Evaluation Of Conservative And Operative Treatments In Active Patients With Acromioclavicular (Ac) And Rotator Cuff (Rc) Injuries, Jesse Singh

Electronic Thesis and Dissertation Repository

Abstract

Introduction: Shoulder pain and disability, particularly acromioclavicular joint (ACJ) and rotator cuff (RC) injuries, are common in a physically active population. Determining operative or rehabilitative treatment plans involve multiple treatment choices influenced by the injury grade and treatment goals, such as return to sport. This thesis investigates the management of treatment for AC and RC injuries

Method: The first study is a scoping review that uses the Preferred Reporting Items for Systematic Reviews and Meta-Analysis extension for Scoping Reviews (PRISMA-ScR) to synthesize 32 studies involving athletes who have undergone conservative or operative treatment for their Rockwood grade III …

The Influence Of Sex And Body Size On The Validity Of The Microsoft Kinect For Measuring Knee Motion During Landing, Jillian Neufeld

Electronic Thesis and Dissertation Repository

Measuring knee motion during landing is a method to evaluate knee injury risk. Three-dimensional (3D) motion capture is inaccessible, and the Microsoft Kinect is an alternative to measure knee motion. The primary objective was to evaluate the influence of sex and body size on the validity of the Kinect to measure knee motion during landing. A secondary objective was to compare knee motion between females and males with high and low body mass index (BMI). We assessed frontal plane knee kinematics of 40 (10 per group of females and males with high and low BMI) participants during landing with the …

A 10 S: 5 S High-Intensity Interval Training Regime Improves Rowing Performance In Varsity And International Class Rowers, Braden J. Reid

Electronic Thesis and Dissertation Repository

The purpose of this study was to investigate the effects of a high-intensity interval training regime with elite collegiate rowers on their rowing performance. A total of 10 interval training sessions were performed over a four-week period with four males and five females completing all pre-testing performance and training sessions. Participants completed a 2000 m performance test to determine initial training intensity. The interventional training sessions consisted of 30 min of 10 s work: 5 s recovery. The 10 s mean power output improved 17% from training session one to ten. The moderate-intensity increased by 44%; mean power output over …

Using Statistics, Computational Modelling And Artificial Intelligence Methods To Study And Strengthen The Link Between Kinematic Impacts And Mtbis, Andrew Luke Mcconnell Patterson

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Mild traumatic brain injuries (mTBIs) are frequently occurring, yet poorly understood, injuries in sports (e.g., ice hockey) and other physical recreation activities where head impacts occur. Helmets are essential pieces of equipment used to protect participants’ heads from mTBIs. Evaluating the performance of helmets to prevent mTBIs using simulations on anatomically accurate computational head finite element models is critically important for advancing the development of safer helmets. Advancing the level of detail in, and access to, such models, and their continued validation through state-of-the-art brain imaging methods and traditional head injury assessment procedures, is also essential to improve safety. The …

A Long-Term Follow-Up Of The Stability Study: Multicenter Rct Comparing Anterior Cruciate Ligament Reconstruction With And Without Lateral Extra-Articular Tenodesis In Individuals At High Risk Of Graft Failure, Katelyn M. Inch

Electronic Thesis and Dissertation Repository

One hundred and ninety-six patients at the Fowler Kennedy Sport Medicine Clinic (FKSMC) undergoing anterior cruciate ligament (ACL) reconstruction (ACLR) were randomized as part of the multi-center STABILITY study to receive either an isolated ACLR or ACLR with a lateral extra-articular tenodesis (LET). The STABILITY study followed these patients up to two years postoperative, and a long-term follow-up protocol was initiated afterwards. Eighty-two patients from this center were seen at three, five and seven years postoperative as part of a long-term follow-up. Our primary outcome was a composite outcome of instability and graft failure. Secondary outcomes included patient-reported outcome measures …

The Clinical Value Of Oculomotor Assessments Across The Continuum Of Concussion, Dillon Richards

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Concussions are complex conditions that are difficult to manage medically. Variations in symptom presentation, intricate neurophysiological processes, and the availability of a variety of possible assessment tools may contribute to this complexity. Clinicians must use a broad approach, employing both subjective symptom assessment and objective assessments to confirm a diagnosis and/or monitor progression and recovery. Oculomotor function after concussion may be an important indicator of injury, given the interconnectedness of oculomotor function, vestibulo-ocular and visual systems, and even cognition. Oculomotor function may be assessed objectively or indirectly using patient-reported symptom checklists as part of subjective assessments. One way of objectively …

