Sports Sciences Commons^™

Quantifying And Comparing The Head Impact Biomechanics Of Different Player Positions For Canadian University Football, Kody Campbell

Electronic Thesis and Dissertation Repository

Differences between Canadian and American football could affect the magnitudes of head impacts and risk of concussion to Canadian players. This study sought to quantify and compare the number, magnitude, and location of impacts that Canadian University football players of different positions experienced during games and practice in a season. A kinematic measuring device collected the linear accelerations and rotational velocities of the head from impacts experienced by players competing in practices and games. The impact magnitudes that were experienced in games were significantly larger than in practice. The offensive back position and wide receiver position had significantly larger peak …

Unveiling The 'Olympic Kidnapping Act': Examining Public Policy And Homelessness In The 2010 Vancouver Olympic Games, Sophy Chan

Electronic Thesis and Dissertation Repository

This thesis examines how the 2010 Olympic Games contributed to the issue of homelessness in Vancouver. Specifically, this thesis: 1) investigates how local and provincial ordinances were exploited by landlords to displace tenants and used to mobilize spaces for Olympic consumption so that unwanted behaviours related to homelessness were criminalized, and 2) documents and analyzes the arguments put forward by advocacy groups that contested what was happening to low-income and homeless residents because of Olympic development. Throughout, I argue that homelessness was exacerbated in the lead-up to the Olympic Games in two ways. First, landlords and building owners who wanted …

Quantifying The Effect Of Age And Contraction Mode On The Force-Velocity-Power Relationship In The Knee Extensors, Justin R. Paturel

Electronic Thesis and Dissertation Repository

PURPOSE: To assess and compare the force-velocity-power relationship (F-V-P) using isotonic and isokinetic knee extensions in 11 younger (19-30y) and 11 older (69-81y) men. METHODS: The construction of the F-V-P curves were attained with each participant performing maximal, explosive knee extensions at 8 different loads (isotonic) and 8 different velocities (isokinetic) on a Cybex HUMAC NORM dynamometer. Maximal voluntary contraction (MVC or P_o), maximal shortening velocity (V_max), maximum power, optimal torque (P_opt) and velocity (V_opt) were assessed and compared. RESULTS: The older men were 43% weaker, 18% slower and ~54% less powerful …

The Nature Of Conflict In Sport: Development And Validation Of The Group Conflict Questionnaire, Kyle F. Paradis

Electronic Thesis and Dissertation Repository

The purpose of the present dissertation was to develop a questionnaire to assess intra-group conflict in sport teams. To this end, the current dissertation consisted of three phases which followed a logical progression that is typical in the questionnaire development process. A total of (N = 752) participants took part in the three phases (Phase 1: N = 10; Phase 2: N = 437; Phase 3: N = 305).

Phase 1 was a qualitative investigation of athletes’ (N = 10) perceptions of the nature of conflict in sport. This phase was undertaken to gain a better understanding of the conflict …

The Effect Of Pacing Strategies On Oxygen Kinetics And Muscle Hemoglobin Status And Energy System Contribution In A 6 Min Exercise Performance, John D. Murray

Electronic Thesis and Dissertation Repository

ABSTRACT

The purpose of this study was to compare the effects of two different pacing strategies during a 6 min exercise performance on average power output, VO₂ kinetics, deoxygenation in the vastus lateralis muscle, energy system contribution, average power output and blood lactate concentration. Eight young, healthy, male subjects (age 24 ± 3) completed two 6 min pacing strategies on a cycle ergometer; one bout was paced at a calculated fatigue threshold (FT) and the other began with a 12 s sprint and was paced 5 % below FT pace (5%2, work rate, anaerobic energy system contribution and energy …

Short Term Sensory And Vascular Responses To Physical Agent Modalities And Exercise In Healthy Volunteers And Patients With Distal Radius Fracture., Shaguftha Shaik

Electronic Thesis and Dissertation Repository

Currently, there is weak evidence on the effectiveness of different rehabilitation regimens following distal radius fracture (DRF). This thesis evaluated sensory and vascular effects of exercise, thermal and ultrasound interventions that can be used in the mobilization phase (cast removal) after DRF.

