Medicine and Health Sciences Commons^™

The Effect Of Vertically- And Horizontally-Directed Plyometric Exercise On Sprint Running Performance, Ben Campbell Thomasian

Theses: Doctorates and Masters

The purpose of this investigation was to determine the effect of 6 weeks of vertically- and horizontally-directed lower-body plyometric exercise with vertically versus horizontally biased ground force application, on 40-m sprint running time, vertical jumping height, body composition and gastrocnemius medialis (GM) muscle architecture. Male (n = 19) and female (n = 20) recreational athletes were recruited and stratified according to 40 m sprinting ability, then randomly allocated to one of two groups: horizontally-directed plyometric training (HT) and vertically-directed plyometric training (VT).

The groups performed the experimental procedures twice each week with the same number of total ground contacts, while …

The Development Of An Objective Multi-Dimensional Approach To Talent Identification In Junior Australian Football, Carl T C Woods

Theses: Doctorates and Masters

Talent identification (TID) is a pertinent component of the sports science discipline given the considerable influence it may have within the pursuit of excellence. Thus, research has attempted to identify the determinants of a talented performance through the use of objective testing procedures. However, many of these ‘traditional’ approaches have been operationalised by mono-dimensional objective physical performance tests that do not inherently account for the multi-dimensional requisites of game-play, particularly within a team sporting context. This is problematic when attempting to identify talent, as a successful performance in team sports is often the combination of physical, technical and tactical elements. …

Accurate Modelling And Positioning Of A Magnetically-Controlled Catheter Tip, Vi T. H. Le

Theses: Doctorates and Masters

This thesis represents the initial phase of a proposed operator and patient friendly method designed to semi-automate the positioning and directing of an intravascular catheter in the human heart using a variable electromagnetically induced field to control a catheter tip equipped with three tiny fixed magnets oriented in XYZ planes. Here we demonstrate a comprehensive mathematical model which accurately calculates the magnetic field generated by the electromagnet system, and the magnetic torques and forces exerted on a three-magnet tip catheter. From this we have developed an iterative predictive computer algorithm to show the displacement and deflection of the catheter tip. …

The Impact Of Nursing A Significant Other In The Course Of Employment, Tania Arnold

Theses: Doctorates and Masters

This thesis describes the experiences of nurses and midwives working in metropolitan hospitals who cared for a significant other in their role of employment.

The absence of research directly related to this topic guided the exploration of individuals’ experiences to establish base line knowledge relating to this phenomenon.

This study used descriptive research to provide information relating to the personal and professional effects on nurses who were required to, chose to or had no choice but to care for a significant other in their role of employment. An on-line survey gathered demographic, Likert scale responses to evaluate impact on care, …

The Regulation Of Human Iron Metabolism In Hypoxia, Andrew Govus

Theses: Doctorates and Masters

Athletes commonly use altitude exposure in an attempt to improve their aerobic performance at sea level. Altitude exposure enhances erythropoiesis and iron-dependent oxidative and glycolytic enzyme production, for this reason, athletes must maintain a healthy iron balance at altitude. A negative iron balance at altitude may limit such physiological adaptations, potentially reducing the performance benefits of altitude exposure.

This thesis examined the regulation of iron metabolism during acute (~31 min, Study One) and prolonged altitude exposure (14 days, Study Two). Finally, Study Three examined how daily oral iron supplementation influenced haemoglobin mass (Hbmass) and iron parameter responses to prolonged, moderate …

Training Load Quantification In Professional Australian Basketball And The Use Of The Reactive Strength Index As A Monitoring Tool, William Markwick

Theses: Doctorates and Masters

Study 1: The intraday reliability of the reactive strength index (RSI) calculated from a drop jump in professional men’s basketball.