Head’S Up! Examining The Relationship Between Field Of View And Head Position In Ice Hockey Players, Kristine E. Walker

Electronic Thesis and Dissertation Repository

Ice hockey is a dynamic, fast-paced game where players need to be aware of multiple factors, devoting appropriate attention to varying salient aspects to enhance performance. The term “keep your head up” is ubiquitous encouragement because if players do not, their visual field (what they can see) is compromised, performance (what they can do) decreases, and likelihood of injury increases. Head-down behaviour is problematic and is observed at all skill levels. Head position (HP) behaviour has not been quantified objectively in any sport. Through collaboration with an NHL player development coach, their practice-based knowledge and tacit experience informed the direction …

The Role Of Exogenous Ketones On Various Aspects Of Exercise Performance, Manuel D. Quinones

Electronic Thesis and Dissertation Repository

Routinely, athletes and coaches pursue novel nutritional strategies in an attempt to support exercise training techniques and/or enhance athletic performance. Body carbohydrate (CHO) stores are limited so strategies to enhance fat use and spare CHO during exercise and thus, attenuate the onset of fatigue are commonplace. It has been suggested that oral exogenous ketone administration is ergogenic not only by altering exercise metabolism (sparing CHO), but also by improving exercise cognitive function as well as enhancing post-exercise glycogen resynthesis. However, data supporting these claims are limited and contradictory. Therefore, the purpose of this dissertation was to explore the role of …

Femoroacetabular Impingement Syndrome: Evaluating Postoperative Rehabilitation Progress And Return To Sport Readiness, Trevor A. Day

Electronic Thesis and Dissertation Repository

Femoroacetabular impingement syndrome (FAIS) is a common cause of non-arthritic hip pain and reduced physical activity in active young adults. It is defined as a motion-related disorder of the hip with a triad of symptoms, clinical signs, and imaging findings that represents symptomatic premature contact between the proximal femur and the acetabulum. There are two anatomical morphologies that can cause FAIS, cam, and pincer, and is a challenging clinical pathology. Patients typically undergo hip arthroscopy to repair damage to the joint and recess the bone causing the impingement. These procedures can result in positive outcomes for the patient, like reduced …

Functional Performance Testing In Ice Hockey: The Role Of The Single Leg, Medial Countermovement Jump, Anthony S. Donskov

Electronic Thesis and Dissertation Repository

Due to the physical nature of the game, injuries are common in ice hockey. Injury rates have been difficult to interpret due to the inconsistencies in the definitions of injury and athlete exposure. Consensus statements on injury definitions have been developed for sports such as soccer and rugby but have not been established in ice hockey. Furthermore, many different off-ice tests are performed, but a hockey-specific performance test has not been promoted. Accordingly, the objective for this thesis was to investigate injury rates, injury definition, athlete exposure and injury type in men’s ice hockey, and providing information on a practical …

Effects Of Branched-Chain Amino Acid Supplementation On Exercise Induced Muscle Damage And Delayed Onset Of Muscle Soreness After A Bout Of Eccentric Exercise, Crystal Lee

Electronic Thesis and Dissertation Repository

Branched-chain amino acids (BCAA) have the potential to reduce both exercise-induced muscle damage (EIMD) and delayed onset of muscle soreness (DOMS) after a bout of eccentric contractions (ECC). The purpose of this study was to determine the effects of BCAA supplementation for 12 days prior to and for an additional 7 days following a bout of ECC on EIMD and DOMS. Sixteen women with no prior experience with strength training were assigned randomly to a BCAA group or a placebo group. Only four participants completed the trial due to COVID-19 (another completed 72h of recovery and was included). Participants supplemented …

Perspectives Of Canadian University Coaches On Integrating Sport Psychology And Mental Performance Consultants In Varsity Programs, Federico Cisneros Sánchez

Electronic Thesis and Dissertation Repository

Recently, sport psychology has become a more popular resource for athletes and coaches when looking to increase performance. It is unknown how many Canadian universities utilize sport psychology services in their athletic programs. Semi-structured interviews were conducted with coaches of Canadian university varsity teams to learn about their opinions on sport psychology and mental performance consultants (MPCs). The research was approached from a pragmatic perspective. Results showed that MPCs are important to enhance performance and provide mental health resources. MPCs provide athletes with personal and leadership development, mental skills training, and mental health support. MPCs can also be a resource …

