Medicine and Health Sciences Commons^™

Lbnp Reduces Cerebral Perfusion But Does Not Impact Executive Function, James Van Riesen

Electronic Thesis and Dissertation Repository

A growing body of literature has demonstrated that a single bout of aerobic exercise and/or hypercapnic manipulations increase cerebral blood flow (CBF) and are linked to a transient (i.e.,min) post-intervention executive function (EF) benefit. However, there are no direct studies examining whether a transient decrease in CBF elicits a post-intervention EF decrement. Accordingly, my thesis employed 10-min single bout manipulations of -30 mmHg and -50 mmHg lower-body negative pressure (LBNP) to determine whether a transient reduction in CBF impacts EF. LBNP was applied as it renders sub-atmospheric pressure to the lower limbs and redistributes blood from the upper to lower …

Advancing Type 2 Diabetes As A Condition For Primary Referral To Physiotherapy In Canada, Sarah M. Janssen

Electronic Thesis and Dissertation Repository

Obesity and sedentary lifestyle are increasingly prevalent risk factors for type 2 diabetes (T2D), characterized by high blood glucose levels. Adoption and maintenance of healthy eating, physical activity, and exercise is recommended for lowering blood glucose and weight management. Physiotherapists are experts in prescribing safe, effective exercise to optimize health for people with co-morbid health conditions. However, T2D is not a primary condition for referral to physiotherapy services in Canada. The overall question guiding a series of three related studies was, What is the current education and perspectives of Canadian physiotherapists about their role in managing T2D? Study one surveyed …

Non-Pharmacological Management Of Community Dwelling Individuals With Osteoporosis Or At Risk Of Developing Osteoporosis, Christina Ziebart

Electronic Thesis and Dissertation Repository

Background:

Osteoporosis is a bone disease that increases the risk of fractures. In adults aged 50-65 years, a wrist fracture is usually the first sign of osteoporosis. Fracture risk increases if these individuals are not taught to exercise, eat properly, and/or identify fall risk factors early in their diagnosis.

Methods:

A meta-analysis was conducted to determine whether a home fall hazard identification program could reduce the risk of falls in community dwelling adults and an overview of exercise in individuals with a distal radius fracture (DRF). CINHAL, PubMed, EMBASE, Scopus, and Psych INFO were used to identify articles. A survey …

Increased Lipid Metabolism In Response To Repetitive Aerobic Exercise During Proestrus In Type 1 Diabetes Mellitus Rats, Silar Gardy

Electronic Thesis and Dissertation Repository

In response to repetitive bouts of aerobic exercise, type I diabetes mellitus (T1DM) female rats demonstrate greater post-exercise blood glucose (BG) recovery during proestrus than T1DM males. Fuel selection differences may explain sex-related differences in the blunted counterregulatory responses to subsequent exercise and estrogen (E2) has shown to mediate fuel metabolism. Evidence of E2’s activation of AMP-kinase (AMPK) may mediate the metabolic actions of E2. This study aimed to examine sex-related differences in lipid and glucose metabolism in response to a 4-day aerobic exercise protocol in skeletal muscle and liver tissue of male and female T1DM-induced (n = 5) and …

The Process Of Exercise Participation In The Community For Functional Recovery Post Formal Rehabilitation Among Survivors Of Stroke: A Grounded Theory Study, Nicole M. Evans

Electronic Thesis and Dissertation Repository

The effects of stroke pose a challenge on independence and community participation, which are common goals among survivors of stroke during recovery. Exercises are implemented during rehabilitation services and have a profound effect on functional recovery; however, services are limited, where adherence levels to exercise post discharge are less than ideal. The aim of this research was to understand the process of exercise participation for functional recovery among community living survivors of stroke following discharge from formal rehabilitation. Findings of this constructivist grounded theory study provided insight into the phases leading to exercise commitment –contact with a healthcare provider, desire …

Lived Experience And Process Of Engagement In Physical Exercise For Older Adults With Chronic Back Pain, Melissa E. Hay

Electronic Thesis and Dissertation Repository

For older adults, physical exercise is especially important in maintaining functional independence, extending quality of life, and optimizing personal health resources. For patients with chronic pain conditions, exercise participation can significantly improve patient-reported symptoms. Older adults are the most sedentary age group with the majority not meeting the recommended duration and intensity of weekly exercise. Although nonadherence with exercise guidelines may result for a variety of reasons, adverse health conditions including chronic pain are likely of particular concern for older adults. The aim of this research, consisting of two studies employing interpretive phenomenology and constructivist grounded theory, was to understand …

