Kinesiology Commons^™

Exploring The Biological Basis For Exercise Neuroprotection In Parkinson’S Disease: A Cross-Sectional Study Of Exercise And Physical Activity On Inflammatory Cytokines And Neurotrophins, Leah Isabelle P. Alegre, Jacob M. Brewer, Adeline Florschutz, Kate E. Hamiltonthompson

UNLV Theses, Dissertations, Professional Papers, and Capstones

Regular exercise and physical therapy are known to increase production of neurotrophins, including brain-derived neurotrophic factor (BDNF), and anti-inflammatory cytokines. These changes combine to theoretically protect and slow the progressive loss of neurons in Parkinson’s disease (PD). The purpose of this study was to examine the effect of exercise and physical activity on various anti-inflammatory and pro-inflammatory cytokines and neurotrophins in people with PD (PwP). This was a cross-sectional design involving PwP (n=37), aged 43-85 years, who participated in two 30-minute bouts of exercise (with brief rest breaks during and pre/post blood draws) separated by a week. Measures collected prior …

Examining Demographic And Contextual Differences In Stress-Related Sport Interference Among U.S. Collegiate Sport Participants, Heather Tran

UNLV Theses, Dissertations, Professional Papers, and Capstones

Collegiate athletes experience a range of stressors that may interfere with sport performance; however less is known about how stress-related sport interference varies across demographic groups and contexts. Guided by the transactional model of stress and coping, this study examined differences in stress-related sport interference by gender, race/ethnicity, and year in school, as well as across situational contexts (training, competition, and life outside of sport). Data were drawn from a secondary dataset of 288 collegiate sport participants who completed the Sport Interference Checklist (SIC). Independent samples t-test and analyses of variance (ANOVA) were used to examined demographic differences, and a …

Application Of Occupational Therapy Task-Oriented For Chronic Post-Stroke Rehabilitation: A Case Study, Gia Nghi Vu

UNLV Theses, Dissertations, Professional Papers, and Capstones

Stroke remains the leading cause of long-term disability, with persistent upper extremity (UE) impairment limiting engagement in daily tasks, reducing quality of life and contributing to learned non-use in the chronic stage among stroke survivors. The Occupational Therapy Task Oriented (OTTO) approach is proposed to optimize occupational performance through the use of meaningful, functional and highly individualized tasks that enable clients to fulfill their valued roles and participate in desired daily activities. The purpose of this capstone project was to advance clinical skills by applying the OTTO approach to examine its effect on occupational performance and UE motor function in …

Core Temperature While Swimming In Warm Open Water With And Without A Wetsuit, Katsiaryna Afanasyeva

UNLV Theses, Dissertations, Professional Papers, and Capstones

Triathlon is a popular sport which attract participants from all over the world. In general, triathlon is a safe sport with risk of death being about 1.74 deaths per 100,000 participants (Harris et al., 2017). The swimming portion of the race can be dangerous, posing particular risks due to open water conditions and the physical demands of the event. This study investigated the effects of wetsuit use on core temperature in warm open-water swimming (27.9–28.3°C). Four experienced triathletes (2 males, 2 females; age 49.50 ± 7.83 years) completed two 700-meter open-water swims at a submaximal pace—once wearing their personal full-sleeve …

The Effects Of Blood Flow Restriction And Body Weight Support Treadmill Walking On Electromyographic Activity In Lower Limb Muscles, Cyanea Davies

UNLV Theses, Dissertations, Professional Papers, and Capstones

Blood flow restriction (BFR) is an emerging rehabilitation modality shown to enhance muscle activation and elicit strength gains comparable to high-intensity training at lower loads (Cognetti et al.,2019). Body weight support (BWS) treadmill walking is another modality that has gained popularity due to the effect it has on lowering muscle activation with increasing support levels (Jensen et al.,2016). However, to date no research has looked at electromyographic (EMG) activity utilizing both modalities concurrently. This study investigated if stride frequency (SF) and muscle activity of the rectus femoris (RF), biceps femoris (BF), tibialis anterior (TA) and gastrocnemius (GA) would be influenced …