Assessment Of Landing Biomechanics And Rehabilitation After Anterior Cruciate Ligament Reconstruction, Sheila S. Gagnon

Electronic Thesis and Dissertation Repository

Aberrant landing biomechanics increase the risk of anterior cruciate ligament (ACL) injury and are a focus of rehabilitation after ACL reconstruction. The purpose of the present thesis was to develop and evaluate methods of assessing landing mechanics and investigate the effects of different rehabilitation strategies after ACL reconstruction. Three studies were conducted. The first study used a Delphi process to develop the content of a Clinician-Rated Drop Vertical Jump Scale to evaluate jump landing mechanics during rehabilitation after ACL reconstruction. Twenty experts participated in four rounds of questioning, resulting in 92% agreement for knee valgus collapse, lateral trunk lean, insufficient …

The Effect Of Pacing Strategy On 2000 M Rowing Ergometer Performance In Well-Trained Male And Female Rowers, Ryan A. Clegg

Electronic Thesis and Dissertation Repository

The purpose of this study was to determine whether an Even pacing strategy would be more optimal than the traditional fast-starting parabolic strategy in a 2000 m rowing race.  13 collegiate level rowers completed two 2000 m pacing strategies; one Evenly paced, and the other a traditional On Water strategy.  Neither pacing strategy demonstrated differences in performance.  This finding was consistent across sexes and experience levels.  Males demonstrated significant correlations with an Even pacing strategy and 6000 m performance (EP p=0.001).  Females showed significant correlation between both strategies and 6000 m performance, plus peak power and the On Water strategy …

Psychological Predictors Of Injury In Collegiate Cheerleaders, Alexander Marchand

Electronic Thesis and Dissertation Repository

According to the revised stress-injury model (Williams & Andersen, 1998), greater life stress predicts greater vulnerability to athletic injury, with this relationship being strongest among athletes exhibiting competitive anxiety, less social support, and non-adaptive coping skills. This study tested the validity of this model among collegiate cheerleaders, an injury-prone athlete group. Ninety-two collegiate cheerleaders recorded instances of injury over 12 weeks. Measures of life stress, competitive anxiety, coping style, social support, and previous injury were obtained. Heightened negative life stress did not coincide with greater injury. A positive stress-injury relationship was observed among cheerleaders reporting high avoidance coping. A negative …

The Impact Of Partners In Doubles Racquet Sports And Interpersonal Emotional Regulation, Sarah J. Deck

Electronic Thesis and Dissertation Repository

The overall purpose of this dissertation was to understand the impact that partner play has in doubles racquet sports (tennis, badminton and squash) on emotions, coping and emotional regulation. Study 1 laid the groundwork to understanding the impact (positive or negative) that the different types of partner play (playing well, playing normal, or playing poorly) has in these dyads. Participants (N=103) were randomized into one of three scenarios (written vignettes) designed to manipulate partners play and asked to fill out a questionnaire packet based on the scenario read. Findings of Study 1 showed that there was a difference in the …

Cumulative Purposeful Soccer Heading Can Lead To Compensatory Changes In Brain Activity During Combined Moderate Exercise And Cognitive Load In Female Youth Soccer Players, Alexandra Harriss

Electronic Thesis and Dissertation Repository

Head trauma that occurs during sporting events is responsible for an increasing number of emergency department visits in Canada and is associated with an increased risk of developing neurodegenerative diseases.While head injury in American football has been extensively studied, it cannot be extrapolated to non-helmeted sports. Approximately 265 million people are actively participating in soccer and many are 18 years of age and younger. Soccer is unique in that players use their head to redirect the ball; however, the effects of cumulative purposeful soccer heading on brain health are unknown. Accordingly, the objective of this thesis was to quantify head …

The Effects Of Exercise On Cognition, Mobility, And Neuroimaging Outcomes In Older Adults Without Dementia, Narlon Cassio Boa Sorte Silva

Electronic Thesis and Dissertation Repository

Cognitive decline is increasing with the aging population and, at present, there is no effective pharmacologic treatment available. Exercise interventions may impart protection against cognitive decline. A novel exercise approach is multiple-modality exercise (MME; aerobic, resistance, and balance exercise) with mind-motor training. Mind-motor training is a promising intervention in the study of cognitive function. Combining MME with mind-motor training may improve or maintain cognition and provide prevention of dementia early in the course of cognitive decline. Individuals with subjective cognitive complaints (SCC) comprise an at-risk group early in the spectrum of cognitive decline that could be targeted for prevention. The …

