Kinesiology Commons^™

Identification Of Chronic Postural Stability Impairments Associated With History Of Concussion, Nicholas Reilly

Rehabilitation Sciences Theses & Dissertations

Concussion is the most common form of traumatic brain injury (TBI). However, there is a disproportionate level of understanding between the acute and chronic impairments associated with traumatic brain injury. Specifically, problems maintaining balance during standing and walking are cardinal signs of acute concussion, but the temporal extent to which postural control deficits remain following the initial injury are not well defined or understood. The purpose of the projects composing this dissertation was to examine the long-term effects of a prior history of concussion on static (i.e. standing) and dynamic (i.e. gait) postural control. To address this, healthy adults aged …

Predictions Of Knee Joint Contact Forces Using Only Kinematic Inputs With A Recurrent Neural Network, Kaileigh Elisabeth Estler

Human Movement Sciences Theses & Dissertations

BACKGROUND: Knee joint contact (bone on bone) forces are commonly estimated using surrogate measures such as external knee adduction moments (with limited success) or musculoskeletal modeling (more successful). Despite its capabilities, modeling is not optimal for clinicians or persons with limited experience and knowledge. Therefore, the purpose of this study was to design a novel prediction method for knee joint contact forces that is equal or more accurate than modeling, yet simplistic in terms of required inputs. METHODS: This study included all six subjects’ (71.3±6.5kg, 1.7±0.1m) data from the opensource “Grand Challenge” datasets (simtk.org) and two subjects from the "CAMS" …

Determinants Of Support And Participation In A Major Sport Event Referendum, Melody Johnston, Michael Naylor, Geoff Dickson, David P. Hedlund, Timothy Kellison

Kinesiology Faculty Publications

In recent years, referenda have been used to inform decisions to bid on major sport events. Recognising referenda as a means to engage a community in a major sport event, the purpose of this study was to investigate the determinants of referenda support and participation intention. A sample of 603 New Zealanders completed a questionnaire a) the intention to participate in such a referendum. Based on exploratory factor analysis assessing b) their support for a referendum on their city bidding to host the Commonwealth Games, and multinomial logistic regression, the key findings are that political cynicism, civic duty, event status …

Sleep Quality And Prevalence Of Anxiety And Depression In Young Adults With Concussion History, Jessica Barrack

Theses and Dissertations

Background: Concussions are a growing public health concern, and emerging long-term health risks may negatively impact an individual’s quality of life. With concussions, there can be a multitude of signs and symptoms, but frequent long-term sequelae of concussions including mood disturbances (e.g. trait anxiety and depression) and sleep disturbances (e.g. difficulties initiating and maintaining sleep) are given less attention. Few clinicians address mood and sleep disturbances in their concussion assessment and management plan, potentially placing individuals at risk for prolonged disturbances beyond recovery. Purpose: To examine the relationship between sleep disturbances (sleep quality) and mood disturbances (trait anxiety and depression) …

Gait Variability Is Affected More By Peripheral Artery Disease Than By Vascular Occlusion, Hafizur Rahman, Iraklis Pipinos, Jason M. Johanning, Sara A. Myers

Journal Articles

Background

Patients with peripheral artery disease with intermittent claudication (PAD-IC) have altered gait variability from the first step they take, well before the onset of claudication pain. The mechanisms underlying these gait alterations are poorly understood.

Aims

To determine the effect of reduced blood flow on gait variability by comparing healthy older controls and patients with PAD-IC. We also determined the diagnostic value of gait variability parameters to identify the presence of PAD.

