Digital Commons Network^™

The Effect Of Yoga On Fatigue In Breast Cancer Patients Undergoing Radiotherapy, Magdalene Bredehoeft, Karli Ribsam

Physician Assistant Capstones, 2016 to 2019

Objective: Assess the effect of yoga on levels of fatigue among women with breast cancer currently undergoing radiotherapy. Design: Systematic literature review. Methods: Searches were done on PubMed, utilizing the terms “yoga,” “fatigue,” “breast cancer,” and “radiotherapy.” Limits that led to inclusion of studies included: published after 2008, studies researching breast cancer, and studies that were randomized controlled trials. Results: Randomized controlled trials studied were by Chandwani et al. (2010), Chandwani et al. (2014), and Vadiraga et al. (2009). Conclusion: Yoga can improve quality of life among women with breast cancer undergoing radiotherapy, specifically by decreasing levels of fatigue. We …

A Survey Of Mathematical Models Of Human Performance Using Power And Energy, Vijay Sarthy Mysore Sreedhara, Gregory M. Mocko, Randolph E. Hutchison

Publications

The ability to predict the systematic decrease of power during physical exertion gives valuable insights into health, performance, and injury. This review surveys the research of power-based models of fatigue and recovery within the area of human performance. Upon a thorough review of available literature, it is observed that the two-parameter critical power model is most popular due to its simplicity. This two-parameter model is a hyperbolic relationship between power and time with critical power as the power-asymptote and the curvature constant denoted by W′. Critical power (CP) is a theoretical power output that can be sustained indefinitely by …

Perseverance, Faith And Stoicism: A Qualitative Study Of Medical Student Perspectives On Managing Fatigue, Taryn S Taylor, Alexandra L Raynard, Lorelei Lingard

Obstetrics & Gynaecology Publications

CONTEXT: Fatigue risk management (FRM) strategies offer a potential solution to the widespread problem of fatigued trainees in the clinical workplace. These strategies assume a shared perception that fatigue is hazardous. Despite the growing body of evidence suggesting that fatigue leads to burnout and medical errors, previous research suggests that residents perceive fatigue as a personal, surmountable burden rather than an occupational hazard. Before we can implement FRM, we need a better understanding of when and how such problematic notions of fatigue are adopted by medical trainees. Thus, we sought to explore how third-year medical students understand and manage the …

Estimation Of The Fatigue Life Of Additively Manufactured Metallic Components Using Modified Strain Life Parameters Based On Surface Roughness, Peter Grohs

Masters Theses

In this study, a method is developed to estimate the effects of surface roughness on the fatigue life of additively manufactured titanium Ti6Al4V, aluminum 7075–T6, and steel 4340 alloys through modified strain life parameters using finite element analysis (FEA). This method is highly beneficial to the fatigue analysis of as-built additively manufactured metal components, which possess rough surfaces that reduce fatigue life significantly but are challenging to analyze directly using finite element simulation because of complex geometries, i.e., modeling an exact surface profile is arduous.

An effective stress concentration factor, incorporating roughness data, is defined to quantify their effects on …

Application Of Survival Analysis Techniques To Probabilistic Assessment Of Fatigue In Steel Bridges, Azam Nabizadehdarabi

Theses and Dissertations

The fatigue of engineering materials under repetitive loading is a significant issue affecting the design and durability of components and systems in a variety of engineering-related applications including civil, mechanical, aerospace, automotive, and electronics. Many factors can affect the service life of a component or system under repetitive loading, such as the type of structure, loading, connection details, stress state, peak stress or stress range, surface condition, temperature, and environmental exposure. Currently, there is no comprehensive probabilistic approach that can systematically address all the factors that contribute to fatigue on a single mathematical platform. However, advanced analysis techniques developed for …

The Training Of A Para Powerlifter: A Case Study Of Adaptive Monitoring, Training And Overcoming, Derek Wilcox