Expanding Anatomy Academy In The Las Vegas Metropolitan Area: A Service Learning Project To Improve Childhood Health Through Supplemental Educational Sessions, Alekzander Hall, Brandon Paige, Marlee Parkin, David Sanchez

UNLV Theses, Dissertations, Professional Papers, and Capstones

Childhood obesity is a growing epidemic in the United States, with approximately 18.5% of US children presenting with obesity. High levels of obesity are less common in higher income communities, but increasingly more prevalent in lower income communities. Currently in Clark County, Nevada, more specifically in lower socioeconomic communities and Title I schools within the Las Vegas area, there is an opportunity to educate students about the components of a healthier lifestyle to provide children with the tools to improve their health. Anatomy Academy (AA) is an eight-week health education program that was created to teach fourth and fifth grade …

Torque Efficacy Of Cadmus Bracket Design Using Clear Aligners, Joseph Soderberg

UNLV Theses, Dissertations, Professional Papers, and Capstones

Introduction: Clear aligner therapy (CAT) is an alternative option for clinicians to use for orthodontic treatment as opposed to fixed appliances. Many patients prefer clear aligner therapy due to its esthetic looks, removability, ease of oral hygiene, and comfort. Clear aligner companies boast to clinicians that it can be used more efficiently and effectively than fixed appliances in many orthodontic cases. Although these claims have been made, there is a lack of evidence to prove that clear aligner therapy is more efficient or effective. This research will focus on torque control. This project is designed around a new, pre-manufactured attachment …

Effects Of Altered Somatosensory Input On Gait Kinetics And Kinematics Via Different Footwear In Individuals With Chronic Post-Stroke Hemiparesis, Daniela Casillas, Lesley Ruiz

UNLV Theses, Dissertations, Professional Papers, and Capstones

Purpose/Hypothesis: Individuals with post-stroke hemiparesis walk with significant asymmetries, leading to slow, effortful walking, and a high risk of falls. One contributing factor is altered sensation on the plantar surface. Studies examining altered somatosensory input via insoles, vibration and other tactile stimuli observed improvements in hemiparesis gait. This study investigates whether altering somatosensory input through different footwear can affect kinetics, kinematics and muscle activity during walking post-stroke. We hypothesized the barefoot conditions would have increased dorsiflexion (heel-strike, swing), increased plantarflexion during toe-off, increased muscle activity and kinetics, compared to memory foam conditions.

Participants: 13 individuals with chronic post-stroke hemiparesis (4F/9M, …

Understanding Failure Mechanisms For Two Colorectal Anastomosis Techniques, Youssef Sherif Sadek Fahmy

UNLV Theses, Dissertations, Professional Papers, and Capstones

Colorectal Surgery continues to be one of the most common gastrointestinal surgeries performed in the US. A common complication known as Anastomotic Leakage (AL) that threatens up to 30% of patients with this surgery. Many cases of AL can decrease the quality of life for patients or extensively extend hospital stays, and in many cases, lead to death. Researchers have studied this complication in clinical trials, yet few studied the mechanics of stapled anastomosis in controlled environments. The purpose of this research was to understand the mechanical interaction between the staples and the tissue, and to eventually apply it in …

The Influence Of Dual Sources Cerebellar Transcranial Direct Current Stimulation On Muscle Fatigue, Janriek Asuncion Bognot

UNLV Theses, Dissertations, Professional Papers, and Capstones

Transcranial direct current stimulation (tDCS) applied unilaterally to the cerebellum (ctDCS) can improve several aspects of human motor performance. The purpose of the study was to examine the influence of dual source tDCS delivered bilaterally over the cerebellar cortices (dsc-tDCS) on the time to task failure (TTF) of a fatiguing contraction. The study utilized a double-blind, randomized, SHAM-controlled, within-subjects, crossover design and participants were given either dsc-tDCS or SHAM stimulation in two different experiments held 7 days apart. Every aspect of the two experiments was the same except the type of stimulation (dsc-tDCS or SHAM) delivered during the fatiguing contraction. …