Methods

A cross-sectional cohort design was used. Thirty healthy older controls and thirty patients with PAD-IC walked on a treadmill at their self-selected speed in pain free …

Analyses Of Countermovement Jump Performance In Time And Frequency Domains, Zhanxin Sha, Zhaoxian Zhou, Boyi Dai

Faculty Publications

This study aimed to analyze counter-movement jump (CMJ) performance in time and frequency domains. Fortyfour Division I American football players participated in the study. Kinetic variables were collected from both dominant and non-dominant legs using two force plates. Normalized peak power, normalized net impulse, and normalized peak force significantly correlated with jump height (r =.960, r =.998, r =.725, respectively with p <.05). The mean frequency component was significantly correlated with CMJ performance (r =.355 with p <.05). The reliability of the frequency variables was higher than the time domain variables. Frequency domain variables showed weaker correlations with jump height compared with time domain variables. Frequency domain analysis provides frequency components, which represent the rate of energy transmission from the eccentric phase to the end of the push-off phase. Frequency component information may provide additional information for the analyses of CMJ performance for athletes.

How The Covid-19 Closures And Restrictions Were Perceived By University Students As It Relates To Physical Activity Behaviors, Madison Brown

Theses and Dissertations

The purpose of this study was to examine how COVID-related closures and restrictions were perceived and received by students at a Midwestern university. Data were collected via an online survey that was distributed two weeks prior to the fall 2020 semester. Participants were 426 student volunteers. Eighty-one percent of respondents planned to return to campus in fall 2020. More than half had been physically active since the onset of COVID-19, primarily at home or outside. Most students reported willingness to attend the university student fitness center if masks were required at entry or during exercise (60%), although fewer were willing …

Coconut Inflorescence Sap Enhances Exercise Performance And Plasma Antioxidant Status In Young Active Men, Ashish Joseph, Svenia P. Jose, Bintu T. Kalyan, Renny R. Mammen, I. M. Krishnakumar, Bradley S. Fleenor, Ratheesh Mohan

Kinesiology and Health Promotion Faculty Publications

Purpose
Nutrition has been increasingly recognized as a key component to optimal sports performance. Though several botanical agents have been reported to possess ergogenic potential, there exists a great interest for tasty and safe natural substances as performance boosters. In the present contribution, the ergogenic potential of a novel powder form of coconut inflorescence sap (CSP) was investigated for the first time.

Method
Out of the fourteen participants recruited, twelve recreationally active men completed the single-blinded, placebo-controlled, crossover study for 8 weeks. Running based anaerobic sprint test (RAST) and 2.4 km running test were performed as anaerobic and aerobic tests, …

Becoming One With Nature: A Nature Intervention For Individuals Living With Cancer Participating In A Ten-Week Group Exercise And Wellness Program, Samantha L. Morris, Ian Newhouse, Tracey Larocque, Kelly-Jo Gillis, Leanne Smith, Elizabeth K. Nisbet

International Journal of Exercise Science

International Journal of Exercise Science 14(3): 498-518, 2021. Positive outcomes for psychological and physiological health have resulted from a nature experience. However, evidence is limited for nature-based interventions and their effect on a cancer population. The purpose of this mixed-methods study was to determine if incorporating the One Nature Challenge (ONC) into a ten-week group exercise program (WE-Can) for individuals living with cancer could offer additional psychological and/or physiological benefits to those previously observed in WE-Can. For this study, two separate ONCs were implemented throughout two seasons (summer and winter) to formulate a ONC group (n = 18; 60 ± …

Leucine Supplementation Does Not Improve Muscle Recovery From Resistance Exercise In Young Adults: A Randomized, Double-Blinded, Crossover Study, Jeferson L. Jacinto, João Pedro Nunes, Alex S. Ribeiro, Juliano Casonato, Mirela C. Roveratti, Bruna N. S. Sena, Edilson S. Cyrino, Rubens A. Da Silva, Andreo F. Aguiar

International Journal of Exercise Science

International Journal of Exercise Science 14(2): 486-497, 2021. This study aimed to investigate the effects of free leucine supplementation on muscle recovery from resistance exercise (RE) in young adults. Fourteen untrained subjects (23.9 ± 3.6 years old) underwent RE sessions (leg press and hack squat: three sets of 8-12 reps at 70% 1RM) supplemented with leucine (LEU: two daily doses of 3g) or a placebo (PLA), separated by a seven-day washout period. Following each occasion, participants were evaluated in three subsequent days (24h, 48h, and 72h) for muscle recovery via a repetition-to-failure test. The following markers were assessed: repetition performance, …