Electronic Theses and Dissertations

Paralympic athletes (PA) appear to be more prone to chronic overuse injuries from daily wheelchair or crutch use. Over half of these injuries are shoulder related which can deleteriously impact quality of life. Adaptive powerlifters (AP) are a subdivision of Paralympic athletes and are at a higher risk for catastrophic injuries as compared to their counterparts, due to the compound of fatigue and lifting of maximal weights. For this reason, it is vital to have well-designed training plans for these athletes in order to preserve quality of life and maximize performance in competition. Unfortunately, there is a lack of literature …

Damage Evaluation Of Full-Scale Rc Slab By Ultrasonic Tomography, Hiroshi Hayashida, Tamon Ueda

International Conference on Durability of Concrete Structures

There have been reports of road bridges that deteriorated after their RC slabs had been repaired. The insufficient removal of damaged materials is said to be the cause of such post-repair deterioration. Consequently, there is a call for a survey method that can detect deteriorated materials of bridges with high accuracy. Towards the development of such a method, this report focuses on ultrasonic tomography, because it can detect damage to the RC slabs of road bridges over relatively large areas. We examined the applicability of ultrasonic tomography to a method of assessing the RC slab damage by a test that …

A Pilot Study To Examine The Impact Of Beta-Alanine Supplementation On Anaerobic Exercise Performance In Collegiate Rugby Athletes, Charles R. Smith, Patrick S. Harty, Richard A. Stecker, Chad M. Kerksick

Faculty Scholarship

Beta-alanine (BA) is a precursor to carnosine which functions as a buffer assisting in the maintenance of intracellular pH during high-intensity efforts. Rugby is a sport characterized by multiple intermittent periods of maximal or near maximal efforts with short periods of rest/active recovery. The purpose of this pilot study was to evaluate the impact of six weeks of beta-alanine supplementation on anaerobic performance measures in collegiate rugby players. Twenty-one male, collegiate rugby players were recruited, while fifteen completed post-testing (Mean ± SD; Age: 21.0 ± 1.8 years, Height: 179 ± 6.3 cm, Body Mass: 91.8 ± 13.3 kg, % Body …

Today's Fibromyalgia, Mckenzie K. Glennon

Student Publications

Fibromyalgia is a chronic musculoskeletal disorder which results in widespread pain, fatigue, cognitive difficulties, and emotional distress (CDC, 2017). It is also associated with abnormal pain processing. About 2% of US adults have Fibromyalgia, and the disease is more common in middle-aged women, particularly those who have other illnesses like Lupus or Rheumatoid Arthritis (CDC, 2017). The exact cause of the disease is unknown, but it is likely a combination of genetics, infections and physical and emotional trauma. Since the exact cause of Fibromyalgia is unknown, treatment options vary. Medication, stress management techniques and an exercise plan are all examples …

Wind Farm Layout Optimization With Loads Considerations, Andrew P. J. Stanley, Jennifer King, Andrew Ning

Faculty Publications

The objective of this paper is to improve the annual energy production of a wind farm by optimizing the layout of a wind farm, while considering fatigue loads on turbines. In this paper, the loads are estimated using the edgewise bending moment computed using CCBlade, a steady-state blade element momentum code. The edgewise bending moment is then used to calculate fatigue damage using Miner’s rule. The fatigue damage is used to constrain the layout optimization problem. We show that our method can predict blade root damage with similar trends to damage calculated with other methods, such as a complex, computationally …

Wear And Fatigue Behaviour Of Additive Manufactured Titanium With Tib Particles, Liza-Anastasia Dicecco

Electronic Theses and Dissertations

While titanium remains an attractive candidate in lightweighting applications, it is often restricted in use due of its poor tribological behaviour and inferior machinability characteristics, leading to its higher relative cost. To address these shortcomings, manufacturers are turning towards alternate, non-conventional manufacturing methods such as additive manufacturing (AM). The mechanical and microstructural properties of alpha, near-commercially pure, titanium made from a novel AM process, termed plasma transferred arc solid free form fabrication, is studied in this research work. Low amounts of titanium-boride (TiB) particles are of interest in as-received samples for their role as a stiffener and strengthener, which can …