Purpose: To evaluate the reliability of the reactive strength index (RSI) and jump height (JH) performance from multiple drop heights with elite basketball players. Methods: Thirteen professional basketball players (mean ±SD: age 25.8 ± 3.5 y, height 1.96 ± 0.07 m, mass 94.8 ± 8.2 kg) completed 3 maximal drop jump attempts on to a jump mat at 4 randomly assigned box heights and 3 counter movement jump (CMJ) trials. Results: No statistical difference was observed between …

Living After Confronting Death; Story Telling During The Recovery Trajectory Of Intensive Care Unit Survivors: An Interpretive Biographical Approach, Beverley Anne Ewens

Theses: Doctorates and Masters

Aim: To create new meaning of the experiences of intensive care survivors during early recovery and the meaning of “self” during this time. To add to the understanding of how support should be focussed for survivors during recovery.

Background: Survival from a critical event/illness and intensive care unit experience is increasing, as is associated physical and psychological complications. Complications are due to the severity of illness, the intensive care experience itself and the nature of the treatments which promote survival. If complications remain untreated increased health care service uptake and reduced quality of life can ensue. Despite the …

Antenatal Clinic: Using Ethnographic Methods To Listen To The Voices Of Pregnant Adolescents, Deborah Ireson

Theses: Doctorates and Masters

Aim: This research aims to explore the motivating reasons and external influences that affect pregnant adolescents’ reasons for attending an antenatal clinic. Background: Pregnancy during adolescence has been researched from perceived ‘poor’ decision making during pregnancy and postnatal perspectives involving high-risk outcomes for mother and baby. Antenatal clinic attendance by pregnant adolescents is often characterised by late and infrequent attendance, limiting midwifery contact with this inexperienced group. Gaps in the literature exist where the real-time voices of pregnant adolescents offer their current experiences of antenatal clinic as a relevant means to inform midwifery practice.

Research design: Using ethnographic methods, this …

Heat Stress: A Risk Factor For Skin Carcinogenesis, Leslie Calapre

Theses: Doctorates and Masters

BACKGROUND: The incidence of skin cancer in Australia has increased rapidly in the last few decades. Ultraviolet radiation (UV) is a major risk factor for skin carcinogenesis. UV, particularly the UVB spectrum, causes formation of cyclobutane pyrimidine dimers (CPD) in cellular DNA. Persistent and incorrectly repaired CPDs lead to DNA mutations and consequently, formation of cutaneous lesions. Interestingly, recent epidemiological studies have shown a significant increase in skin cancer incidence in geographical locations with high environmental temperatures. Thus, heat stress may potentiate the effects of UV exposure and act as an additional risk factor for skin cancer. Previous studies …

Analysis Of Road Sprint Cycling Performance, Paolo Menaspa

Theses: Doctorates and Masters

Sprint cycling ability is a key determinant of road cycling performance, with many races designed specifically for sprinters. The ability to excel in the final sprint is relevant for both individual riders and teams. Despite the importance of sprints within professional road cycling, the characteristics of professional road sprints and sprinters have yet to be extensively described. Thus, the overall objective of the five research studies contained within this doctoral thesis was to describe road cycling sprint performance and improve the general understanding of the physical, technical and tactical factors associated with such performances.

The first two descriptive field studies …

The Clinical Utility Of Multidisciplinary Rehabilitation In Individuals With Huntington’S Disease, Travis Miles Cruickshank

Theses: Doctorates and Masters

Background

Huntington’s disease (HD) is a chronic neurodegenerative disorder characterised by a progressive loss of cognitive function, motor control and psychiatric features. Individuals also display a variety of systemic features. Progressive neuronal dysfunction and neuronal cell death are thought to underlie the onset and progression of many clinical features of HD.

