factors may affect the interaction between TL, performance, and injury in different sports. Further, modeling these interactions may be limited due to the assumption that an …

Noncontact Anterior Cruciate Ligament Injuries In Collegiate Female Soccer Players: The Effects Of A Four-Week Prevention Program On Landing Kinematics, Tess K. Marcordes

ELAIA

Background Noncontact anterior cruciate ligament (ACL) injuries are highly prevalent in soccer as quick changes in direction, stop-start motions, as well as jumping and landing often paired with shooting or passing a ball, are occurring continuously throughout a practice or match. Exaggeration of these movements with extreme joint motions increases the likelihood of ACL injury. An ACL injury can be detrimental to an athlete’s career, as 25% of athletes with such injuries do not return to their pre-injury level of play (Padua, DiStefano, Beutler, de la Motte, DiStefano, and Marshall, 2015). Myer, Ford, McLean, and Hewitt (2006), Garcia (2011), and …

The Invisible Brain Injury Crisis, Michael E. Rosenthal

Capstones

According to the Center for Disease Control and Prevention’s 2013 data, over 282,000 hospitalizations and 2.5 million emergency department visits were at least in part attributable to TBI. In the same year, about 56,000 people died.

Emergency departments in 2012 treated about 329,290 kids under 20 for TBI following an injury taking place during physical activity.

This project explores the rise in traumatic brain injuries and examines the difficult path that some of the survivors have to go through during recovery. By telling the story through my own personal experiences, I guide the reader through what the initial trauma and …

The Relationship Of Force-Time Variables Between The Loaded Squat Jump And The Midthigh Block Clean Pull, Hannah Marie Macke

Theses and Dissertations from 2018

Loaded squat jumps and midthigh block clean pulls are exercises that can be used in a strength and conditioning program to increase lower-body power. Lower-body power is critical in jumping, sprinting, and other sport specific movements. Intensities of 45-pound barbell, 20%, 40%, and 60% of a high-force, low-velocity movement were used to assess the force-time variables of the loaded squat jump and midthigh block clean pull. The current study compared peak power output as well as peak barbell velocity to find which exercise and intensity combination would be most beneficial for an athlete to increase lower-body power. A linear position …

Correction To: Hif Prolyl Hydroxylase Inhibition Protects Skeletal Muscle From Eccentric Contraction Induced Injury, Andrew N. Billin, Samuel E. Honeycutt, Alan V. Mcdougal, Jaclyn P. Kerr, Zhe Chen, Johannes M. Freudenberg, Deepak K. Rajpal, Guizhen Luo, Henning Fritz Kramer, Robert S. Geske, Frank Fang, Bert Yao, Richard V. Clark, John Lepore, Alex Cobitz, Ram Miller, Kazunori Nosaka, Aaron C. Hinken, Alan J. Russell

Research outputs 2014 to 2021

Following publication of the original article [1], the authors flagged that there is a discrepancy with the Availability of data and materials statement on page 12 of the article.