Presence Of Psychosocial Symptoms In Young Adult Stroke Survivors Post-Acute Thrombectomy For Ischemic Stroke, Karen B. Seagraves

Nursing Dissertations (PhD)

PRESENCE OF PSYCHOSOCIAL SYMPTOMS IN YOUNG ADULT STROKE SURVIVORS POST-ACUTE THROMBECTOMY FOR ISCHEMIC STROKE

Young adults are the fastest growing population of stroke patients. Current treatments enable physicians to reverse hyper-acute large vessel ischemic stroke, and young adult stroke survivors (YASS) are increasingly discharged directly home with few to no apparent neurological deficits. No studies have examined the psychosocial experiences these YASS have once they are home and whether these experiences are associated with stroke-specific quality of life (SSQOL). The purpose of this study was to describe YASS post-stroke symptoms, their understanding and perception of those symptoms, and to examine …

Effects Of Neuromuscular Fatigue Resulting From Repeat Sprint Exercise Among Trained Cyclists On Measures Of Strength And Power Performance, Robert B. Blaisdell

Electronic Theses and Dissertations

The purpose of this dissertation is to better understand the role of repeated-sprint ability (RSA) and resulting fatigue in cyclists; how it relates to measures of aerobic power and strength and power performance indices- due to the nature of cycling competitions and the necessity of RSA for success.

The first part of this dissertation attempted to elucidate the relationship between RSA and aerobic power and strength/ power measures in competitive cyclists. The purpose was to potentially illustrate the importance of the inclusion of strength and power training in the training regimen of cyclists. The findings showed several statistically significant relationships …

Demographic, Clinical, And Treatment Characteristics Of The Juvenile Primary Fibromyalgia Syndrome Cohort Enrolled In The Childhood Arthritis And Rheumatology Research Alliance Legacy Registry., Jennifer E. Weiss, Kenneth N. Schikler, Alexis D. Boneparth, Mark Connelly, Carra Registry Investigators

Manuscripts, Articles, Book Chapters and Other Papers

BACKGROUND: To describe the demographic, clinical, and treatment characteristics of youth diagnosed with juvenile primary fibromyalgia syndrome (JPFS) who are seen in pediatric rheumatology clinics.

METHODS: Information on demographics, symptoms, functioning, and treatments recommended and tried were obtained on patients with JPFS as part of a multi-site patient registry (the Childhood Arthritis and Rheumatology Research Alliance Legacy Registry). Data were summarized using descriptive statistics. In a subset of patients completing registry follow-up visits, changes in symptoms, pain, and functioning were evaluated using growth modeling.

RESULTS: Of the 201 patients with JPFS enrolled in the registry, most were Caucasian/White (85%), non-Hispanic …

Cardiorespiratory Fitness Alleviates The Effect Of Fatigue On Basketball Free Throw Shooting Performance, Steven Leigh, Suzanne Konz, Brittney Rolfe

ISBS Proceedings Archive

Fatigue causes basketball players to change their movement patterns while shooting free throws, leading to missed shots. Cardiorespiratory fitness may moderate this negative relationship. Male collegiate basketball players completed a VO₂max test to determine their fitness. On another day, each player shot 10 free throws, then performed a basketball-specific fatigue protocol, and then shot 10 more free throws. Shot accuracy, shot consistency, and shooting kinematics were calculated from video analyses. Shot accuracy was unchanged, shot consistency worsened (p = 0.03), and peak knee flexion angle increased (p < 0.01) for all players following the fatigue protocol. Fitter players were more accurate (p < 0.01) and more consistent (p = 0.02) when shooting while fatigued. Conditioning …

