Kinesiology Commons^™

Is Postural Control During Unstable Sitting A Proxy Measure For Determinants Associated With Lumbar Stability?, Christian Larivière, Richard Preuss, Daniel Ludvig, Sharon M. Henry

Études primaires

Abstract

The aim of this study was to test whether determinants associated with lumbar stability can predict performance during unstable sitting (trunk postural control - TPC). If confirmed, unstable sitting could be viewed as a proxy measure for these determinants. Wobbling chair motion was measured in 58 subjects with an inertial sensor, and six outcomes were computed (mean frequency and velocity, frequency dispersion, two variables from the sway density analysis and Lyapunov exponent - short interval) to represent TPC performance. Subjects also performed five other trunk neuromuscular tests to quantify the thickness of back and abdominal muscles and …

Subject-Specific Regression Equations To Estimate Lower Spinal Loads During Symmetric And Asymmetric Static Lifting, F. Ghezelbash, A. Shirazi-Adl, Z. El Ouaaid, A. Plamondon, N. Arjmand

Études primaires

Workplace safety assessment, personalized treatment design and back pain prevention programs require accurate subject-specific estimation of spinal loads. Since no noninvasive method can directly estimate spinal loads, easy-to-use regression equations that are constructed based on the results of complex musculoskeletal models appear as viable alternatives. Thus, we aim to develop subject-specific regression equations of L4-L5 and L5-S1 shear and compression forces during various symmetric/asymmetric tasks using a nonlinear personalized finite element musculoskeletal trunk model. Kinematics and electromyography (EMG) activities of 19 young healthy subjects were collected during 64 different symmetric/asymmetric tasks. To investigate the reliability and accuracy of the musculoskeletal …

Influence Of Strength Level On The Acute Post-Activation Performance Enhancement Following Flywheel And Free Weight Resistance Training, Borja Sañudo, Moisés De Hoyo, Guy Gregory Haff, Alejandro Muñoz-López

Research outputs 2014 to 2021

© 2020 by the authors. Licensee MDPI, Basel, Switzerland. This study aimed to compare the post-activation potentiation performance enhancement (PAPE) response to the acute inertial flywheel (FW) and free weight resistance training (TRA) on subsequent countermovement jump (CMJ) and sprint performance (10 m sprint). This study used a randomized crossover design including twenty-eight healthy males that were divided into strong (relative one-repetition maximum (1RM) back squat > 2.0 × body mass) and weak (relative 1RM back squat < 2.0 × body mass) groups. All participants performed the following: (a) three reps at 90% of their 1RM back squat (TRA) and (b) three reps on an inertial FW (plus one repetition to initiate flywheel movement) with an intensity that generated a mean propulsive velocity equal to that achieved with 90% of the 1RM back squat. Before and after the conditioning activity, participants performed two CMJs and two 10 m sprints. Within-group analyses showed significantly greater CMJ (d > 0.9, p < 0.001) and sprint performance (d > 0.5, p < 0.05) in the FW and the TRA group. Between-group analysis showed that sprint changes were significantly greater in the FW-strong group when compared with the TRA (F1,18 = 5.11, p = 0.036, η2p = 0.221—large) group. These results suggest that using a squat activation protocol on a FW may lead to an acute positive effect on jump and sprint performance, especially in stronger individuals.

Reduced Frontopolar Brain Activation Characterizes Concussed Athletes With Balance Deficits, I. Helmich, J. Coenen, S. Henckert, E. Pardalis, S. Schupp, H. Lausberg

Exercise and Sport Studies: Faculty Publications

Objectives: Athletes with sport-related concussions (SRC) often demonstrate deficits in postural stability. Lower cerebral blood flow in frontal cortices has been documented in athletes with symptoms after SRC, however, it is unclear if functional brain oxygenation during postural control tasks is reduced in symptomatic athletes after SRC in the same manner. We therefore compared brain oxygenation patterns in frontal cortices of symptomatic and asymptomatic athletes with SRC during postural control tasks with the hypothesis that symptomatic athletes are characterized by reduced functional brain oxygenation during postural control. Methods: 62 concussed athletes (n = 31 symptomatic, n = 31 asymptomatic) were …

