Exercise Science Commons^™

A Novel Approach To Estimation Of Patient-Specific Muscle Strength, David Walker, Allison Kinney, Benjamin J. Fregly, Thomas Wright, Scott Banks

Mechanical and Aerospace Engineering Faculty Publications

Current modeling techniques have been used to model the Reverse Total Shoulder Arthroplasty (RTSA) to account for the geometric changes implemented after RTSA. Though these models have provided insight into the effects of geometric changes from RTSA these is still a limitation of understanding muscle function after RTSA on a patient-specific basis. The goal of this study sought to overcome this limitation by developing an approach to calibrate patient-specific muscle strength for an RTSA subject.

Downhill Treadmill Running Does Not Induce Muscle Damage In Fvb Mice, Brenda Benson

Theses and Dissertations

Downhill treadmill running is a commonly used method to cause exercise-induced muscle damage, especially in rodents. Previous studies have evaluated which muscles in rats are more prone to damage. However research using downhill run mice (DHR) has shown some inconsistencies in which muscle is best analyzed for damage. Purpose: The purpose of this study was to quantify the damage in various muscles in a mouse after a single bout of DHR. Methods: Male FVB mice (5 months) were injected with Evans Blue dye (EBD) and then either used as control (CON) or run downhill (-16°) at 20 meters per minute …

Health-Related Fitness Results From Fitness Gram Tests, David Goodman, Candyce Young

Undergraduate Research Conference

No abstract provided.

Physiological Effects Of A Kettlebell Workout Versus A High-Resistance Circuit Workout, Brett Schreiber

Graduate Theses and Dissertations

Purpose: To compare the physiological effects of a single kettlebell workout to a high-resistance circuit workout in resistance-trained males. Methods: 12 resistance trained healthy males (age: 24 ± 2.97 years; height: 1.75 ± 0.064 m; body mass: 75.99 ± 8.46 kg) participated in this study. Participants had a familiarization visit and two subsequent experimental visits (kettlebell workout; circuit workout). The kettlebell workout consisted of 12-minutes of standardized kettlebell swings. The circuit workout consisted of three sets of 6 repetitions of smith machine squats, bench press, leg curl, and lat pulldown. Heart rate, rectal temperature, skin temperature, blood lactate, rating of …

Balance And Power In Older Adults With And Without A History Of Falls, Stephanie Michelle Gray

Graduate Theses and Dissertations

The purpose of this study was to observe the differences between power and balance in older adults over the age of 65 with and without falls. A total of 62 community dwelling older adults between the ages of 65 and 92 participated in the study. Two groups consisted of 25 fallers and 37 non-fallers. No statistical differences were found between groups on age, height, weight, or BMI. Testing included the Berg Balance Scale (BBS) to test balance, the Tendo Weightlifting Analyzer (TWA) during a sit-to-stand to test lower body power, and the Physical Activity Scale for the Elderly (PASE) to …

Stride Length-Speed Relationship During Body Weight Supported Running, Carmen Chona

UNLV Theses, Dissertations, Professional Papers, and Capstones

The purpose of this study was to determine if body weight support influences the stride length-speed relationship. Additionally, the purpose was to determine if impact characteristics of running are influenced by body weight support and speed. Subjects (n=10; 6 female, 4 male) volunteered to participate in this study. All subjects were injury free and were comfortable running on a treadmill for 30 minutes. Subjects ran on a lower body positive (LBPP, Alter-G, G-Trainer) treadmill for 4 conditions of body weight (100, 40, 30 and 20% of body weight) and 4 running speeds (100, 110, 120 and 130% of the preferred …

An Evaluation Of Kinematic Variables During Stance Phase Of A Training Endurance Run, Joshua Paul Bailey

UNLV Theses, Dissertations, Professional Papers, and Capstones

The purpose of the study was to evaluate kinematics of the lower extremity during the stance phase of an endurance training run. Fifteen participants (8 male, 7 female; 30.5 ± 8.4 years; 71.8 ± 11 kg; 1.73 ± 0.07 m) reported that they were currently signed up for, or planned on signing up for, an endurance race within the next six months of participation in the study (9 half marathon, 3 marathon, 1 triathlon, 2 21k trail run). All had a weekly running mileage greater than 20 miles (23.8 ±4.6 miles). Participants were required to complete the 15–kilometer training run …

