Kinesiology Commons^™

Glucose-Fructose Likely Improves Gastrointestinal Comfort And Endurance Running Performance Relative To Glucose-Only, P. B. Wilson, S. J, Ingraham

Athletic Performance Research

This study aimed to determine whether glucose-fructose (GF) ingestion, relative to glucose-only, would alter performance, metabolism, gastrointestinal (GI) symptoms, and psychological affect during prolonged running. On two occasions, 20 runners (14 men) completed a 120-min submaximal run followed by a 4-mile time trial (TT). Participants consumed glucose-only (G) or GF (1.2:1 ratio) beverages, which supplied ~1.3 g/min of carbohydrate. Substrate use, blood lactate, psychological affect [Feeling Scale (FS)], and GI distress were measured. Differences between conditions were assessed using magnitude-based inferential statistics. Participants completed the TT 1.9% (−1.9; −4.2, 0.4) faster with GF, representing a likely benefit. FS ratings were …

Describing The Prevalence And Awareness Of Sport-Related Concussion In University Intramural And Club Sport Participants, Makenzie L. Brown

Health, Human Performance and Recreation Undergraduate Honors Theses

Background: Concussion injuries are growing in number among athletes across the nation. The majority of concussion research to date focuses on collegiate and high school athletes. University athletes make up a small percentage of the student body population compared to the large number of students that participate in club and intramural sports. These students participate in the same sports, assume the same risks, and may experience the same adverse effects of concussion, often without appropriate medical oversight.

Purpose: The purpose of this study was to determine if concussion is a problem among intramural and club sport participants, if these participants …

Challenging The Discourse Of Untreatability For Borderline Personality Disorder: A Call For Comparative Research, Sandra H. Sulzer

Kinesiology and Health Science Faculty Publications

A diagnosis of Borderline Personality Disorder (BPD) often signals the quintessential “difficult patient” status to clinicians, with at least one scholar arguing the condition itself was created to name and group difficult patients. While patients who are deemed difficult are often dispreferred for care, does this have an impact on their overall status as medicalized patients who have successfully achieved a sick role? This study relies on (n = 22) in-depth interviews with mental health clinicians in the United States from 2012 to evaluate how they describe patients with BPD, how the diagnosis of BPD affects the treatment clinicians are …

The Kinetic Specificity Of Plyometric Training: Verbal Cues Revisited, Talin J. Louder, Megan Bressel, Eadric Bressel

Kinesiology and Health Science Faculty Publications

Plyometric training is a popular method utilized by strength and conditioning professionals to improve aspects of functional strength. The purpose of this study was to explore the influence of extrinsic verbal cueing on the specificity of jumping movements. Thirteen participants (age: 23.4 ± 1.9 yr, body height: 170.3 ± 15.1 cm, body mass: 70.3 ± 23.8 kg,) performed four types of jumps: a depth jump “as quickly as possible” (DJT), a depth jump “as high as possible” (DJH), a countermovement jump (CMJ), and a squat jump (SJ). Dependent measures, which included measurement of strength and power, were acquired using a …

Vitamin D Status And Bone Mineral Density In Female Collegiate Dancers And Cheerleaders, Tara Sue Kenny

UNLV Theses, Dissertations, Professional Papers, and Capstones

Introduction: An athlete’s bone mineral density reflects their cumulative history of energy availability, physical activity, genetic predisposition for bone health, and menstrual status, as well as nutritional, behavioral, and environmental factors.

Purpose: To determine if bone mineral density (BMD) and nutritional factors in bone health are different in two groups of female athletes who have comparable body size/weight requirements, but who engage in qualitatively different training regimens.