Comparing Knee Joint Mechanics Across Phases Of The Menstrual Cycle, Bethany Kilpatrick

Cal Poly Humboldt theses and projects

Anterior cruciate ligament (ACL) injuries are among the most commonly occurring knee injury. Compared to men in the same sports, females are two to eight times at higher risk for ACL injury. Research suggests that hormone fluctuations across the menstrual cycle (MC) play a crucial role in ACL injuries due to their effect on tendons and ligament's mechanical properties. PURPOSE: To examine knee joint laxity during dynamic movements across three-time points of the MC. METHODS: Seven young, healthy females with regular MCs performed three jump-landing tasks (double leg depth jump, single-leg lateral jump, and single-leg forward jump) across the early-follicular, …

Sensorimotor Function In Progressive Multiple Sclerosis, Jules D. Miehm, John Buonaccorsi, Jongil Lim, Sumire Sato, Caitlin Rajala, Julianna Averill, Farnaz Khalighinejad, Carolina Ionete, Stephanie L. Jones, Jane A. Kent, Richard E.A. Van Emmerik

Exercise and Sport Studies: Faculty Publications

Background: A sensitive test reflecting subtle sensorimotor changes throughout disease progression independent of mobility impairment is currently lacking in progressive multiple sclerosis.

Objectives: We examined non-ambulatory measures of upper and lower extremity sensorimotor function that may reveal differences between relapsing–remitting and progressive forms of multiple sclerosis.

Methods: Cutaneous sensitivity, proprioception, central motor function and mobility were assessed in 32 relapsing–remitting and 31 progressive multiple sclerosis patients and 30 non-multiple sclerosis controls.

Results: Cutaneous sensation differed between relapsing–remitting and progressive multiple sclerosis at the foot and to a lesser extent the hand. Proprioception function in the upper but not the lower …

Sensory Integration And Its Role In Behavioral Plasticity In Children Diagnosed With Autism Spectrum Disorder, Clarissa Diaz

Open Access Theses & Dissertations

Although commonly characterized by communicative and social impairments, Autism Spectrum Disorder (ASD) presents a number of developmental deficits related to movement planning and action. The extent of these deficits to the entire neuromuscular system, as well as the individual input/output loops are still not well understood. Given the dynamic interplay between our plans, actions and outcomes lay the foundation for later mature motor behavior, it is critical to understand the unique motor learning processes these nervous systems face while a higher level of training plasticity may be present. A recent study examined the kinematics (acceleration, velocity, smoothness, etc.) of upper …

The Effect Of Curriculum- And Classroom-Based Physical Activity Breaks On Academic Performance In Elementary School Children In Southern New Mexico, Sephonnie S. Elliss

Open Access Theses & Dissertations

Research has provided strong evidence for the many health benefits of exercise (e.g. decreased risk of heart disease, diabetes, osteoporosis, sleep apnea, falls). Despite the plethora of evidence, most Americans do not meet the Surgeon General's recommendation of achieving 150 minutes of moderate-to-vigorous physical activity (PA) per week. Compounding the problem for children is the fact that although most American kids are enrolled in school for 30 or more hours per week, making schools a prime location to teach modes of physically active health habits, schools have instead increasingly become places that promote sedentary behavior as greater emphasis has been …

The Acute Effects Of Manual Resistance On Ballistic Bench Press Performance, Matthew Paul Gonzalez

Open Access Theses & Dissertations

Heavy conditioning activities (CA) during warm-ups has been found to improve subsequent movements. However, a problem with heavy CAs is the need for specialized equipment. Manual Resistance (MR) is accommodating resistance in which traditional exercises are replicated using resistance from a partner. This modality has led to improved muscular strength and endurance; however, the acute effects of MR have not been examined. Purpose: The purpose of this study was to determine if MR can lead to improvements in ballistic bench press (BBP) performance. Methods: Two subjects (age = 22.50 ± 0.71 years, weight = 97.88 ± 43.95 kg, BMI = …