Methods

• This thesis includes 3 studies. The first study compared responses to Immersion in Cold water Evaluation (ICE) in the DRF and uninjured hands. Skin blood flow (Sbf), skin temperature (temp.) and sensory perception thresholds (sPT) at 2000Hz for A –beta fibres and at 5 Hz for C fibres were obtained before, immediately after ICE and 10 min …

The Effects Of Acute High- And Low-Intensity Exercise On Hsp70 And Hsp90 Accumulation In Rat Skeletal Myofibres And Vasculature, Hana Kowalchuk

Electronic Thesis and Dissertation Repository

Exercise induces cytoprotective stress proteins in blood vessels (BV) and skeletal myofibres. The localization and extent of induction with different exercise intensities is unclear. Rats (n=10 per group) were run at high (HIEX; 30m/min) versus low-intensity exercise (LOEX; 15m/min) for 1hr, sacrificed 24hr later. Sections of the white portion of the vastus were immunofluorescently stained for Hsp70 and Hsp90. It was hypothesized that: 1) a greater abundance of Hsp70 and Hsp90 would be observed in BVs following HIEX, 2) due to earlier recruitment, larger BVs would have a more robust response than small BVs, 3) more myofibres surrounding BVs expressing …

A Randomized Controlled Trial Comparing Arthroscopic Surgery To Conservative Management Of Femoroacetabular Impingement, Heather C. Klaus

Electronic Thesis and Dissertation Repository

OBJECTIVE: To determine whether patients with femoroacetabular impingement (FAI) who undergo arthroscopic hip surgery experience similar outcomes at two years post-operative with respect to physical function, pain, and health related quality of life, compared to similar patients who receive conservative management, including medication and physiotherapy. This thesis is an interim analysis of ten participants who are six-months post-randomization. METHODS: Participants were randomized to either operative treatment (6) or conservative treatment (4), and completed general and region specific quality of life questionnaires, including the Hip Outcome Score (HOS), Lower Extremity Functional Scale (LEFS), Modified Harris Hip Score (MHHS), Non-Arthritic Hip Score …

Effect Of Congenital Versus Acquired Varus On Patient-Reported Outcomes After High Tibial Osteotomy, Sherelle T. Solomon

Electronic Thesis and Dissertation Repository

ABSTRACT

Objectives: 1) To determine the inter-rater reliability of tibial bone varus angle (TBVA) measurements. 2) To compare patient-reported outcomes after medial opening wedge high tibial osteotomy (HTO) in patients with congenital versus acquired varus.

Methods: Two raters measured TBVA from preoperative whole-limb standing anteroposterior radiographs (n=74). Patients completed Knee Osteoarthritis Outcome Scores (KOOS) before and 5 years after surgery. The sample was first divided into two groups based on preoperative congenital (TBVA>5°) or acquired (TBVA≤5°) varus, then three groups based on tertiles for TBVA.

Results: Intraclass correlation coefficients (ICC) suggested excellent inter-rater reliability (ICC2,1=0.78; ICC2,2=0.88). Repeated measures analysis …

Prolonged Treadmill Walking In Healthy Participants With And Without The Use Of Foot Orthoses To Support The Medial Longitudinal Arch, Daisy K. Ng

Electronic Thesis and Dissertation Repository

In the research setting, instrumented treadmills are often used to study prolonged periods of walking. This thesis examines the effects of in-shoe foot orthoses on walking gait during prolonged periods of treadmill walking. The two types of foot orthoses investigated were: 1) a pedorthist hand-made orthotic with medial longitudinal arch (MLA) support and 2) a proprioceptive feedback-type orthotic designed to stimulate the intrinsic foot muscles of the MLA. The three kinematic variables observed over 60 minutes of intermittent treadmill walking were toe-out angle in the transverse plane, pelvic tilt angle in the sagittal plane, and trunk lean angle in the …

Assessing Long-Term Outcomes In Individuals Undergoing Fasciotomy For Chronic Exertional Compartment Syndrome Of The Lower Leg, Nick Pasic

Electronic Thesis and Dissertation Repository

This study was a case series of 46 patients (mean age 30 years (SD ± 13.0) who underwent fasciotomy for treatment of chronic exertional compartment syndrome (CECS). We prospectively collected long-term patient-reported functional outcome using the Lower Extremity Functional Scale (LEFS) and used existing pre-operative intracompartmental pressure testing data prior to and following exercise to determine the association between the LEFS and pre-operative pressure measurements At the time of follow-up, patients completed one LEFS questionnaire to assess their current health status, another to query their status at the time of best outcome, as well as a return-to-sport/satisfaction questionnaire.