Despite scientific progress, there is still no cure or disease modifying therapy for HD, and available pharmaceutical agents only provide partial relief of motor and psychiatric features. An emerging body of evidence indicates that lifestyle enrichment may delay the onset and progression of clinical features, and exert favourable effects …

Bone Strength, Load Tolerance And Injury Risk In Elite Australian Football, Nicolas H. Hart

Theses: Doctorates and Masters

A paucity of research exists to characterise and investigate lower-body musculoskeletal characteristics and morphological adaptations in elite Australian Footballers with the aim to improve screening, monitoring and load management practices. Given the high prevalence of lower-body skeletal injuries in Australian Football; and the ability to measure, modify and train muscle and bone strength and their derivatives; this project served to extend scientific understanding of musculoskeletal morphology and bone strength characteristics in elite level field-based team sport athletes through a series of research studies using Dual-energy X-ray Absorptiometry (DXA) and peripheral Quantitative Computed Tomography (pQCT). In particular, studies one and two …

Perceived Harms And Benefits Of Parental Cannabis Use, And Parents’ Reports Regarding Harm-Reduction Strategies, Kathleen J. Donoghue

Theses: Doctorates and Masters

This research focussed on families in which at least one parent was a long-term cannabis user; I explored family members’ perceptions of the benefits and harms of cannabis use and the strategies parents used to minimise cannabis-related harm to themselves and their children. In depth, semi-structured interviews were undertaken with 43 individuals from 13 families, producing a series of family case studies that enabled examination of multiple perspectives within each family. In Study 1, I used an interpretive framework guided by Miles and Huberman’s (1994) thematic content analysis technique to analyse interview data, while study 2 yielded detailed descriptive vignettes …

Medical Cannabis In The United States: Policy, Politics And Science, Jelica Grbic

Theses: Doctorates and Masters

Historically, cannabis has been used as a pharmaceutical drug for a variety of conditions including rheumatism, depression, convulsions, and malaria. Since the 1970s, randomised, controlled clinical trials have shown cannabis to be effective in the treatment of debilitating medical conditions including nausea and vomiting resulting from cancer chemotherapy, wasting syndrome associated with HIV/AIDS, and chronic pain. Despite scientific evidence, as of 2011, when the material for this thesis was collected, only 17 states of the United States (U.S.) and the District of Columbia had enacted medical cannabis laws allowing patients with specific medical conditions to use cannabis without being criminally …

Evaluation Of A Modified Food Frequency Questionnaire To Measure Lignans In Australian Men And Women, Ying Qi Winnie Li

Theses: Doctorates and Masters

Phytoestrogens are plant compounds that possess estrogenic and biological properties that have been postulated to protect against chronic diseases. Isoflavonoids and lignans are two main classes of phytoestrogen that have been investigated for their estrogenic efficacy and occurrence in the human diet. Isoflavonoids are found in soy and related products, whereas lignans are found in a wider range of plant-based foods, such as cereals, vegetables, fruits, legumes, nuts and seeds; and in beverages such as tea, coffee and wine. In Western populations with low dietary intake of soy products, compared to the Asian counterparts, lignans could be a more important …

Alexithymia In A Psychiatric Population: Stability And Relationship With Therapeutic Outcome, Lauren Mcgillivray

Theses: Doctorates and Masters

Alexithymia has been defined as a personality construct that involves difficulties identifying and describing feelings, as well as an externally oriented thinking style and impoverished fantasy life, which places individuals at risk for various psychopathologies. For psychiatric populations, it represents an obstacle to therapeutic success. Despite extensive research, there is no consensus on the prevalence rate of alexithymia in the general psychiatric population and no data on alexithymia prevalence in the Australian general psychiatric population. In addition, there is inconsistency in the literature regarding the role of alexithymia in therapeutic intervention and a lack of robust studies involving control or …

Investigation Of Interferences And Development Of Pre-Treatment Methods For Arsenic Analysis By Anodic Stripping Voltammetry, Paul Lewtas

Theses: Doctorates and Masters

Contamination of drinking water is a serious health issue in many developing countries and there is a recognised need for low cost portable systems that are capable of analysing drinking water down to low ppb levels. Anodic Stripping Voltammetry (ASV) instruments meet these requirements but suffer interferences from other species which may also be present in the sample, particularly organics, other metals and sulfides. The last of these has received surprisingly little attention in the literature, despite being a proven interferent.