A Comparative Assessement Of Discrete And Reciprocal Design In Children With Autism Spectrum Disorder, Jallycia Rene Pearson

Open Access Theses & Dissertations

Although typically diagnosed through social impairment and repetitive stereotypical behavior, recent work in the last decade has shown motor irregularities across the autism spectrum. With regard to upper extremity coordination, studies have agreed that children on the Autism spectrum present overall decreased performance compared to their neurotypical peers but fail to find commonality on the locus of this error. For example, studies have highlighted reaction time, arm trajectory as well as corrective sub-movements as areas in need of improvement. One possible reason for the conflicting results could be related to the nature of the task employed, e.g. discrete vs reciprocal …

The Effects Of A 6-Week Controlled Whole-Body Vibration Training Program In Reducing Falls Risk Among Healthy Older Adults, Fabricio Saucedo Jr.

Open Access Theses & Dissertations

Falling is the second leading cause of accidental or injury-related death in the aging population worldwide and a leading cause of serious injury. Whole-body vibration (WBV) training has been implemented as a way to improve functional performance among the elderly and reduce the falls risk. The purposes of this study were: 1) examine to what extent a six-week course of WBV training reduced falls risk and improved fall outcomes in response to slips, and 2) examine whether the benefits of WBV training could be retained at least 2 months after the completion of the entire training session. A total of …

Effects Of Neuromuscular Electrical Stimulation On Insulin Sensitivity And Glycemic Control: A Systematic Review And Meta-Analysis, Michael James Sanchez

Open Access Theses & Dissertations

Background: Neuromuscular electrical stimulation (NMES) is an effective method to induce involuntary muscle contraction, particularly for populations that are more prone to physical incapacities and metabolic disease.

Purpose: To evaluate existing evidence to determine the effectiveness of NMES on glycemic control and insulin sensitivity.

Methods: Electronic search consisted of MEDLINE (PubMed), EMBASE, Cochrane Library, Google Scholar, and Web of science to identify existing original research studies that investigated the effects of NMES on glycemic control and insulin sensitivity in humans. Studies that met inclusion criteria for the systematic review were then considered for meta-analysis if the studies were designed as …

Association And Predictive Abilities Of Jump And Throw Tests To Track Performance In Division I Athletes, Nicholas R. Cubillos

Open Access Theses & Dissertations

Sprinting jumping, and throwing are of the most vital abilities in track & field. Although various studies investigated relationships among these three aspects, there is limited empirical evidence as to how they may be correlated and predictive towards track performance. Purpose: To determine associations and predictive abilities of four field performance tests among a static (Accel30) and flying (Fly30) 30-meter sprint. This study also aimed to ascertain associations of kinematic and kinetic components of all field assessments to Accel30 and Fly30 sprint times. Methods: 23 subjects (18-25 years, 1.77 ± 0.10 meters, 78.67 ± 24.15 kg) performed two trials of …

A Full Collegiate Volleyball Season Does Not Influence Jumping Or Landing Performance In Freshmen And Sophomore Players, Christian Noel Sanchez

Open Access Theses & Dissertations

Knee injuries are devastating and typically experienced by athletes when performing jumping and landing tasks throughout a complete collegiate volleyball season. The purpose of this study was to examine changes in lower extremity strength, frontal plane knee angles and moments, jump performance during a countermovement and approach jump before and after a complete Division I collegiate volleyball season in female volleyball freshman and sophomores. Eight freshman/sophomore female collegiate volleyball players participated in the study. Lower extremity strength was assessed using an isokinetic dynamometer, kinematic and kinetic data were obtained through three-dimensional motion capture system and force platforms, respectively. Participants performed …