Methods: Participants were female collegiate athletes who were members of the UNLV Dance team (n=10) or Cheer team (n=9), ages 18-22. Participants vitamin D status was assessed by obtaining a finger prick sample …

Influence Of Benagene Supplementation In Conjunction With High Intensity Cycling Exercise, Wilson P. Simmons

Honors Theses

High intensity aerobic performance is determined by the body’s maximal ability to match lactate production and clearance rates, defined as the lactate threshold (LaTh). Intensities performed above the LaTh result in accumulation of lactate causing fatigue. In a double-blind experiment, using trained cyclists and triathletes, we investigated skeletal muscle adaptations that occurred following 28-days of Benagene supplementation (oxaloacetate). The testing protocol consisted of an initial cycle test (T1) to measure VO₂max, LaTh, respiratory exchange ratio (RER), power output (PO) and heart rate (HR). Testing began after a 15-min warm-up at 75W, beginning at 100W, increasing 30W each 3-min …

Misrepresentation Of Carbohydrate For Exercise: ‘It Is Time To Bust The Myth Of Physical Inactivity And Obesity: You Cannot Outrun A Bad Diet’, Patrick B. Wilson

Athletic Performance Research

The contention from Malhotra et al1 regarding the unimportance of carbohydrate for exercise is misguided. First, the reference they provide is an editorial2 that should not be viewed as high-quality evidence. Several oft-cited exercise studies showing benefits with high-fat diets simultaneously utilized carbohydrate restoration strategies,3 which involves “carbohydrate loading” after a high-fat diet. Thus, the evidence provided does not contradict the established belief that carbohydrate is an important fuel for endurance exercise. Second, the authors’ use of the term “carbohydrate loading” is misleading in this context. No public health organizations advocate a diet containing carbohydrate in amounts used in “carbohydrate …

Interaction Between Leg Muscle Performance And Sprint Acceleration Kinematics, Robert G. Lockie, Farzad Jalilvandv, Samuel J. Callaghan, Matthew D. Jeffriess, Aron J. Murphy

Research outputs 2014 to 2021

This study investigated relationships between 10 m sprint acceleration, step kinematics (step length and frequency, contact and flight time), and leg muscle performance (power, stiffness, strength). Twenty-eight field sport athletes completed 10 m sprints that were timed and filmed. Velocity and step kinematics were measured for the 0-5, 5- 10, and 0-10 m intervals to assess acceleration. Leg power was measured via countermovement jumps (CMJ), a five-bound test (5BT), and the reactive strength index (RSI) defined by 40 cm drop jumps. Leg stiffness was measured by bilateral and unilateral hopping. A three-repetition maximum squat determined strength. Pearson’s correlations and stepwise …

Individual Responses For Muscle Activation, Repetitions, And Volume During Three Sets To Failure Of High- (80% 1rm) Versus Low-Load (30% 1rm) Forearm Flexion Resistance Exercise, Nathaniel D. M. Jenkins, Terry J. Housh, Samuel L. Buckner, Haley C. Bergstrom, Kristen C. Cochrane, Cory M. Smith, Ethan C. Hill, Richard J. Schmidt, Joel T. Cramer

Kinesiology and Health Promotion Faculty Publications

This study compared electromyographic (EMG) amplitude, the number of repetitions completed, and exercise volume during three sets to failure of high- (80% 1RM) versus low-load (30% 1RM) forearm flexion resistance exercise on a subject-by-subject basis. Fifteen men were familiarized, completed forearm flexion 1RM testing. Forty-eight to 72 h later, the subjects completed three sets to failure of dumbbell forearm flexion resistance exercise with 80% (n = 8) or 30% (n = 7) 1RM. EMG amplitude was calculated for every repetition, and the number of repetitions performed and exercise volume were recorded. During sets 1, 2, and 3, one …

The Effect Of Foot Strengthening Exercise On Dynamic Function Of The Medial Longitudinal Arch In Runners: A Preliminary Report, Jarom Bridges

Theses and Dissertations

Therapeutic exercise has previously been shown to alter the static height of the medial longitudinal arch (MLA). It is still unknown, however, if these effects carry over into dynamic activities. PURPOSE: To determine if an 8-week foot strengthening exercise program increases static arch height and reduces vertical deformation of the MLA during mid-stance in running.METHODS: Thirty-four recreational runners (17 males, 17 females) have completed this ongoing study (age 24.06 ± 3.61 years, body mass 68.63 ± 12.95 kg, and height 173.34 ± 9.54 cm). To date, 22 subjects have been assigned to the control group (8 weeks of normal running) …