Coaches Perceptions And Use Of An Online Sport Psychology Resource, Jade Farhat

Electronic Thesis and Dissertation Repository

Sport psychology has become widely applied in coaching practices to assist in athletic success. Despite the increased use, there is a lack of evidence-based sport psychology information available to coaches in the form of informal sources. The aim of this study was to explore coaches’ perceptions and use of a sport psychology website using mixed methods. Eight coaches participated in semi-structured interviews. A thematic analysis revealed five themes (current use, accessibility, attitudes, website use, website engagement). Google Analytics demonstrated coaches’ engagement with the website. Findings suggested that coaches perceive sport psychology to be relevant to their sport and the website …

Does An Acute Achilles Tendon Rupture Become A Patient's Achilles Heel In The Long-Term?, Michaela Cm Khan

Electronic Thesis and Dissertation Repository

It is unknown if deficits in the involved limb following acute Achilles tendon rupture (AATR) persist in the long-term, or differ between patients treated operatively or non-operatively. This study investigated 43 patients 15±1 years post-AATR from a previous randomized controlled trial (RCT) that compared operative and non-operative treatment. Structural characteristics in the Achilles tendon and surrounding musculature were assessed using magnetic resonance imaging. We also performed physical examinations and evaluated performance-based and patient-reported outcomes. Overall, there were substantial differences between the involved and uninvolved limbs in most outcomes. Some outcomes improved over time from the initial RCT to the final …

Evaluation Of The Psychometric And Measurement Properties Of The Scat5 And Child Scat5, Michael Robinson

Electronic Thesis and Dissertation Repository

Concussions are one of the most complex conditions to manage in sport medicine due to the individualized clinical presentation caused by the complex neurometabolic cascade that occurs. The identification, assessment and management of concussion requires clinicians to employ a multifaceted approach including the subjective disclosure of symptoms by patents. In order to aid in this, symptom checklists are commonly used as they provide a standardized method for collecting the severity of concussion symptoms. One of the most common symptom checklists is the 5^th Sport Concussion Assessment Tool (SCAT5) symptom evaluation which is available in an adult and pediatric version. …

Biofeedback Use In Sport, Kendra Nelson Ferguson

Electronic Thesis and Dissertation Repository

The general purpose of this dissertation was to examine the effects of biofeedback training on sport performance. This dissertation was divided into three studies. Study 1 qualitatively explored athletes’ perspectives of biofeedback post-intervention. Five varsity athletes were provided with a five-session biofeedback intervention training respiration rate, heart rate variability, and skin conductance. Following the intervention, an interview was conducted. Athletes perceived biofeedback to enhance self-regulation skills both in sport and academics, contributing to perceptions of superior performance.

To further examine perspectives of biofeedback training, Study 2 qualitatively explored mental performance consultants’ use of biofeedback and their perceptions of the tool. …

Performance Impact Of Different Lower-Limb Setup Positions In The Backstroke Swimming Start, Gordon E. Barkwell

Electronic Thesis and Dissertation Repository

The performance impact of different knee extension angles in the setup position for a backstroke start was evaluated using an instrumented starting surface. Ten backstroke swimmers completed maximum-effort starts in each of two setup positions: one with the knees flexed, and one with the knees extended. The start handles and touchpad were instrumented with tri-axial force plates. Activity of major hip and knee extensors was measured using surface electromyography. Body position was recorded throughout the start using two high-speed cameras. There was no difference in time to 10 m between the two conditions, indicating there is likely no advantage in …

Performing 30 Second Weight Training Bouts For Five Weeks Decreases 2000 M Ergometer Times In Collegiate Rowers, Andre Beven Pelletier

Electronic Thesis and Dissertation Repository

This study investigated the effects of performing 30 second weight training bouts (30 s) on peak aerobic power, 2000 m time and peak and mean 1 min power output, compared to those of a low repetition strength training program (LoRep), in pre-conditioned well-trained male and female collegiate rowers while concurrently performing a high volume of endurance training over an identical five week period. The 30 s group mean 2000 m time was significantly reduced pre-to-post training by 1.0% (±1.3) (30 s: pre = 6:45.3 (±35.3), post = 6:41.2 (±32.7), P ≤ 0.05) while LoRep group mean 2000 m time was …

Power Reserve Following Ramp-Incremental Cycling To Exhaustion: Implications For Muscle Fatigue And Function, Michael D. Hodgson