Accuracy Of Predicted Energy Expenditure From A Fitbit Inspire Hr Activity Monitor During Short- And Long-Duration Exercise, Cailyn Van Camp

Master's Theses and Doctoral Dissertations

PURPOSE: To determine the accuracy of predicted Energy Expenditure (EE) reported by a wrist-worn activity monitor compared to measured EE during both a long- and short-duration exercise. METHODS: In addition to a VO_2max treadmill test, a running speed at approximately 70 - 75% of that VO_2max was found during the first visit. The second and third visit was comprised of either a 30-minute or 10-minute run at the speed previously determined. A wrist activity monitor was worn and VO2 and EE were recorded by a metabolic cart. Pearson correlation, paired samples t-test, and repeated measures ANOVAs compared predicted …

The Influence Of Over-Ground Versus Treadmill Walking On Gait Mechanics In Children With Autism Spectrum Disorder, Emily Ann Chavez

Open Access Theses & Dissertations

Treadmill (TM) walking may be a way to combat obesity and socio-behavioral barriers associated with children with Autism Spectrum disorder (ASD), though tripping-risk has not yet been assessed for this population through use of spatial-temporal gait analysis. The aim of this project/study was to examine spatial-temporal walking mechanics and lower extremity tripping descriptors between over ground (OG) and TM gait conditions in children with ASD compared to children with neurotypical development (NT). Kinematics data were obtained through tridimensional motion analysis where participants, 10 children with ASD and 9 age- and sexmatched NT controls, were outfitted with retroreflective markers on their …

Effects Of A Strength Training Intervention And Quality Of Life: Case Study On A Sedentary Adult Female, Lucas Frazier

Williams Honors College, Honors Research Projects

The purpose of the project is to evaluate physiological and quality of life changes in a

sedentary, senior-aged (55 or older) female using a six-week strength training

intervention. This case study will instruct how to perform a push-pull-legs split

routine by going to the gym three times per week. Prior to the six week intervention,

both quantitative and qualitative variables will be collected to assess baseline data,

including the subject’s resting heart rate, resting blood pressure, grip strength, one-

repetition maximum on seven whole body exercises (dumbbell bicep curl, tricep

pushdown, barbell bench press, wide-grip lat pull-down, seated dumbbell press, …

Physiological Adaptations To Training And Associations With Performance In Division I Cross-Country Runners, Kailyn Renae Sanchez

EWU Masters Thesis Collection

No abstract provided.

Acute Physiological Responses To Arm-Cranking With Blood Flow Restriction, Benjamin Cockfield

Dissertations, Master's Theses and Master's Reports

Physiological responses to aerobic blood flow restriction exercise (BFR) are well documented for lower-body exercise but not upper-body exercise. I evaluated cardiorespiratory (heart rate, VO2, RER, ventilation), metabolic (tissue saturation, deoxyhemoglobin concentrations), and perceptual (effort, pain) responses to arm cranking with BFR at varying arterial occlusion pressures (AOP). Ten adults performed 4 intermittent arm cranking protocols (6x2-min, 1-min recovery): 1) low load (LL) – 40%VO2peak and 0% AOP; high load (HL) – 80%VO2peak and 0% AOP; (BFR50) – 40%VO2peak with 50% AOP; (BFR70) – 40%VO2peak with 70% AOP. Heart rate, RER, and ventilation, were higher with BFR compared to LL …

Forecasting Issues In Ncaa Division I Fbs Athletics, James T. Morton, Donna L. Pastore

Kinesiology and Health Science Faculty Publications

The National Collegiate Athletic Association (NCAA) and its member institutions have been faced with significant changes in the recent past. This study was used to predict issues, caused by some of these changes, which will impact leaders of NCAA Division I Football Bowl Subdivision (FBS) athletic departments over the next five to seven years. The Delphi technique was employed to obtain expert opinions for the forecast. The expert panel consisted of sport management faculty who were surveyed over three rounds to determine what issues were likely to occur and whether or not those issues would have a significant impact. The …