The Effects Of Fatigue On Softball Pitcher From Pitching Multiple Games, Tom Wu, Christine Semler, Pamela J. Russell, Tsung-Lin Lu

ISBS Proceedings Archive

The purpose of this study was to examine the effects of fatigue on softball pitching from pitching back to back games. Players were asked to throw 15 balls in each inning for seven innings and for a total of two games. The results showed fastball’s velocity in the first inning of the first game (25.4 ± 2.5 m/s) had significantly decreased after a game and a half (24.3 ± 2.7 m/s; p = 0.00). Hence, this study suggests that the pitchers started to show signs of fatigue after this amount of pitches (165 pitches), so softball coaches may take this …

Tropomyosin-Based Effects Of Acidosis On Thin-Filament Regulation During Muscle Fatigue, Brent Scott

Masters Theses

Skeletal muscle fatigue is defined as a loss in the force/velocity generating capacity of a muscle. A portion of the loss in function is attributable to effects of acidosis (i.e. low pH) on the regulatory proteins, troponin and tropomyosin (Tm), which regulate the binding of myosin and actin in a calcium (Ca⁺⁺) dependent manner. However, the relative role of troponin and Tm on myosin-actin function during acidosis is not clear, nor are the mechanisms underlying these effects. PURPOSE: To determine the role of Tm in the acidosis-induced depression of muscle function using isolated muscle proteins in an in …

Risk And Resistance Factors For Depression And Anxiety Among Youth With Sickle Cell Disease, Laura Reinman

Theses and Dissertations

Objective: Depression and anxiety are common problems for adolescents with sickle cell disease (SCD). It is important to understand both risk and resiliency factors contributing to psychological outcomes among youth with SCD in order to prevent and effectively treat such problems. To better elucidate contributing factors to depression and anxiety among youth with SCD selected risk and resiliency factors from the risk-and-resistance model adapted for SCD were examined (Barakat, Lash, Lutz, & Nicolaou, 2006). The risk factor of fatigue and resistance/resiliency factors of cognitive appraisal of stress and self-concept are of focus because they have been understudied, and their temporal …

Impacts Of Blood Flow Occlusion On The Human Neuromuscular System, David B. Copithorne

Electronic Thesis and Dissertation Repository

Blood flow restricted or occlusion (BFO) exercise uses external pressure to impede blood flow, thus reducing the amount of oxygenated blood reaching the muscle, with greater pressure causing greater obstruction of blood flow. The result is enhanced muscle fatigability. The four studies in this thesis investigate how BFO acutely affects muscle fatigue, the neuromuscular system, muscle contractile properties and motor unit firing rates, using a combination of electrical stimulation, transcranial magnetic stimulation, transmastoid stimulation, force production, and electromyography (EMG).

Study one investigated whether BFO low-intensity isometric contractions to failure of the arm flexors elicits greater muscle fatigue compared to low-intensity …

Fatigue Performance Of Rc Beams Strengthened With Near Surface Mounted Cfrp Composites, Tamer Ghaith Mousa Eljufout

Dissertations

Bridges have a fundamental role in improving the effectiveness of highways and providing an expedient and express traffic system. Over time, Reinforced Concrete (RC) bridges degrade due to gradually increased traffic loads and environmental deteriorations. Subsequently, service loads might cause higher stresses in concrete and steel reinforcement than stresses considered in the design stage. This affects the structural performance of RC beams and leads to sudden fatigue failure. As such, there is an essential need for rehabilitation to avoid hazards and tragedies.