Assessing And Reporting Normative Data And Correlations In Adolescent Non-Professional Dancers, Alexandrea Holley

All NMU Master's Theses

Objective: The purpose of the current study was to gather normative data and determine if there was a correlation for multiple measures in adolescent dancers, specifically in relation to the hip joint including: balance, muscular strength, endurance, and flexibility. Design: Descriptive Correlation. Setting: Laboratory. Participants: Thirty-one female volunteers (mean age 12.52 ± 2.26), were recruited to participate in the university IRB approved study. Interventions: During the testing, the participants filled out a qualitative questionnaire, had their anthropometric data measured, and were assessed on flexibility of the hamstring. Functional measurements of muscular strength and endurance of the hip flexor, sacrum imbalance, …

What Are Mothers Doing While Bottle-Feeding Their Infants? Exploring The Prevalence Of Maternal Distraction During Bottle-Feeding Interactions, Rebecca Pollack Golen, Alison K. Ventura

Kinesiology and Public Health

The purpose of this study was to describe the extent to which mothers engage in distracting activities during infant feeding. Mothers reported engaging in other activities during 52% of feedings; television watching was the most prevalent activity reported. Further research on the impact of distraction on feeding outcomes is needed.

Blockade Of Tgf-Ss Signaling Through The Activin Type Iib Receptor With The Small Molecule, Sgi-1252, Jordan David Fuqua

Theses and Dissertations

Antagonism of the activin receptor signaling pathway represents a promising potential therapy for the muscular dystrophies and other muscle wasting disorders (i.e., cachexia or sarcopenia). Previous research has shown that antagonism of activin signaling promotes muscle growth, attenuates muscle wasting, and restores function in both wild type and diseased animals. Our laboratory has recently developed a novel small molecule (SGI-1252) that inhibits activin downstream (i.e., Smad2/3 phosphorylation) signaling. Purpose: In this study we determined how eight weeks of orally administered SGI-1252 affected TGF-ß signaling, whole body mass, individual limb muscle mass, and muscle fiber cross sectional area (CSA). Methods: Wild-type …

The Effect Of Aerobic Exercise Versus Inactivity On Nitric Oxide Concentration And Synthesis In An Elderly Population, Samantha Burton

Theses and Dissertations

CONTEXT: Nitric Oxide (NO) is an endothelial-derived vasoactive molecule that causes an increase in blood flow and oxygen delivery to tissue. A reduction in NO bioavailability has been found to occur in adults over the age of 60 and can be reversed pharmacologically by improving NO synthase (NOS) activity. Reversing these age-related changes with alternative interventions, such as aerobic exercise, has shown some promising results. OBJECTIVE: To quantify blood NO-bioavailability (as measured by blood nitrite levels) in a population of aerobically trained elderly men and compare these data to a group of age-matched, inactive individuals. In addition, we measured the …

The Influence Of Transcranial Random Noise Stimulation On Motor Skill Acquisition And Learning In A Modified Golf Putting Task, Lidio Lima De Albuquerque

UNLV Theses, Dissertations, Professional Papers, and Capstones

Transcranial random noise stimulation (tRNS) is a form of non-invasive brain stimulation (NIBS) that has been shown to increase motor performance in simple motor tasks. The purpose of the present study was to determine the influence of tRNS on motor skill acquisition and learning in a complex, modified golf putting task in young adults. Twenty-four (n = 12 per group) healthy young adult males were allocated to either a tRNS group or a SHAM stimulation group. Both groups performed 6 trials of the golf putting task in a baseline testing block, followed by 4 practice blocks of 15 trials. The …

The Validity Of Urine Color Self-Assessment As An Index Of Hydration In Males, Daniel Layne Nixon