Biomechanics And Neural Control Of Movement: Cmi's Effects On Downstream Motor Processing And Gait In Forwards And Backwards Walking, Christopher Choi

CMC Senior Theses

Analyzing the effects of cognitive motor interferences (CMI) on walking is usually done in patients with neurological comorbidity or during forward walking (FW). However, there are few studies that examine gait differences between FW and backward walking (BW) under the presence of CMI when speed is kept constant on a treadmill. In this study we examined how CMI would disrupt sensory feedback and affect the descending motor pathway. We hypothesized that subjects that walked backwards and were given a cognitive task would show the greatest differences in gait due to a lack of visual input and the presence of CMI. …

Effectiveness Of Wellness Programming To Improve Health And Fitness Metrics In Rural Firefighters, Macy Weeks

College of Graduate Studies: Theses & Dissertations

Background: Worksite wellness programs are an excellent option to help promote health and wellness among employees. However, there is little research discussing these benefits among firefighters. Purpose: The purpose of this study was to evaluate the effectiveness of a wellness program to improve or maintain health and fitness metrics in rural, career firefighters over a 9-month period. Methods: Thirty-six firefighters from a department in southeast Georgia participated in this wellness program. All health and fitness metrics tested were recommended by the National Fire Protection Agency. The wellness program that took place over 9-months provided basic tools and knowledge regarding exercise …

Evaluation Of Cardiovascular Risk Factors In People Living With Hiv In São Paulo, Brazil, Elizabete Santos Melo, Marcela Antonini, Christefany Regia Braz Costa, William Sorensen, Elucir Gir, Renata Karina Reis

Health & Kinesiology Faculty Publications and Presentations

Introduction: HIV infection as a chronic disease has emerged from treatment advances over the past three decades. From this perspective, the diseases associated with AIDS are not a main threat for patients who use Antiretroviral Therapy (ART). A new set of HIV associated complications have emerged resulting in comorbidities related to aging and ART exposure as cardiovascular disease (CVD). This study aimed to evaluate the cardiovascular risk factors in people living with HIV (PLWH) in Brazil. Methodology: This was a cross-sectional study carried out at all Specialized Care Services for people living with HIV in the Southeast of Brazil. A …

The Effects Of In-Season Training Changes On Body Composition In Division I Collegiate Football Players, Kayla Emory

Graduate Research Theses & Dissertations

Body composition quantification in athletics can be used as a tool for developing a training program and monitoring progress in developing ideal body composition for optimal performance. Commonly, athletes are concerned with the amount of fat free mass (FFM) and fat mass (FM) they have, since those variables have been commonly linked to reduced performance and increased injury risks. The game of football is constantly evolving and so is the need for players to be bigger, stronger, and faster. Most research has investigated the body composition changes in football players as a whole team during an off-season, however few have …

Biomechanics In The 4haie Study: Air Pollution And Musculoskeletal Health - An Update, Daniel Jandacka, Jaroslav Uchityil, David Zahradník, Roman Farana, Dominik Villimek, Jiri Skypala, Jan Urbaczka, Jan Plesek, Adam Motyka, Denisa Blaschova, Gabriela Beinhauerova, Marketa Rygelová, Pavel Brtva, Zuzana Golembiovska, Klara Balazova, Jan Malus, Veronika Horka, Julia F. Silvernail, Gareth Irwin, Miika T. Nieminen, Victor Casula, Vlado Juras, Milos Golian, Steriani Elavsky, Lenka Knapova, Radim Sram, Joseph Hamill

Kinesiology and Nutrition Sciences Faculty Research

The overall purpose of the 4HAIE study was to assess the influence of the interaction between air pollution and biomechanical, physiological and psychosocial factors on the incidence of injuries, health and well-being. A total of 1,500 active runners and inactive controls aged 18-65 will be recruited. Herein, we describe the biomechanical study design with data examples to investigate musculoskeletal and neuro-mechanics health in different air quality regions.