In our …

Identifying Gait Abnormalities In Patients With Femoroacetabular Impingement Syndrome, Brook A. Russell

Electronic Thesis and Dissertation Repository

OBJECTIVE: To determine the biomechanical gait characteristics and quality of life of adults with femoroacetabular impingement (FAI) and how their gait compares to the gait of healthy controls. METHODS: Gait analyses were performed on 18 participants (9 FAI, 9 control) while walking barefoot in the Wolf Orthopeadic Biomechanics Lab. In addition, FAI participants completed general and region specific quality of life questionnaires. RESULTS: Hip moment (5.2%BW*ht vs. 4.96%BW*ht), toe out angle (12.36 ° vs. 8.15°), and lateral (3.55° vs. 2.18°) and forward (4.34° vs. 3.93°) pelvic tilt were not statistically different between groups. Trunk lean (1.33° vs. 0.36°), hip flexion …

Exploring Exercise And Youth With A Disability, Kimberly B. Simpson

Electronic Thesis and Dissertation Repository

The purpose of this dissertation was to explore the exercise participation of youth with a disability. The studies are grounded in self-determination theory (SDT) (Deci & Ryan, 1985) and follow the General Model of Program planning (GMPP). The first study in this dissertation involved assessment interviews to explore exercise and youth with a disability. In the assessment interviews (Study 1), youth highlighted their desire for physical activity opportunities that promoted their independence, socializing with peers, and success in reaching fitness goals in a community based setting. The interviews with youth matched the central tenants of SDT that being: autonomy, relatedness …

Certified Professional Co-Active Coaches: Why They Enjoy Coaching, Courtney Newnham-Kanas, Don Morrow, Jennifer D. Irwin

Health Studies Publications

The evidence-base for the practice of coaching continues to flourish, despite the fact that very little is known about the practitioners (i.e. the coaches) themselves. It is of value to understand how coaches perceive their practice. Such information can be utilized to create a common knowledge-base about coaches that can be used, in turn, to track trends and forward research that evaluates coaching services. As the use of Co-Active coaching in facilitating behaviour change continues to rise it becomes important to learn more about Certified-Professional Co-Active Coaches (CPCC). Therefore, the purpose of this study is to evaluate what CPCCs enjoy …

Physical Activity Of Remote Indigenous Australian Women: A Postcolonial Analysis Of Lifestyle, Doug Macdonald, Rebecca Abbott, David Jenkins

Aboriginal Policy Research Consortium International (APRCi)

In the context of rising chronic diseases amongst Indigenous peoples, there are calls for the adoption of more healthy “lifestyles.” In this context, this paper explores thoughts about physical activity from 21 Indigenous families through the voices of women and girls living in remote rural communities in the Torres Strait and Northern Peninsula Area, Australia. Speaking back to physical activity as a lifestyle “choice,” three consistent themes emerged: shame, gendered positioning, and welfarism. In conclusion, the perspectives of Torres Strait islanders and Northern Peninsula Area communities suggest that there are deeply embedded ways of thinking about the body, familial obligations, …

Physical Activity And Screen Time Behaviour In Metropolitan, Regional And Rural Adolescents: A Cross-Sectional Study Of Australians Aged 9–16 Years, James Dollman, Carol Maher, Tim S. Olds, Kate Ridley

Aboriginal Policy Research Consortium International (APRCi)

Objectives: While there is consistent evidence that rural adults in Australia are less active than their urban counterparts, studies relating geographical remoteness to activity patterns in Australian adolescents have yielded inconsistent results. The aim of this study was to describe objectively and subjectively measured patterns of physical activity and sedentary behaviours across remoteness categories in a representative sample of 9–16 year old Australians. Design: Cross-sectional observational study. Methods: 2071 Australian adolescents provided self-report use of time data on four days and wore a pedometer for at least 6 days within the 2007 Australian National Children’s Nutrition and Physical Activity Survey. …

Addressing Alcohol Use In Community Sports Clubs: Attitudes Of Club Representatives, Luke Wolfenden, Melanie Kingsland, Bosco Rowland, Vanessa Kennedy, John Wiggers

Aboriginal Policy Research Consortium International (APRCi)

No abstract provided.

Development Of A Cohesion Inventory For Children's Sport Teams, Luc J. Martin

Electronic Thesis and Dissertation Repository

The general purpose of this dissertation was to develop an inventory designed to measure cohesion in children’s (ages 9-12) sport teams. To this end, three studies were conducted. In Study 1, children became active agents in the process of test construction. More specifically, children (N = 167) participated in focus groups and completed open-ended questionnaires in order to provide information on their perceptions of cohesion as well as motives for participating, continuing, and ceasing involvement on sport teams. Study 2 involved the use of the information obtained from Study 1 to develop potential items for the questionnaire. In addition, the …