Barriers To Prescribing Exercise In Clinical Practice To Treat Mild-To-Moderate Depression, Andrew D. Hanna

Electronic Thesis and Dissertation Repository

The benefits of incorporating physical activity to moderate the effects of various chronic diseases have been well documented; however, some settings of clinical practice fail to utilize these benefits to treat conditions such as mild-to-moderate depression. To improve the integration of physical activity as a prescribing practice to treat depression, a better understanding of patient attitudes towards physical activity is needed. Various barriers exist when attempting to prescribe exercise for patients diagnosed with depression. Due to the symptoms of depression, patients often report various barriers and difficulty to engaging in exercise such as deficits in motivation, low energy levels and …

Exercise Protects Against Congenital Heart Defects Induced By Pregestational Diabetes, Tana Saiyin

Electronic Thesis and Dissertation Repository

Pregestational diabetes is a risk factor for birth defects, with diabetic women having a four times higher risk of producing children with congenital heart defects (CHDs). This is concerning because the prevalence of diabetes is growing at epidemic proportions. The purpose of this thesis is to investigate whether exercise can also reduce hyperglycemia-induced CHDs and determine the underlying mechanism. Endothelial nitric oxide synthase (eNOS) is a critical enzyme for normal cardiogenesis that can be upregulated with exercise in adult cardiovascular tissue. However, whether maternal exercise can regulate fetal eNOS and affect heart development has yet to be studied. In this …

The Effect Of Insulin Treatment And Exercise Modality On Skeletal Muscle Fiber Size In Streptozotocin-Induced Type 1 Diabetic Rats, John Z. Nickels

Electronic Thesis and Dissertation Repository

Severe Type 1 Diabetes Mellitus (T1DM) is known to have several negative effects on skeletal muscle mass, a condition known as diabetic myopathy. One of these effects is the atrophy of the glycolytic muscle fibers. However, the role of intensity of insulin treatment and exercise modality in attenuating this loss in fiber cross-sectional area (CSA) specifically has yet to be determined. The purpose of this investigation was to determine the effects of 12 weeks of differing intensity of insulin therapy and exercise modality on the CSA of plantaris muscle fibers, identified by myosin heavy chain (MHC) of STZ-induced T1DM rats. …

Smoking And Exercise: Mechanisms And Effects During Simulated And Genuine Quit Attempts, Stefanie De Jesus

Electronic Thesis and Dissertation Repository

Cigarette smoking is a leading agent for premature morbidity and mortality among the global community. Most individuals surrender to tobacco use disorder due to the inability to cope with cravings and withdrawal symptoms. Exercise appears to provide acute relief. Currently, it is unclear how exercise attenuates these reductions. Furthermore, the available evidence has focused on acute outcomes besides smoking behaviour and is limited to simulated quit attempts. Three experimental studies were designed to address these outstanding issues. Not surprisingly, a bout of moderate intensity exercise was found in study 1 (chapter 2) to reduce cravings associated with a temporary period …

The Use Of Exercise Self-Talk By Female Adolescents, Sadie Puddister

Electronic Thesis and Dissertation Repository

Already below recommended levels, physical activity participation in female youth is known to decline throughout adolescence. Self-talk, a form of self-regulation has been demonstrated to influence behaviour in both sport and exercise settings. The purpose of the present research was to explore the exercise related self-talk of teen girls (aged 14-18) with the intent of uncovering reoccurring themes and attributes in the self-talk of both low frequency exercisers (LFEs) and high frequency exercisers (HFEs). Participants were teen girls (N=28, M_age=15.56, SD_age=1.47) recruited from A. B. Lucas Secondary School in London, Ontario. Physical activity …

The Effect Of A Multiple Modality Mind-Motor Exercise Intervention On Single And Dual-Task Gait, Balance, And Executive Function, In Community Dwelling Older Adults With A Subjective Cognitive Complaint: A Randomized Controlled Trial., John P. Bocti

Electronic Thesis and Dissertation Repository

Cognitive decline disorders are becoming increasingly prevalent, with older adults at increased risk. Combined exercise has been recently explored as an intervention to help to prevent the decline, however cognitive activation in combination with physical activity has yet to be explored. Therefore, the purpose of the study is to determine the effects of multiple modality exercise programs in combination with a mind-motor task and their effects on mobility and cognitive variables. A total of (n=89) older adults (55+ yrs), with subjective cognitive complaints participated in a multiple modality exercise class, three days a week over six months, with the intervention …