This study investigates the impact of each of these interference types, as well as a number of traditional and …

The N-Glycosylation Of Immunoglobulin G As A Novel Biomarker Of Parkinson’S Disease, Alyce Christine Russell

Theses: Doctorates and Masters

For neurodegenerative diseases, interventions during the early stages of the disease, before significant neurodegeneration has occurred, are associated with an increased probability of slowing or halting the disease process. In order to intervene early, it is essential that an accurate diagnosis is obtained and that disease progression can be monitored. This is particularly relevant for Parkinson’s disease (PD; International Classification of Diseases version 10) because significant neurodegeneration has already occurred by the time the clinical motor symptoms are present. Therefore, the development of translatable, high-throughput biomarkers for large scale population screening is a crucial area of research. Of promise are …

Investigating The Value Of Workplace-Endorsed Social Media For Improving Deskbound Employee Physical Activity Program Engagement And Reducing Sedentary Behaviour Health Risks, Darren Leigh Webb

Theses: Doctorates and Masters

Sedentary (prolonged sitting) behaviour is now recognised as an independent health risk factor contributing to a number of preventable lifestyle related diseases (Katzmarzyk, Church, Craig, & Bouchard, 2009). The widespread integration of computers into the office environment has seen an increase in employee work time participating in technology facilitated desk-based tasks requiring them to remain physically inactive (Philipson & Posner, 2003). According to recent research, workplace sedentary behavioural practices have objectively been measured as accounting for 81.8% of employee time, with a further 15.3% categorised as light activity within office based populations (Parry & Straker, 2013). With a recorded national …

An Appraisal Of Experiences Of Climate Change And Adaptive Response To Heat Stress By Farmers In Rural Ghana, Kwasi Frimpong

Theses: Doctorates and Masters

With the increase in average global temperatures, heat-related illnesses and deaths have unfolded as occupational and health issues. Periods of high to extreme temperatures are becoming more common and are a leading cause of weather-related deaths in many countries. In agricultural settings of African countries, heat stress is a major concern as many smallholder farmers work outdoors with limited access to cooling systems even in their resting and living environments. This study, conducted in the Bawku East part of Northern-East Ghana in 2013, examines, in the context of climate change, the trends and impacts of heat stress on smallholder farmers, …

What We Know, What We Do And What We Could Do: Creating An Understanding Of The Delivery Of Health Education In Lower Secondary Government Schools In Western Australia, Donna Michelle Barwood

Theses: Doctorates and Masters

Australian health data indicates that childhood is a significant time for young Australians to develop health and well-being issues. Concurrently, health advocates herald in-school delivery of skills-based participatory health education as making significant contributions to developing behaviour change and supporting health enhancing dispositions in children and young people. In Western Australia (WA), skillsbased participatory health education is characterised by linking knowledge and understandings of what it means to be safer, healthier and more physically active to skills that action these states. Skills-based is a preferred approach to teaching and learning in the Health and Physical Education Learning Area (HPE LA), …

Influence Of Anthropometric And Upper Body Strength Qualities On Surfboard Paddling Kinematics, Joseph Coyne

Theses: Doctorates and Masters

Competitive surfing is an international professional water sport of which a key factor in performance appears to be surfboard paddling ability. Research on surfing performance is relatively novel and there is very limited data as to how anthropometric and upper extremity strength variables influence not just surfboard paddling but also surfing ability.

PURPOSE: The purpose of this research was threefold. The first purpose was to evaluate the reliability of Pull Up and Dip 1RM strength assessments, the ratio between the two exercises, and a surfboard endurance paddle assessment. The second purpose was to establish if there were discriminative factors between …

Evaluation And Training Of Sensorimotor Abilities In Competitive Surfers, Tai T. Tran

Theses: Doctorates and Masters

Study 1: Development of a comprehensive performance testing protocol for competitive surfers

Purpose: Appropriate and valid testing protocols for evaluating the physical performances of surfing athletes is not well refined. The purpose of this project was to develop, refine, and evaluate a testing protocol for use with elite surfers, including measures of anthropometry, strength and power, and endurance. Methods: After pilot testing and consultation with athletes, coaches and sport scientists, a specific suite of tests was developed. Forty-four competitive junior surfers (16.2±1.3 years, 166.3±7.3 cm, 57.9±8.5 kg) participated in this study involving a within-day repeated measures analysis, using an Elite …