Development And Usage Of Analytic Tools And Recommendations For Validation And Reliability Studies Using Consumer-Grade Wearable Technology, Bryson Carrier

UNLV Theses, Dissertations, Professional Papers, and Capstones

Introduction: Wearable technology is increasingly utilized across various fields, yet the validity and reliability of the physiological data these devices provide are often unverified due to a lack of rigorous testing standards.

Purpose: This dissertation contains three primary works, and therefore multiple purposes. The purpose of the first project (Chapter 2) is to introduce a new risk of bias assessment tool, specifically for assessing methodological quality and the risk of bias in validity and reliability studies using wearable technology, with a focus on consumer-grade wearable technology. The purpose of the second project (Chapter 3) was to perform a systematic review …

The Influence Of Bihemispheric Transcranial Direct Current Stimulation On Muscle Fatigue, Ananya Singh Chauhan

UNLV Theses, Dissertations, Professional Papers, and Capstones

Unilateral transcranial direct current stimulation (tDCS) using two electrodes placed over the primary motor cortex (M1) and the contralateral supraorbital (SO) region (M1-SO montage) has been shown to decrease the progression of muscle fatigue. The primary purpose was to determine the impact of bihemispheric tDCS (bi-tDCS) applied over the left and right M1s (bi-tDCS) on the time to task failure (TTF) of a precision-grip task. The study implemented a double-blind, randomized, SHAM-controlled, within-subjects design. A total of 20 participants performed two experimental sessions (bi-tDCS and SHAM conditions) separated by a one-week washout. During each experimental session, a fatiguing isometric contraction …

The Effect Of Dual Source Premotor Cortex Transcranial Direct Current Stimulation On Muscle Fatigue In Hand Muscles, Valentino Contini

UNLV Theses, Dissertations, Professional Papers, and Capstones

Single source transcranial direct current stimulation (tDCS) has been shown to increase the time to task failure (TTF) fatiguing contractions when applied to the dorsolateral prefrontal cortex (DLPFC) and to the primary motor cortex (M1). The primary purpose was to determine whether dual source tDCS delivered bilaterally over the premotor cortices (pmc-tDCS) could increase the TTF of a fatiguing contraction performed by hand muscles. A double-blind, randomized, SHAM-controlled, crossover design was used for this study with each participant performing two experimental sessions held on separate days a week apart. The only difference between the two sessions was the type of …

A Comparison Of Spinal Reflex Function And Morphological Adaptations Of The Achilles Tendon Between Individuals Chronically Post-Stroke And Healthy Controls, Migi Contreras, Mira Seekins, Johanna Mendez, Trevor Diez

UNLV Theses, Dissertations, Professional Papers, and Capstones

Purpose/Hypothesis: The hallmark gait deviation in individuals with post-stroke hemiparesis is slow walking speed. Reduction in gait speed after stroke is influenced by decreased propulsive forces, which may likely be related to impaired spinal circuit function and spasticity of the paretic plantarflexors. Chronic muscle tone maladaptations in paretic ankle plantarflexors can result in altered Achilles tendon (AT) morphology, therefore leading to altered mechanical properties, force transmission capabilities and subsequent insufficient propulsive forces during walking. The purpose of this study is to characterize the chronic maladaptations in both the spinal Ia afferent loop excitability and AT morphology after stroke lesions in …

Mindfulness For Middle School Students Receiving Adapted Physical Education Services: Quality Improvement Program, Kaila Mangrum