Carbon Fiber Reinforced Polymer (CFRP) composites are becoming widely used to strengthen RC bridges. Near Surface Mounted (NSM) …

Oral Glutamine Supplement Reduces Subjective Fatigue Ratings During Repeated Bouts Of Firefighting Simulations, Mary Moore, Terence A. Moriarty, Gavin Connolly, Christine Mermier, Fabiano Amorim, Kevin Miller, Micah Zuhl

Faculty Publications

Wildland firefighting requires repetitive (e.g., consecutive work shifts) physical work in dangerous conditions (e.g., heat and pollution). Workers commonly enter these environments in a nonacclimated state, leading to fatigue and heightened injury risk. Strategies to improve tolerance to these stressors are lacking. Purpose: To determine if glutamine ingestion prior to and after consecutive days of firefighting simulations in the heat attenuates subjective ratings of fatigue, and evaluate if results were supported by glutamine-induced upregulation of biological stress responses. Methods: Participants (5 male, 3 female) ingested glutamine (0.15 g/kg/day) or a placebo before and after two consecutive days (separated by 24 …

Contribution Of Sleep Disruption And Physical Inactivity To Fatigue In Survivors Of Allogeneic Hematopoietic Cell Transplant, Ashley M. Nelson

USF Tampa Graduate Theses and Dissertations

Background: Fatigue is a prominent quality of life concern among cancer patients who have undergone allogeneic hematopoietic cell transplantation (HCT). The high percentage of HCT patients reporting fatigue concerns warrants investigation into factors that may contribute to or alleviate fatigue. The present study sought to elucidate relationships among fatigue and behavioral factors including sleep disruption and sedentary activity.

Method: Allogeneic HCT recipients who were one to five years post-transplant were invited to participate in the present study. Participants wore an actigraph assessing sleep efficiency and sedentary behavior for one week, completed daily assessments of fatigue and sleep during the same …

Heart Rate Variability Monitoring During Strength And High-Intensity Interval Training Overload Microcycles, Christoph Schneider, Thimo Wiewelhove, Christian Raeder, Andrew Flatt, Olaf Hoos, Laura Hottenrott, Oliver Schumbera, Michael Kellmann, Tim Meyer, Mark Pfeiffer, Alexander Ferrauti

Department of Health Sciences and Kinesiology Faculty Publications

Objective: In two independent study arms, we determine the effects of strength training (ST) and high-intensity interval training (HIIT) overload on cardiac autonomic modulation by measuring heart rate (HR) and vagal heart rate variability (HRV).

Methods: In the study, 37 well-trained athletes (ST: 7 female, 12 male; HIIT: 9 female, 9 male) were subjected to orthostatic tests (HR and HRV recordings) each day during a 4-day baseline period, a 6-day overload microcycle, and a 4-day recovery period. Discipline-specific performance was assessed before and 1 and 4 days after training.

Results: Following ST overload, supine HR, and vagal HRV (Ln RMSSD) …

Evaluation Of Structural Contribution Of Asphalt Mixtures Through Improved Performance Indices, Rasool Nemati

Doctoral Dissertations

A variety of approaches are available to design the pavement structures. These approaches are generally divided into two main categories as empirical and mechanistic-empirical (M-E) methods. The most widely used empirical method is the AASHTO 1993 design approach which uses material specific coefficients (layer coefficients) to quantify the structural capacity provided by each pavement layer. These coefficients are experimentally developed values from the AASHO road test which was conducted in the early 1960s and are based on statistical regressions. Almost no fundamental or engineering mixture properties or explicit failure criterion were used in their original development. On the other hand, …

Managing The Effects Of Poor Sleep Quality In Nurses, Emily Huene, Sarah Rausch, Georgia Vasiu, Hannah Lopez, Rachael Valentz, Msn, Rn, Ccrn

Nursing Undergraduate Work

Staffing shortages, high turnover rates, and prolonged work shifts has caused decreased sleep quality in nurses due to fatigue. The fatigued nurse causes concern for safety, coordination and agility, patient avoidance, lack of compassion, impaired cognitive function, risk for chronic diseases, and patient care errors. This systematic research review was designed to identify evidence-based practice nursing interventions currently being used to manage the effects of reduced sleep quality. Methods for performing this systematic research review were to search multiple databases using keywords, scanning article titles and abstracts, and critiquing for relevance and quality. Findings from this systematic review found multiple …