Graduate Theses and Dissertations

While water intake is so important, there are few practical hydration assessment techniques for the general population to use on a daily basis. The present study examined the accuracy of self-assessed urine color (Ucol) as a potential hydration assessment tool. Male college aged subjects provided a urine sample into a custom built urinal (n=76; 1.79±0.76 m, 83.9±16.0 kg). The urinal contained a picture of the 1-8 color scale and a light and dark urine color scale. Subjects were asked to give their urine color estimation as a whole number integer and to estimate if their urine was light or dark. …

The Clinical Evaluation Between Overtraining Syndrome And Exercise-Related Immunity, Song-Young Park, Yi Sub Kwak, Seung-Jun Choi

Health and Kinesiology Faculty Publications

The present study was performed to analyze and review the physical and immune responses to overtraining syndrome in humans. Overreaching refers to the initial phage of overtraining syndrome and has been known as a physical fatigue which is mainly from metabolic imbalance. It has been known that overtraining also results in a loss of adaptability which may lead to an attenuation of exercise performance, sleeping disorder, central fatigue, neurohormonal changes, difficulty recovery to physical stress, and immunological changes. Additionally, overtraining syndrome is characterized by persistent fatigue, poor performance in sport due to the prolonged and strenuous physical training. Also, previous …

Step Activity And Stride-To-Stride Fluctuations Are Negatively Correlated In Individuals With Transtibial Amputation, Jenny A. Kent, Nicholas Stergiou, Shane Wurdeman

Journal Articles

Background

Variability occurs naturally from stride to stride in healthy gait. It has been shown that individuals with lower limb loss have significantly increased stride-to-stride fluctuations during walking. This is considered indicative of movement disorganization and is associated with less healthy movement. Given that lower limb prosthesis users perform on average less physical activity than able bodied individuals, the purpose of this study was to determine whether increased fluctuations also correspond to a reduced level of activity in daily life.

Methods

Twenty-two transtibial amputees wore an activity monitor (Actigraph, Pensacola, FL, USA) for 3 weeks. Lower limb kinematics during treadmill …

Changes In Intragastric Temperature Reflect Changes In Heat Stress Following Tepid Fluid Ingestion But Not Ice Slurry Ingestion, Christopher J. Stevens, Ben Dascombe

Journal of Human Performance in Extreme Environments

This study examined the effects of fluid and ice slurry ingestion on the relationship between intragastric temperature and rectal temperature in humans during physical activity. The purpose was to identify a technique to quantify changes in heat stress in situations when temperature probes are not feasible and when time constraints do not allow for a period long enough for an indigestible temperature capsule to reach the lower gastrointestinal tract. Eight moderately trained male runners inserted a rectal probe and ingested a telemetric capsule before randomized, crossover, pre-exercise ingestion of 7.5 mL x kg^-1 x BM^-1tepid fluid (22°C) …

Short-Term, High-Fat Diet Accelerates Disuse Atrophy And Protein Degradation In A Muscle-Specific Manner In Mice, Steven L. Roseno, Patrick R. Davis, Lance M. Bollinger, Jonathan J. S. Powell, Carol A. Witczak, Jeffrey J. Brault

Kinesiology and Health Promotion Faculty Publications

BACKGROUND: A short-term high-fat diet impairs mitochondrial function and the ability of skeletal muscle to respond to growth stimuli, but it is unknown whether such a diet alters the ability to respond to atrophy signals. The purpose of this study was to determine whether rapid weigh gain induced by a high-fat (HF) diet accelerates denervation-induced muscle atrophy.