Transversus Abdominis And Lumbar Multifidus Thickness Among Three Dance Positions In Argentine Tango Dancers, Eleni Gouridou, Eleftherios Kellis, Ermioni Katartzi, Nikolaos Kofotolis

International Journal of Exercise Science

International Journal of Exercise Science 14(1): 473-485, 2021. Core muscle function is considered a risk factor for low back pain appearance in dancers. The purpose of this study was to examine the transversus abdominis and lumbar multifidus thickness among Argentine Tango dancers in different functional dance positions. A secondary purpose was to compare muscle thickness at rest and contraction between dancers and untrained participants. Ten trained dancers and ten untrained women aged 33.8 ± 6.09 years participated in this study. Using ultrasonography, the transversus abdominis and lumbar multifidus muscle thickness were measured at rest and during contraction in three different …

Exercise And Bone: Older Adults, Type Ii Diabetes, And Ketogenic Diets, Matthew Casey Scott

LSU Doctoral Dissertations

Exercise is a well-appreciated modulator of bone and has other positive implications for overall fitness and health. The purpose of this dissertation was to determine the effects of exercise on bone in conjunction with other known modifiers: old age, type II diabetes mellitus (T2DM), and ketogenic diets. The three studies discussed in this dissertation utilized multiple methods of measuring bone to examine the effect of exercise on bone in individuals with type II diabetes, rodents consuming a ketogenic diet, and older adults participating in a novel resistance training intervention. The first study examined the effects of a 9-month resistance, aerobic, …

Efficacy Of The Opensim Simulator As A Tool To Detect Changes In Gait: A Peripheral Artery Disease Model, Cody Anderson, Hafiz Rahman, Irakis Pipinos, Jason Johanning, Sara Myers

UNO Student Research and Creative Activity Fair

INTRODUCTION

Peripheral Artery Disease (PAD) is characterized by atherosclerotic plaques in the leg arteries. A common treatment for PAD is supervised exercise training [1]. However, gait is not fully restored following supervised exercise training (SET). Musculoskeletal simulation may provide insight into how muscle activation changes following SET contributed to persistent gait alterations.

METHODS

Kinematic and kinetic data from overground walking of patients with PAD (n=12), before and after a 6-month exercise intervention, was used as input for musculoskeletal modeling (OpenSim). The subjects in our sample were subdivided based on the location of ischemic muscle pain, as reported on the San …

Development Of A Modular Activity-Specific Upper Limb Prosthesis, Rahul Raj

UNO Student Research and Creative Activity Fair

The use of activity-specific upper-limb prosthesis helps children with upper-limb loss to engage in functional and recreational activities, such as music and sports. The purpose of this study was to develop a modular activity-specific prosthesis and develop a remote-fitting procedure. We evaluated patient satisfaction after using the device for 8 weeks and evaluated anthropometric and range of motion (ROM) measurements of the residual limb after use of the prosthesis. We enrolled 7 children with unilateral trans-radial amputations between 7 and 12 years of age. The modular activity- specific prosthesis was specifically designed for playing musical instruments and sports. A survey …

A Systematic Review: Long Range Correlations In Running Gait, Mr. Taylor Wilson

UNO Student Research and Creative Activity Fair

Long range correlations (LRCs) are apparent in human walking and running gait and are indicative of a healthy system. A systematic review (SR) was completed to determine the typical LRC patterns in running. 20 articles were included in the SR. LRCs in running gait tend to be similar to the LRCs in walking gait, with fatigue contributing to a negative effect on the LRCs.