Development Of A Model For Accelerated Fatigue Testing In Venous Valves, Olga Brazhkina

Biomedical Engineering Undergraduate Honors Theses

Malfunctioning venous cause issues ranging from cosmetic to life threatening situations for millions of people in the U.S. (1). Venous valve bioprosthetics often fail due to a loss in leaflet tissue flexibility following chemical fixation of donor tissue (2). A viable solution for testing venous valves prior to and post chemical fixation is in high demand for the development of a more durable prosthetic replacement. As a result, this research aims to create a fatigue apparatus that provides a means to model the durability of venous valves. The design criteria for this project included modeling physiological conditions in an accelerated …

Surface Roughness Effect On Multiaxial Fatigue Behavior Of Additive Manufactured Metals And Its Modeling, Jingzhe Zhang

Electronic Theses and Dissertations

Additive manufacturing (AM) has become a very popular topic recently due to its many advantages including short build cycles, convenience of customozation, and most importantly the ability to build components with complex geometry. However, the surface condition of additive manufactured components is not always satisfactory, particularly with respect to fatigue performance. This is because the as-built surface tends to be rough and post surface treatments or processes such as machining and polishing may not be applicable to all AM parts. On the other hand, since many components are under cyclic loading consisting of normal and shear stress, multiaxial fatigue behavior …

Effects Of Exercise Environment On Quality Of Life And Fatigue In Breast Cancer Survivors, Brittany Marie Edwards

Electronic Theses and Dissertations

The primary goal of this study was to determine if an eight-week exercise intervention can improve quality of life and decrease fatigue in breast cancer survivors. The exercise intervention was uniquely designed to foster learning and improve the self-efficacy of the study subject. The first four weeks of the study encompassed learning to format an exercise routine based on the recommendations of the American College of Sports Medicine and learning basic exercises. The final four weeks of the intervention involved the subject implementing their own unique routine with the supervision of the lead investigator. The outcome measures include a quality …

Fatigue Strength Evaluation And Fracture Behavior Of Joined Dual Phase Steel/Aa6061-T6 Aluminum Alloy, Ruben Perez Mora, Celso Eduardo Cruz Gonzalez, Saul Daniel Santillan Gutierrez, Jaime Taha-Tijerina, Benjamin Vargas Arista, Arturo Barba Pingarron

Informatics and Engineering Systems Faculty Publications and Presentations

The fatigue strength evaluation and fracture behavior for a dual phase steel-AA6061-T6 bonded joints with three different adhesives (DC-80, Betamate 120 and MP55420) are presented in this paper. Single lap shear tests were used to determine maximum shear loads, for the single lap shear testing for 5.0 mm overlap length were 2 to 3.5 times higher in comparison to the 12.7 mm overlap length specimens. The results for the strain measurement revealed that higher strain-stress were developed in the 6061-T6 aluminum alloy adherend and in all cases they were lower than the adherends yield strength. Fatigue testing was carried out …

The Regulation Of Skeletal Muscle Fatigue During The Progression Of Cancer Cachexia, Brandon N. Vanderveen

Theses and Dissertations

Cachexia is the unintentional loss of body weight secondary to chronic disease and is prevalent is roughly 50% of cancer patients. The loss of body weight and skeletal muscle mass is reduced functional capacity associated with reduced life quality. The etiology of cachexia is multimodal and complex; however, cachexia has been linked to several systemic (e.g. chronic inflammation, hypogonadism, anemia, insulin resistance) and behavioral (e.g. anorexia, inactivity) changes that can compound to accelerate muscle mass and body weight loss. While several inflammatory cytokines are associated with cachexia’s disease progression, our laboratory has established that Interleukin-6 (IL-6) is a key regulator …