Electronic Thesis and Dissertation Repository

In ramp-incremental cycling exercise, some individuals are capable of producing power output (PO) in excess of that produced at their limit of tolerance (LoT) while others cannot. This study sought to describe the: 1) prevalence of a “power reserve” within a group of young men (n=21; mean ± SD: age 25±4 years; V̇O_2max45±8 ml•kg^-1•min^-1); and 2) muscle fatigue characteristics of those with and without a power reserve. Power reserve was determined as the difference between peak PO achieved during a ramp-incremental test to exhaustion and maximal, single-leg isokinetic dynamometer power. Pre- versus post-exercise changes …

E-Visits For Early Post-Operative Visits Following Orthopaedic Surgery Can They Add Efficiency Without Sacrificing Effectiveness, William G. Jeffery

Electronic Thesis and Dissertation Repository

We asked 217 sport surgery and 135 total knee arthroplasty (TKA) patients to complete a questionnaire (e-Visit) before attending their two and six-week post-operative appointment. Our primary objective was to use the questions asked of patients prior to their appointment to develop a model that could be used as web-based e-Visit to predict early post-operative adverse events. Gold standard comparison was the surgeon’s opinion as to the presence or absence of an event at follow-up. Secondary objective was evaluation of a simplified model. We found good area under the curve (AUC) statistics (0.76 (95% CI 0.69 - 0.84) and 0.80 …

The Effects Of Moderate Intensity Strength Training Coupled With Blood Flow Restriction: A 12 Week Intervention, Kelly Barrett

Electronic Thesis and Dissertation Repository

Blood flow restriction training (BFRT) has been suggested to increase muscle size and strength in trained and untrained individuals when using light load intensities (30 percent 1-RM). However, there is little data to support its use when working with moderate load intensities, specifically, above 50 percent of an individual’s 1-RM. The purpose of this study was to evaluate the effects of moderate load intensity BFRT on muscle size and strength of the biceps brachii after a 12 week strength training intervention. Nine, previously strength trained, participants performed an elbow flexion exercise at 70 percent of their individualized 1-RM, twice per …

The Responses Of Vo2, Vco2, Substrate Utilization And Maximal Performance To Long Duration Exercise, Michael Bitel

Electronic Thesis and Dissertation Repository

Purpose: The purpose of this study was to compare and contrast the effects of a long duration exercise cycle (~3 h) by trained cyclists (RIDE) to a 3 h inactive period (SED) in recreationally active individuals (CONT) on VO2, VCO2, peak aerobic power, fat oxidation, anaerobic capacity (Wʹ), arterialised-capillary lactate concentration and maximal sustainable power (CP). Methods: Male cyclists (n=12) and male recreationally active individuals (n=7) performed both an incremental test to volitional fatigue (RAMP) and 3 min all-out tests on a cycle ergometer, pre- and post-RIDE/SED respectively. Results: Increased fat oxidation rates, and reductions in VO2peak, peak aerobic power …

The Neuroprotective Effects Of Endurance Training On The Aging Brain, Katelyn Norton

Electronic Thesis and Dissertation Repository

Dysregulation of autonomic control often develops with advancing age, favoring a chronic state of heightened sympathetic outflow with parasympathetic withdrawal. However, the mechanisms of this age-related autonomic impairment are not known and may relate to alterations in brain structure (e.g. cortical atrophy) and/or altered neural function, particularly in regions related to the cortical autonomic network, namely, the medial prefrontal cortex (MPFC), insula cortex (IC), and hippocampus (HC). Exercise exerts beneficial effects on brain structure and, in the case of cognition, neurologic function; however, how exercise affects regions of the brain related to autonomic function are not known. This thesis tested …

Effect Of Modified Corn Starch Ingestion On Soccer Skills And Physical/Cognitive Performance During A Simulated Soccer Game, Manuel D. Quinones

Electronic Thesis and Dissertation Repository

Abstract

Generation UCAN® (UCAN), which contains heat treated non Genetically Modified Organism (GMO) corn starch, has the potential to enhance endurance exercise performance via altering substrate use; however, whether its effects are similar during high intensity, intermittent exercise, like that performed in soccer is unknown. Therefore, the purpose of this study was to assess the effects of UCAN on physical, skill and cognitive performance during and following a simulated soccer game. Eleven trained male soccer players completed a 60-min soccer simulated game on a treadmill, under two experimental conditions: UCAN and an isoenergetic carbohydrate (CHO) placebo. There were no significant …