UNLV Theses, Dissertations, Professional Papers, and Capstones

Middle school students with disabilities are often isolated from their peers with decreased opportunities for participation, struggle with social emotional regulation, and self-efficacy. This has been evident among students with various disabilities who are from various age groups receiving special education services including adapted physical education (APE). Research has shown mindfulness amplifies learning and promotes a positive environment that supports children’s overall wellbeing. This quality improvement project focused on developing an occupational therapy centered mindfulness program to enhance social participation, self-efficacy, and social-emotional regulation. Data collection occurred pre and post program from specialized program teacher assistants (SPTAs) using the School …

The Effect Of Transcranial Direct Current Stimulation Of The Dorsolateral Prefrontal Cortex On Muscle Fatigue Resistance, Taylie Thompson Liddell

UNLV Theses, Dissertations, Professional Papers, and Capstones

Transcranial direct current stimulation (tDCS) delivered to the dorsolateral prefrontal cortex (DLPFC) can increase endurance time in lower body cycling tasks. The purpose was to examine the effect of DLPFC-tDCS on the time to task failure (TTF) of a fatiguing contraction performed by hand muscles. The study used a double-blind, randomized, SHAM-controlled, crossover design. Participants completed two experimental sessions on separate days with a washout between sessions. All facets of the experiments were identical except the stimulation condition (DLPFC-tDCS or SHAM) that was given concurrent with the fatiguing contraction. The fatiguing contraction involved gripping a manipulandum with the index finger …

Comparison Of Male And Female Ultramarathon Runners, Kelsey Klug

UNLV Theses, Dissertations, Professional Papers, and Capstones

This research study investigates how specific running variables and demographic characteristics impact performance, or speed, for ultramarathon runners. These variables and characteristics include biological sex, cadence, age range, total distance of the race, duration of the race, years of running experience, total number of ultramarathon races ever completed, and number of races completed in the last twelve months. An ultramarathon is any running distance over a standard marathon or 42.2 kilometers. Participation in ultramarathons has increased by 345% since 2010, with females making up 23% of participants. No in-person data collection was necessary for this study. Participants were asked to …

Physiological And Biomechanical Response To Indoor Cycling With And Without The Ability To Sway, Alina P. Swafford

UNLV Theses, Dissertations, Professional Papers, and Capstones

Introduction: Bicycles have been around since the early 19th century. Since the invention of the bicycle, it has taken on several purposes. People have used bicycles as a means of transportation, leisure, exercise, and sport. The number of individuals who participate in a cycling event per year has increased. With the increase in popularity, research related to cycling has also increased. Research related to the physiology and biomechanics of cycling are of particular areas of interest. Balance is a crucial component of understanding why we cycle a certain way. Some research has labeled balancing on a bicycle as cycling sway. …

Effects Of Circadian Rhythm Disruption And Social Jetlag On The Cardiometabolic Adaptations To Exercise, Michael Bevan Dial

UNLV Theses, Dissertations, Professional Papers, and Capstones

Circadian rhythms lie within every tissue and cell and regulate cellular and tissue processes and functions based upon the time of day. Disrupting the circadian clock results in impaired tissue and organ activity and higher risk of cardiometabolic diseases. A common form of circadian rhythm disruption is social jetlag (SJL), which represents the misalignment of sleep and wake times on free days and work days (i.e. weekend). The time of day of exercise affects the adaptations that are derived from exercise. Within the heart muscle, disparate levels of exercise-induced hypertrophy, circadian clock gene expression, and mitochondrial content were all dependent …

The Influence Of Concussion History And Head Acceleration On Lower Extremity Function, Warren Forbes

UNLV Theses, Dissertations, Professional Papers, and Capstones

Sport-related concussions (SRCs) play a very debilitative role in athletics with between 1.7 – 3 million SRCs occurring annually (Clay et al., 2013; Zuckerman et al., 2015). This equates to upwards of 21.5 SRCs per 1000 athletic exposures. Research pertaining to SRC has received intense focus because of the substantial financial impact on the US healthcare system as well as the negative impact that SRCs have on the quality of life of athletes. Much of the research concerning SRC has been centered around management and ensuring adequate recovery from SRC-related symptoms. The current return to play (RTP) criteria from an …