METHODS: Adult, male mice (C57BL/6) were fed a control or HF (60 % calories as fat) diet for 3 weeks (3wHF). Sciatic nerve was sectioned unilaterally for the final 5 or 14 days of the diet. Soleus and extensor digitorum longus …

Influence Of Sports Drink Taste Preference On Consumption In Adult Recreational Soccer Players, Kiarash Molavi

Master's Theses and Doctoral Dissertations

Sports drinks provide nutrients that improve athletic performance. This study investigated whether a preference in taste leads to an increased consumption of a sports drink prior to and after an endurance event in athletes. Male amateur soccer players (n=16) first participated in a blind sensory evaluation to determine their taste preference for two (designated as Drink A and Drink B) similarly flavored sports drinks. Subjects were divided into two groups based on their taste preference for either drink. They then participated in 9 soccer matches and were presented with either Drink A, Drink B, or water (3 trials each) before …

Optic Flow Improves Adaptability Of Spatiotemporal Characteristics During Split-Belt Locomotor Adaptation With Tactile Stimulation, Diderik Jan Anthony Eikema, Jung Chien, Nicholas Stergiou, Sara Myers, Melissa Scott-Pandorf, Jacob J. Bloomberg, Mukul Mukherjee

Journal Articles

Human locomotor adaptation requires feedback and feed-forward control processes to maintain an appropriate walking pattern. Adaptation may require the use of visual and proprioceptive input to decode altered movement dynamics and generate an appropriate response. After a person transfers from an extreme sensory environment and back, as astronauts do when they return from spaceflight, the prolonged period required for re-adaptation can pose a significant burden. In our previous paper, we showed that plantar tactile vibration during a split-belt adaptation task did not interfere with the treadmill adaptation however, larger overground transfer effects with a slower decay resulted. Such effects, in …

Preliminary Efficacy And Feasibility Of Embedding High Intensity Interval Training Into The School Day: A Pilot Randomized Controlled Trial, S. A. Costigan, N. Eather, R. C. Plotnikoff, Dennis Taaffe, E. Pollock, S. G. Kennedy, D. R. Lubans

Research outputs 2014 to 2021

Current physical activity and fitness levels among adolescents are low, increasing the risk of chronic disease. Although the efficacy of high intensity interval training (HIIT) for improving metabolic health is now well established, it is not known if this type of activity can be effective to improve adolescent health. The primary aim of this study is to assess the effectiveness and feasibility of embedding HIIT into the school day. A 3-arm pilot randomized controlled trial was conducted in one secondary school in Newcastle, Australia. Participants (n = 65; mean age = 15.8(0.6) years) were randomized into one of three conditions: …

Biomechanical Investigation Of Elite Place-Kicking, Chase M. Pfeifer

Department of Mechanical and Materials Engineering: Dissertations, Theses, and Student Research

Many studies aim to understand the fundamentals of kicking commonly displayed by soccer players [4,6,10,16,17,18,24,25,28,29,30,34,36,38,40]. Of those studies, most are limited to a two-dimensional (2D) analysis using high-speed cameras for position tracking or utilizing electromyography to observe the activity of select muscles [4,6,18,25,29,36]. The few studies that investigate kicking using a three-dimensional (3D) model are limited in their position tracking capabilities and focus mainly on joint flexion potentials and foot speed.

This dissertation is a comprehensive biomechanical analysis (kinematic and EMG) of the field-goal place-kicking techniques of four elite kickers in American football. Data were compared and contrasted with ball …

Strength Training And Body Composition In Middle-Age Women, Rachelle Burrup

Theses and Dissertations

OBJECTIVE: The purpose of this study was to examine the relationship between strength training and body composition before and after controlling for several covariates. A cross-sectional study including 257 female subjects was conducted. METHODS: Subjects' level of involvement in strength training was determined via questionnaire. Body composition was assessed using dual energy X-ray absorptiometry (DXA). Diet was assessed using 7-d weighed food records. RESULTS: Strong linear relationships between subjects' level of involvement in strength training and body composition were identified. For each additional day of strength training reported per week, body fat was 1.32 percentage points lower (F = 14.8, …

Physical Characteristics Used To Predict Pole Vault Performance, Cody Bradly Michael Doerflein