The Effect Of Aerobic Exercise Training On Hepatic Glycogen Metabolism In Type 1 Diabetic Rats, Michael Murray

Electronic Thesis and Dissertation Repository

The purpose of this investigation was to determine if ten weeks of aerobic exercise training could increase hepatic glycogen storage in rats with Type 1 Diabetes Mellitus (T1DM) and whether elevated hepatic glycogen content is associated with alterations in glycogenic proteins and insulin signaling. Rats were divided into control-sedentary, control-exercised, T1DM-sedentary and T1DM-exercised groups. Animals from each group underwent a euglycemic-hyperinsulinemic clamp at the conclusion of the study. Exercise training consisted of treadmill running at 27m/min, 6% incline for 1hr, five days/week for ten weeks. T1DM rats had lower liver glycogen concentrations than control rats and glycogen was not increased …

An Examination Of Psychological Variables Influencing Perceptions Of The Self Among A Sample Of Female Exercise Initiates, Lisa Cooke

Electronic Thesis and Dissertation Repository

The general purpose of this dissertation was to explore the relationship among and within cognitive variables associated with exercise initiation and maintenance in a sample of female exercise initiates.

Manuscript 1 was structured to explore the changes to exercise identity among a population of female exercise initiates (N = 78) grouped into an imagery or control condition. Previous research has found that a strong exercise identity is associated with more frequent exercise (Strachan et al., 2009) and increases over time as a person continues to exercise (Cardinal & Cardinal, 1997). Participants were assessed multiple times (weeks 0, 5, 9, …

Mixed Methods Pilot Study Of Peri-Diagnostic Exercise Behaviour Change Among Women With Suspected Breast Cancer, Amy L. Deckert

Electronic Thesis and Dissertation Repository

Approximately 1 in 9 Canadian women will develop breast cancer in their lifetime (CCS, 2013). Over the past 30 years, population-based screening programs have contributed to decreased mortality rates (CCS, 2013), however the psychosocial sequelae associated with screening for breast cancer cannot be ignored (Holland et al., 2010). Although the majority of women screened will receive a benign diagnosis, the threat of malignancy can induce elevated levels of distress (Andrykowski et al., 2002).

We conducted a mixed methods pilot study to assess the feasibility and acceptability of a 6-week self-managed exercise behaviour change intervention to attenuate distress in women with …

Community Physiotherapy And Chronic Disease Self-Management For Rural Community-Dwelling Older Adults, Laura J. Graham

Electronic Thesis and Dissertation Repository

Research problem: The majority of older Canadians live with at least one chronic disease. Exercise has been shown to be an effective means to reducing symptoms, and to improving physical dysfunction in chronically ill populations; and self-management is a nationally advocated approach to dealing with the growing health care issue of chronic disease. Physiotherapists are experts in prescribing therapeutic exercise and promoting chronic disease self-management.

Methods: This two-study dissertation explored older adults’ perceptions of exercise as a self-care activity within a chronic disease self-management strategy using focused ethnography; and physiotherapists’ experiences in promoting exercise as a means to chronic disease …

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 …

Prehabilitation For Total Knee Arthroplasty: A Patient-Centred Approach To Maximizing Surgical Outcomes, Carly D. Mckay

Electronic Thesis and Dissertation Repository

The purpose of this dissertation was to investigate the role of prehabilitation in post-operative recovery for patients undergoing total knee arthroplasty (TKA) for osteoarthritis. Study one was a meta-analysis that aimed to consolidate the body of knowledge regarding prehabilitation for TKA patients. Study two compared the Lower Limb Tasks Questionnaire (LLTQ) to the Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) in terms of agreement and responsiveness. Study three investigated the effect of a six-week pre-surgical strength training program on post-operative outcomes (quadriceps strength, mobility, pain, self-reported function, health-related quality of life, arthritis self efficacy) for TKA patients. Finally, study …

Physical Function During Performance-Based Tasks And Throughout Daily Life. Is It Different Across Levels Of Frailty?, Olga Theou

Electronic Thesis and Dissertation Repository

The overall aim of this thesis was to provide a more focused understanding about the physical function of older women across levels of frailty. The specific aims were: 1) Examine the physical function of older women across levels of frailty during performance-based tasks and throughout their normal daily life; and 2) Review the effectiveness of current exercise interventions for the management of frailty. To answer these aims an observational study of community-dwelling older women (63-100 years) from rural Greece and a comprehensive systematic review on the impact of exercise on frail older adults were conducted. The performance-based measures that had …