What Significance Does Physical Activity And Sedentary Behaviour Have For Members Of Online Health Promoting Communities? Learning From Austraiia’S Heartnet Community, Gloria Askander

Theses: Doctorates and Masters

My study used the HeartNET (HN) community to investigate the significance of physical activity and sedentary behaviour for members of online health-promoting communities by using online surveys and netnography. It found concerns about heart health and general health can be both a barrier and an enabler to increasing physical activity or reducing sedentary behaviour.

Gentle efforts to address sedentary behaviour could build confidence to increase physical activity. By offering role models and encouraging friendly rivalry, peer support via an online community (or other type of social networking sites) can increase physical activity and reduce sedentary behaviour. Fun, laughter and peer …

Duet For Life: Is Alexithymia A Key Note In Couples’ Empathy, Emotional Connection, Relationship Dissatisfaction, And Therapy Outcomes?, Pamela D. Mcneill

Theses: Doctorates and Masters

Alexithymia is an emotion-related construct involving difficulties identifying, describing, and processing emotion, which hinder the capacity to provide empathy, and the development of emotionally connected intimate relationships. To date, there has been minimal investigation of the impact of alexithymia on community couples’ relationships, no associated examination of clinical couples, and no consideration of therapists’ knowledge of alexithymia as a source of influence in couple therapy outcomes.

Studies 1 and 2 investigated alexithymia in 170 community couples and 17 therapy couples, respectively, in association with their empathy provided, empathy received, emotional connection components (i.e., turn toward, turn away, turn against, positive …

Just A “Click” Away From Evidence-Based Online Breast Cancer Information, Advice And Support Provided By A Specialist Nurse: An Ethnonetnographic Study, Cynthia Ann Witney

Theses: Doctorates and Masters

Breast cancer has had, and will continue to have, a devastating impact on the lives of many Australian women, their families, friends and the wider community. The concomitant treatment of this disease places a considerable burden on the health care system and the supporters of the person diagnosed with this disease. While there are many government and non-government organisations that provide treatment and support services for the person with breast cancer, these services are usually provided in person either in the home or at the organisation’s offices. This study extended the information advice and support aspects of these services to …

Saying ‘No’: A Biographical Analysis Of The Experiences Of Women With A Genetic Predisposition To Developing Breast/Ovarian Cancer Who Reject Risk Reducing Surgery, Doreen Molloy

Theses: Doctorates and Masters

Background: Genetic technologies have identified some of the genes implicated in cancer susceptibility. Women with mutations in breast/ovarian cancer-susceptibility genes (BRCA1 and 2) have a lifetime combined risk of breast/ovarian cancer of more than 80%. Risk reducing surgery (RRS) reduces cancer risk by as much as 90% in high risk populations. Despite this, some BRCA1/2 mutation-positive women say no to RRS.

Purpose: To illuminate an understanding of why women at high risk of developing breast/ovarian cancer say no to risk reducing surgery (RRS).

Design: Denzin’s (1989) interpretive biography was combined with Dolby-Stahl’s (1985) literary folkloristic methodology to provide a contextualised …

Landing Performance And Lower Extremity Injuries In Competitive Surfing, Lina Elizabeth Lundgren

Theses: Doctorates and Masters

Competitive surfing involves highXrisk manoeuvres that may impose injury risk, especially in the lower extremity. Although the dynamic environment of surfing is a major factor of unpredictable determinants for injury risk, there may be athlete qualities with importance for prevention. Previous studies suggest that dynamic loading and landing tasks represent major risk factors, and should therefore be included in athlete assessments and risk analysis.

The purpose of this thesis was to investigate landing tasks that may be related to surfing performance and injury risk. It involved studying manoeuvres and landing tasks to establish its relevance for surfing athletes, develop multifactorial …