Student Theses and Dissertations

PURPOSE: The purpose of this study was to identify specific physical characteristics of pole vaulters as they correspond to performance in the event. It was hypothesized that not only speed would correspond to performance, but skill and strength as well. METHODS: Twenty-three athletes were measured on six key physical assessments across one to two days. These assessments include a flying 15 m sprint, 1 RM back squat, backwards rollover to clearance, six-step straight pole drill for grip height, timed three m rope climb, and vertical jump. A multiple regression was used with pole vault performance as the criterion variable and …

Sedentary Behavior In Preschoolers: How Many Days Of Accelerometer Monitoring Is Needed?, Wonwoo Byun, Michael W. Beets, Russell R. Pate

Faculty Publications

The reliability of accelerometry for measuring sedentary behavior in preschoolers has not been determined, thus we determined how many days of accelerometry monitoring are necessary to reliably estimate daily time spent in sedentary behavior in preschoolers. In total, 191 and 150 preschoolers (three to five years) wore ActiGraph accelerometers (15-s epoch) during the in-school (≥4 days) and the total-day (≥6 days) period respectively. Accelerometry data were summarized as time spent in sedentary behavior (min/h) using three different cutpoints developed for preschool-age children (

Quadriceps Exercise Intolerance In Patients With Chronic Obstructive Pulmonary Disease: The Potential Role Of Altered Skeletal Muscle Mitochondrial Respiration, J. R. Gifford, Joel D. Trinity, Gwenael Layec, Ryan S. Garten, Song-Young Park, Matthew J. Rossman, Steen Larsen, Flemming Dela, Russell S. Richardson

Health and Kinesiology Faculty Publications

This study sought to determine if qualitative alterations in skeletal muscle mitochondrial respiration, associated with decreased mitochondrial efficiency, contribute to exercise intolerance in patients with chronic obstructive pulmonary disease (COPD). Using permeabilized muscle fibers from the vastus lateralis of 13 patients with COPD and 12 healthy controls, complex I (CI) and complex II (CII)-driven State 3 mitochondrial respiration were measured separately (State 3:CI and State 3:CII) and in combination (State 3:CI+CII). State 2 respiration was also measured. Exercise tolerance was assessed by knee extensor exercise (KE) time to fatigue. Per milligram of muscle, State 3:CI+CII and State 3:CI were reduced …

Prediction Of Maximal Oxygen Consumption From Rating Of Perceived Exertion (Rpe) Using A Modified Total-Body Recumbent Stepper, John P. Mcculloch, Douglas J. Lorenz, Michael A. Kloby, Matthew D. Love, Daniela G.L. Terson De Paleville Phd

International Journal of Exercise Science

International Journal of Exercise Science 8(4): 414-424, 2015. Exercise training is crucial to improve cardiovascular health and quality of life in people with spinal cord injuries (SCI). A key limitation is the lack of validated submaximal tests to evaluate and predict cardiovascular fitness in this population. The purpose of this study was to validate a submaximal test to predict maximal oxygen consumption for individuals with SCI. Ten able-bodied participants and two individuals with SCI completed a rating of perceived exertion (RPE)-based submaximal oxygen consumption test and a graded maximal oxygen consumption test on a NuStep T4 recumbent stepper. Prediction of …

Assessment Of Dietary Behaviors, Body Composition, And Cardiovascular Disease Risk Among College Club Rugby Team, Carly R. Macdougall, Gytis Balilionis, Svetlana Nepocatych

International Journal of Exercise Science

International Journal of Exercise Science 8(4): 403-413, 2015. The purpose of this study was to evaluate dietary behaviors, body composition, and potential cardiovascular disease (CVD) risk factors among college club rugby team players. 15 athletes completed demographics, three 24-hour dietary recalls, body composition and blood lipid profile assessments following an overnight fast. Mean ± SD age of participants was 20 ± 1 years; weight 81 ± 16 kg; BMI 25.7 ± 3.2 kg/m²; body fat 13 ± 5%; total cholesterol 133 ± 37 mg/dl; high-density lipoprotein 49 ± 18 mg/dl; low-density lipoproteins 77 ± 26 mg/dl; triglycerides 86 …