Depression, Anxiety, And Estimated Cardiorespiratory Fitness In College Students, Christian Ison

UNLV Theses, Dissertations, Professional Papers, and Capstones

Depression and anxiety disorders are two common mental health conditions worldwide. College students are considered a high-risk population for the development of these conditions. Improved cardiorespiratory fitness (CRF) has been shown to decrease depression and anxiety risk, symptoms, and severity but this relationship and the extent to which improved CRF can reduce these risks has yet to be examined in the college student population. Validated and reliable non-exercise estimated cardiorespiratory fitness (eCRF) algorithms could be used to identify relationships and associations with depression and anxiety severity levels among college students. The purpose of this study was to assess eCRF and …

Validity Of Fitbit And Garmin Devices While Ascending And Descending Flights Of Stairs, Alan Garcia

UNLV Theses, Dissertations, Professional Papers, and Capstones

Two popular wearable fitness device brands are Fitbit and Garmin. The validity of Fitbit and Garmin’s wrist-worn devices in measuring step counts in various settings, such as walking up and down a staircase, is unclear. PURPOSE: To determine if four devices, the Fitbit Charge 2, Fitbit Versa 2, Garmin Fēnix 5 and Garmin Vívosmart HR+ record valid measures of step count when ascending and descending flights of stairs at three different speeds. METHODS: Twenty-eight participants (n=28) were tested individually. Two devices were randomly selected to be placed on each wrist. Participants climbed up and then down one, two, and three …

Oxygen Consumption In Highly Skilled Baseball Pitchers, Jesse Clingman

UNLV Theses, Dissertations, Professional Papers, and Capstones

The purpose of this study was to describe the physiological demands of highly skilled baseball pitchers during pitching, along with pitch metrics. Three junior college and three professional (n = 6) baseball pitchers participated in this study. Participants completed a graded exercise test (GXT) to volitional exhaustion to determine maximal oxygen consumption (VO2 max) and estimated body fat percentage, height, and body mass were measured on day one of testing. Next, participants faced live batters on a baseball field while wearing a portable metabolic analyzer (Cosmed K5) to measure respiratory gases including oxygen consumption (VO2) and carbon dioxide produced (VCO2) …

The Influence Of Transcranial Alternating Current Stimulation On Fatigue Resistance, Kayla De Guzman

UNLV Theses, Dissertations, Professional Papers, and Capstones

Fatigue is an exercise-induced reduction in muscle force generating capacity. Several studies have shown that some forms of non-invasive brain stimulation can increase the resistance to fatigue during sustained isometric contractions. The purpose was to determine the influence of transcranial alternating current stimulation (tACS) on the time to task failure (TTF) of a precision grip task in young adults. Twenty-two healthy young men and women participated in the study. The study utilized a randomized, double-blind, SHAM-controlled, within-subjects, crossover design. Each participant completed two experimental sessions (tACS, SHAM) with a 7-day washout period between sessions. Each session involved performance of a …

Physiological Effects Of A Traditional Active Warm-Up Versus A Passive Warm-Up During Submaximal Endurance Exercise, Vernice Ollano

UNLV Theses, Dissertations, Professional Papers, and Capstones

The purpose of this study is to investigate physiological responses during a traditional active warm-up and a passive warm-up consisting of wearing heated trousers during a submaximal endurance cycling workout. Participants included 10 cyclists/triathletes (3 females, 7 males; age: 48 ± 13 years old; mass: 157.9 ± 33.8 kg; height: 169.3 ± 8.65 cm; percent body fat: 25.3 ± 8.53 %) of at least 18 years of age who could continuously cycle for at least 120 minutes and had knowledge of their individual FTP. Experimental 1-day testing included a randomized crossover design where participants proceeded with two different protocols: an …

Musculoskeletal Injury Concealment In The Reserve Officers’ Training Corps, Joshua D. Wooldridge