This SR could have implications on training guidelines for coaches and physical therapy methods to increase the LRCs in running gait for healthier functioning. More research is needed to determine how LRCs depend on running surface …

Biomechanical Assessment Of The Lower Extremity Following An Unexpected Ankle Perturbation, Emilia Gladys Schempp

Theses and Dissertations

A deeper understanding of the response to an unexpected ankle perturbation could help provide insight into ankle sprain injury avoidance strategies. This study compared lower extremity electromyographic and kinematic measures between unexpected ankle perturbation and normal walking conditions, including muscle amplitudes and reaction times, dominant limb joint angles and velocities. Trial conditions included a walking control condition, unexpected 30° inversion, and unexpected 18° combined inversion and plantarflexion. With randomized trials, 20 healthy volunteers walked along the custom-built walkway that unexpectedly released into the described ankle perturbations. Significant differences were found for peak and average EMG of the peroneus longus and …

The Effect Of Load On The Kinetics And Kinematics Of The Lower Extremity During Landing, Michael Akira Sullivan

Theses and Dissertations

Purpose: To understand the differences in the lower extremity kinetics and kinematics as load increases during jump landings. Methods: Ten male participants (20.4 years ± 2.41 years, 108.8kg ± 14.02kg) took part in two testing sessions. The first testing session involved testing each participant’s 1-repetition max in the hexagonal barbell deadlift. The second testing session involved the data collection of the jumping trials for each participant. Participants performed their countermovement jumps under seven randomized conditions. Six of the conditions involved the hex bar using loads equivalent to 10, 20, 30, 40, 50, and 60% estimated 1-repetition max of the hexagonal …

The Effect Of Uneven Terrain Conditions During Shod Vs. Barefoot Running, Jan Urbaczka, Julia Freedman Silvernail, Jaroslav Uchytil, Daniel Jandacka

Kinesiology and Nutrition Sciences Faculty Publications

Background: The majority of research on barefoot running focuses on acute changes in altering footwear without regard to the runner's experience with barefoot or minimalist footwear running. Objective: The objective of this study was to compare the effect of footwear (standard cushioned running shoes, barefoot) and running surface (flat surface, uneven terrain) on gait in experienced runners using minimalist shoes. Methods: Terrain running was simulated by three custom-made mats with randomly placed firmly attached stones. Seven experienced trail runners participated in this study. All participants were forefoot strikers. Participants underwent three-dimensional kinematic and kinetic analysis consisting of five running trials …

Nox2 Inhibition Regulates Stress Response And Mitigates Skeletal Muscle Fiber Atrophy During Simulated Microgravity, John M. Lawler, Jeffrey M. Hord, Pat Ryan, Dylan Holly, Mariana Janini Gomes, Dinah Rodriguez, Vinicius Guzzoni

Health & Human Performance Faculty Publications and Presentations

Insufficient stress response and elevated oxidative stress can contribute to skeletal muscle atrophy during mechanical unloading (e.g., spaceflight and bedrest). Perturbations in heat shock proteins (e.g., HSP70), antioxidant enzymes, and sarcolemmal neuronal nitric oxidase synthase (nNOS) have been linked to unloading-induced atrophy. We recently discovered that the sarcolemmal NADPH oxidase-2 complex (Nox2) is elevated during unloading, downstream of angiotensin II receptor 1, and concomitant with atrophy. Here, we hypothesized that peptidyl inhibition of Nox2 would attenuate disruption of HSP70, MnSOD, and sarcolemmal nNOS during unloading, and thus muscle fiber atrophy. F344 rats were divided into control (CON), hindlimb unloaded (HU), …

Comparison Of Countermovement And Squat Jumps Performance In Recreationally Trained Males, Paul Donahue, Samuel Wilson, Charles Williams, Christopher Hill, John Garner

International Journal of Exercise Science

International Journal of Exercise Science 14(1): 462-472, 2021. The vertical jump has been shown to be an effective tool in assessing neuromuscular fatigue. The two most common iterations of the vertical jump are the countermovement and squat jumps. This investigation sought to identify if differences exist between the two jumping strategies with regard to electromyography (EMG) and kinetics in a group of recreationally trained males. Twenty-two participants completed one experimental session, where three countermovement (CMJ) and three squat jumps (SJ) were performed using a counterbalanced within-subject design. Jump performance was evaluated with data obtained using a force platform. Additionally, EMG …