Footfall Pattern During Running In Preschool Children According To Age And Footwear, Jan Plesek, Julia F. Silvernail, Joseph Hamill, Daniel Jandacka

Kinesiology and Nutrition Sciences Faculty Research

The aim of this study was to compare the footfall pattern (FP) in different age groups of preschool children while they ran in standard running shoes (SRS) and barefoot. Forty-eight children aged 3-6 years participated in the study and were split into 4 age groups (n=12). All children performed a simple running game (based on the shuffle run) in SRS and barefoot. The length of the runway was adjusted for each age group. Kinematic and kinetic data were collected using 3-D motion capture system. We analyzed strike index (SI) and sagittal plane ankle angle (AA) at initial contact (IC) from …

Footstrike Patterns Of High And Mid-Mileage Non-Rearfoot Runners During An Exhaustive Run, Jan Urbaczka, Julia F. Silvernail, Daniel Jandacka

Kinesiology and Nutrition Sciences Faculty Research

The purpose of this study was to identify the effect of fatigue on footstrike patterns in two groups of habitually non-rearfoot runners. Twenty-eight runners participating in this study were divided into two groups by their weekly mileage. Participants completed a VO2max test to determine the velocity for the fatiguing run. Kinematic, physiological and biochemical data from the beginning and the remaining 3 minutes of fatiguing treadmill run were obtained. The overall time for fatiguing run exceeded 40 minutes (t = 48,1 ± 3,6 min.). The foot angle at the instant of initial contact significantly changed in both groups following fatigue. …

Structural Remodelling Of The Lumbar Multifidus, Thoracolumbar Fascia And Lateral Abdominal Wall Perimuscular Connective Tissues: A Cross-Sectional And Comparative Ultrasound Study, Christian Larivière, Richard Preuss, Dany H. Gagnon, Hakim Mecheri, Sharon M. Henry

Études primaires

Introduction

With low back pain (LBP), remodelling of the lumbar soft tissues involves both trunk muscles and neighbouring passive connective tissues. The aim of the present study was to compare three quantitative measures of these tissues, using ultrasound imaging (USI), among healthy controls and individuals with LBP.

Methods

USI measures from 30 healthy subjects and 34 patients with non-acute LBP were compared between groups and sexes. The measures employed were (1) lumbar multifidus echogenicity (fatty/fibrosis infiltration) at three vertebral levels; (2) posterior layer thickness of the thoracolumbar fascia, and (3) thickness of the perimuscular tissues surrounding the external oblique, internal …

Validation Of A Low-Cost Inertial Motion Capture System For Whole-Body Motion Analysis, X. Robert-Lachaine, H. Mecheri, A. Muller, C. Larue, A. Plamondon

Études primaires

While some low-cost inertial motion capture (IMC) systems are now commercially available, generally, they have not been evaluated against gold standard optical motion capture (OMC). The objective was to validate the low-cost Neuron IMC system with OMC. Whole-body kinematics were recorded on five healthy subjects during manual handling of boxes for about 32 min while wearing 17 magnetic and inertial measurement units with Optotrak clusters serving as a reference. The kinematical model was calibrated anatomically for OMC and with poses for IMC. Local coordinate systems were aligned with angular velocities to dissociate differences due to technology or kinematical model. Descriptive …

Neuromechanical Tuning For Arm Motor Control, Russell Lee Hardesty Jr

Graduate Theses, Dissertations, and Problem Reports (ETD)

Movement is a fundamental behavior that allows us to interact with the external world. Its importance to human health is most evident when it becomes impaired due to disease or injury. Physical and occupational rehabilitation remains the most common treatment for these types of disorders. Although therapeutic interventions may improve motor function, residual deficits are common for many pathologies, such as stroke. The development of novel therapeutics is dependent upon a better understanding of the underlying mechanisms that govern movement. Movement of the human body adheres to the principles of classic Newtonian mechanics. However, due to the inherent complexity of …