UNLV Theses, Dissertations, Professional Papers, and Capstones

INTRODUCTION: Among service members, musculoskeletal injuries threaten military readiness and place a substantial burden on medical and financial resources. While musculoskeletal injuries (MSKIs) are a leading threat to military readiness, service members’ unwillingness to seek care constrains current prevention and surveillance efforts. A growing body of evidence shows US service members conceal a large proportion of injuries, especially in training environments. The Reserve Officers’ Training Corps is a critical training environment for future US military commissioned officers. Reserve Officers’ Training Corps (ROTC) is the largest commissioning source of new officers for the US military. ROTC cadets are college students concurrently …

Effect Of Metronome, Hospital Mattress, And Step Stool Usage On Chest Compression Rate And Depth During Cardiopulmonary Resuscitation (Cpr): A Collection Of Systematic Reviews And Meta-Analyses, Lee A. Doernte

UNLV Theses, Dissertations, Professional Papers, and Capstones

We conducted a systematic review and meta-analysis to evaluate the effects of: (1) a metronome, (2) a hospital mattress, and (3) a step stool on chest compression rate and chest compression depth during cardiopulmonary resuscitation (CPR). These studies comply with the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) checklist for searches and reporting systematic reviews. We utilized the Grading of Recommendations, Assessment, Development, and Evaluation (GRADE) to categorize the certainty of evidence.The first analysis focused on metronome usage while performing CPR. Our methods for this study were to conduct literature searches for studies comparing metronome usage to a …

Quantifying Road Bicycle Wheel Vibration, Kyle Petersen

UNLV Theses, Dissertations, Professional Papers, and Capstones

Understanding factors that influence wheel vibration may have practical applications for cyclists and manufacturers. However, a reliable method to measure these vibrations and tools to interpret the data are needed. PURPOSE: To establish a methodology to measure vibration of the road bicycle wheel and to quantify measured vibrations resulting from changes velocity, tire pressure, and surface roughness. METHODS: A single participant cycled on stationary cycle rollers with different tire pressure, speed, and surface roughness conditions. An accelerometer was mounted to rim of the front wheel. Data were analyzed in the frequency domain following a Fourier Transformation. Data were reduced by …

Balance Recovery Response In Community-Dwelling Adults With Unilateral Transtibial Amputation And The Potential Benefits Of A Weight-Shifting Balance Training Intervention, Hui-Ting Shih

UNLV Theses, Dissertations, Professional Papers, and Capstones

Previous studies have shown that individuals with various physical, sensory and neuromuscular impairments are at higher risks of falls. Individuals with unilateral transtibial amputation (UTTA) suffered from all these impairments, and tripping not surprisingly caused a considerable number of falls in this population. To study falls, researchers have to put participants in a well-protected environment and reproduce tripping fall scenarios. Furthermore, the perturbation delivery needs to be precise in terms of temporo-spatial timing. These features would ensure the quality of responses elicited and reproducibility of the results. Thus, in Chapter 2, we developed a treadmill-based perturbation delivery protocol and confirmed …

Direction Of Attentional Focus In Prosthetic Training: Current Practice And Potential For Improving Motor Learning In Individuals With Lower Limb Loss, Alexander Bonczyk, Maria Katrina Tillada Dimapilis, Sarah Partridge, Samantha Ruiz

UNLV Theses, Dissertations, Professional Papers, and Capstones

Objective: Adopting an external focus of attention has been shown to benefit motor performance and learning. However, the potential of optimizing attentional focus for improving prosthetic motor skills in lower limb prosthesis (LLP) users has not been examined. In this study, we investigated the frequency and direction of attentional focus embedded in the verbal instructions in a clinical prosthetic training setting.

Methods: Twenty-one adult LLP users (8 female, 13 male; 85% at K3 level; mean age=50.5) were recruited from prosthetic clinics in the Southern Nevada region. Verbal interactions between LLP users and their prosthetists (mean experience=10 years, range=4-21 years) during …