Acute Testosterone Responses To Different Resistance Exercise Intensities, Robert Rietjens

UNLV Theses, Dissertations, Professional Papers, and Capstones

We investigated the acute testosterone response to four different resistance-training protocols. We observed testosterone levels pre-workout, immediately post-workout, and 60-minutes post-workout following a bout of upper body exercise at 70%,1 RM, 90% 1 RM, and lower body exercise at 70% 1 RM and 90% 1 RM. Total training volume was held constant but all amount of weight, sets, and reps were different. 10 healthy, male, resistance trained individuals volunteered for the study. The performed each exercise condition on separate days. Capillary blood was taken via finger prick at the time points specified above. Blood samples were analyzed via Accubind Testosterone …

Neural Reactivity To Visual Food Stimuli In The Morning And Evening: An Fmri Study In Women, Travis Daniel Masterson

Theses and Dissertations

Background: Visual food stimuli have been shown to influence desire to eat and may influence overall energy intake. The purpose of this study was to determine the influence, if any, that time of day has on the neural response to visual food stimuli, as measured by functional magnetic resonance imaging (fMRI). Methods: Using a crossover design, 15 healthy women were scanned using fMRI while presented with low- and high-energy pictures of food, once in the morning (6:30–8:30 am) and once in the evening (5:00–7:00 pm). Diets were identical on both days of the fMRI scans and were verified using weighed …

Effect Of Weight Loss Training Protocol Using Two Different Treadmills For Obese Individuals, Kristi Lynn Bercier

Boise State University Theses and Dissertations

The AlterG Anti-Gravity Treadmill allows individuals to walk at reduced body weight by using lower body positive pressure (LBPP). PURPOSE: The purpose of this study was to discern if the AlterG Anti-Gravity Treadmill was an effective tool to use in a weight loss walking program with obese individuals when compared to walking on a traditional treadmill. METHODS: Fifteen male (n = 3) and female (n = 12) obese participants, aged 18-55 years old with an average body mass index [BMI] ≥ 30 kg/m²), were randomly assigned to the AlterG treadmill (AlterG; n = 6) and traditional treadmill (TT; …

An Investigation Of The Sled Push Exercise: Quantification Of Work, Kinematics, And Related Physical Characteristics, James Hoffmann Jr

Electronic Theses and Dissertations

The purpose of this dissertation was to describe the basic characteristics of performing resisted sprint training using a push sled for the enhancement of sport performance. Specifically, this dissertation served to: 1.) quantify the frictional forces involved between a push sled and an AstroTurf® surface at 6 loads, 2.) derive an estimation of mechanical work performed during sled push training, 3.) outline the velocity characteristics of 3 sled pushing loads scaled to the athletes body mass for comparison against their sprinting ability and 4.) determine the interrelations of fitness characteristics to the ability to sprint under heavy resistance.

The following …

Academic Clustering Of Student-Athletes: A Case Study Of Football And Basketball Programs, Matthew Brett Rowland

Graduate Theses and Dissertations

This study explores the topic of academic clustering within the football and men's and women's basketball teams at the University of Arkansas. Given the prominence of collegiate sport in America, this paper examines a relatively understudied topic regarding student-athletes and education. Using a mixed methods approach, the topic of academic clustering is analyzed statistically, as well as through in-depth interviews with student-athletes and academic advisors in the athletic department. Statistical analysis shows significant over- and under-representation of student-athletes in certain University colleges (e.g., Fulbright College of Arts and Sciences, Walton College of Business, and College of Engineering), the presence of …

Effects Of Breathing Cool Air During Cycling Exercise In The Heat, Christian B. Ridings

Graduate Theses and Dissertations

INTRODUCTION: The purpose of this study was to establish the ability of the Core Cooler device to prevent rises in physiological heat strain of trained male cyclists during cycling exercise in the heat. METHODS: 15 healthy male cyclists cycled at 50-70% VO2max for 75 minutes in a heat chamber of 31°C & 55% RH while breathing through the Core Cooler device under three different conditions: 1:4 ratio without ice termed control (CN), 1:4 ratio with ice termed low intermittent (LI), and at 1:1 ratio with ice termed high intermittent (HI). Data collected every 15 minutes assessing intestinal temperature (TGI), heart …

Quantitative Ultrasound: Measurement Considerations For The Assessment Of Muscular Dystrophy And Sarcopenia, Michael O. Harris-Love, Reza Monfaredi, Catheeja Ismail, Marc R. Blackman, Kevin Cleary

Exercise and Nutrition Sciences Faculty Publications

Diagnostic musculoskeletal ultrasound has potential clinical utility in characterizing pathological muscle tissue. Sonography has been long proposed as method of assessing muscle damage due to neuromuscular diseases such as muscular dystrophy, and more recently, changes in body and tissue composition associated with muscle wasting disorders such as sarcopenia. The use of quantitative ultrasound as an adjunct diagnostic procedure has different technical challenges than the traditional use of ultrasound in clinical medicine. Operator-dependent technique and variation are critical considerations when obtaining measures of echointensity (i.e., tissue composition estimates) and tissue dimensions (i.e., muscle thickness) – key elements of the ultrasound assessment …

Comparison Of Kinematics And Accuracy Of Overhand American Football Throwing, Cale Anderson, Sarah Breen, Randall L. Jensen

Conference Presentations

No abstract provided.

Changes In Running Gait Parameters During A 161 Km Trail Race, Sarah Breen, Mitchell Stephenson, Randall L. Jensen, Scott Drum

Conference Presentations

No abstract provided.

The Effects Of Squat Depth On Lower Extremity Joint Kinetics, Acl Loading, Pcl Loading, Tibiofemoral Compressive Forces And Activations Of Eight Lower Extremity Muscles, Zachary A. Sievert

Human Movement Studies & Special Education Theses & Dissertations

Performing resistance training exercises are important in many facets oflife. Resistance training can be used from elite athletes preparing for the Olympics to the average person exercising for overall health. The squat is a common training exercise that can be utilized to improve lower extremity strength and performance. There has been much debate on the effects of squatting depth on lower extremity joint kinetics and kinematics. Therefore the purpose of this thesis is to examine the effects of depth and load on the muscle activation of eight lower extremity muscles and three-dimensional (30) joint moments about the right knee, hip …

The Effect Of Chronic Mild To Moderate Neck Pain On Neck Function As Measured By Joint Reposition Error And Tactile Acuity Of The Cervical Dermatomes, Kelly Martell Cheever

Theses and Dissertations

The purpose of this study was to observe the joint reposition error and tactile acuity of patients with chronic mild to moderate neck pain and compare those values to healthy controls to further investigate the effect of neck pain on neck function and the need for sensorimotor training in patients with chronic neck pain. In spite of some inconsistencies in the literature and methodology, both the two-point discrimination test and the joint reposition error test can give clinicians valuable, inexpensive and quick objective data that can be used in the diagnostic portion of an examination as well as in designing …

Validity Of Posturescreen Mobile® In The Measurement Of Standing Posture, Breanna Cristine Berry Hopkins

Theses and Dissertations

Background: PostureScreen Mobile® is an app created to quickly screen posture using front and side-view photographs. There is currently a lack of evidence that establishes PostureScreen Mobile® (PSM) as a valid measure of posture. Therefore, the purpose of this preliminary study was to document the validity and reliability of PostureScreen Mobile® in assessing static standing posture. Methods: This study was an experimental trial in which the posture of 50 male participants was assessed a total of six times using two different methods: PostureScreen Mobile® and Vicon 3D motion analysis system (VIC). Postural deviations, as measured during six trials of PSM …

The Acute Effects Of Patterned Electrical Neuromuscular Stimulation On Quadriceps Torque Production And Motor Unit Recruitment, John A. Derington

Theses and Dissertations

Electric muscle stimulation (EMS) has been widely used in the rehabilitation of musculoskeletal injuries. Patterned electrical neuromuscular stimulation (PENS), a specific form of EMS, has been developed to better educate muscles to contract properly. The physiological efficacy of PENS has not been quantifiably identified. OBJECTIVES: The aim of this study is to determine the acute effect of one PENS training session (3 sets of 10 1-sec repetitions) on maximal isometric knee extensor (MVIC) torque production and surface EMG (sEMG) in healthy nonathlete college students. DESIGN: A randomized repeated-measures design was used in this study. METHODS: Twenty-two male college students participated …