Biomechanics Commons^™

Kettlebell Swings As A Conditioning Activity On Standing Power Throw: Exploring Post-Activation Performance Enhancement In Rotc Cadets, Knik Durman

Masters Theses & Specialist Projects

Post-activation performance enhancement (PAPE) is a neuromuscular phenomenon where high-intensity conditioning activities (CA) temporarily improve explosive performance. While resistance and ballistic exercises are well-studied for PAPE, the effectiveness of kettlebell swings (KBS) in enhancing Standing Power Throw (SPT) performance remains unclear. Given the SPT’s role in the Army Combat Fitness Test (ACFT), identifying effective PAPE strategies could improve ACFT scores. Using a randomized crossover design, this study examined whether KBS before the SPT enhanced throw distance in 19 ROTC cadets (male: n = 17, female: n = 2). Participants completed two conditions: (1) KBS (two sets of five reps with …

Menstrual Cycle Variations In Ultrasound And Biomechanical Risk Factors For Acl Injury In Adolescent Female Athletes, Jessica Garcia

Kinesiology Dissertations - Archive

Anterior cruciate ligament (ACL) injuries are a significant concern in adolescent female athletes, with rates consistently higher than their male peers. This disparity is attributed to a complex combination of anatomical, hormonal, and neuromuscular factors that elevate injury risk while performing dynamic movements common in running and cutting sports such as soccer, basketball, lacrosse, and volleyball. Knee laxity has been identified as a potential risk factor, yet current measurement tools lack the sensitivity, reliability, and validity needed for practical application. Additionally, fluctuating sex hormones throughout the menstrual cycle (MC) have been implicated in changes to ligament properties and neuromuscular control, …

Force Matters: An Exploration Of Manual Therapies Effects On Passive Tension Properties Of The Lower Extremity., Loran D. Wade Jr

Kinesiology Dissertations - Archive

Musculoskeletal dysfunction is a leading cause of pain, functional limitation, and disability worldwide, necessitating the exploration of non-invasive therapeutic strategies. Manual therapy, which encompasses massage, stretching, and instrument-assisted soft tissue mobilization (IASTM), has long been used to address musculoskeletal dysfunction, yet its mechanisms of action and clinical efficacy remain inconsistently defined within the literature. This paper provides a comprehensive review of the historical foundations, physiological effects, and current applications of manual therapy techniques in the treatment of musculoskeletal disorders. Emphasis is placed on how these interventions influence key musculoskeletal properties, including tissue stiffness, joint range of motion, neuromuscular function, and …

Comparative Tendons, Frank E. Fish

Biology Data Repository

The data are for examination of the physical properties of the tendons in the peduncle of the harbor porpoise to compare the dorsal and ventral tendons. Data are from mechanical testing of tendon fascicles by ramp to failure, stress relaxation, and crimp tests.

Final Comparison Of Blue & Humpback Forms, Frank E. Fish

Biology Data Repository

No abstract provided.

The Effects Of Shoe Forefoot Design On Center Of Pressure And Knee Moments During Running In A Fatigued And Non-Fatigued State, Tyler Tran

Open Access Master's Theses

Runners experience high injury prevalence, which can be attributed to the overloading of the musculoskeletal system during the repetitive motion of running (Kakouris et al. 2021, Lopes et al. 2012). While some running mechanics are associated with better performance or increased risk for developing an orthopedic condition, many are still poorly understood (Van Hooren et al. 2024, Willwacher et al. 2022). Center of pressure and frontal plane knee moments are two such mechanics with a limited body of evidence leading to its importance (Mehdizadeh et al 2021, Baker et al. 2018). Although running mechanics describe the motion, the origin of …

Innovative Biomechanical And Engineering-Based Assessments Of Hip Mechanics In Individuals With Hip-Related Pain, Holly M. Stanze

Theses and Dissertations--Kinesiology and Health Promotion

Individuals with hip-related pain exhibit altered movement patterns, and worse fear of movement (kinesiophobia), compared to asymptomatic controls. Exacerbation of hip pain during movement and the role of hip symptom duration may help further our understanding of specific movement patterns that are associated with hip-related pain. A better understanding of the potential connections between hip-related symptom duration, kinesiophobia, hip pain during movement, and lower limb mechanics in those with hip-related pain may allow for more efficient referrals to clinicians and lead to more effective rehabilitation. In addition, the impact of hip-related pain on intra-articular hip loading patterns is not well …

Canine Agility On The A-Frame Obstacle, Derek Wheeler

Williams Honors College, Honors Research Projects

Agility dogs rely on speed, strength, and precision to safely complete obstacles, such as the A-frame. These athletes can experience injuries in training or competition and the variability in multiple repetitions is undocumented. The purpose of this study was to evaluate whether canine mass and trained contact behavior affected performance variables, including number of footfalls, obstacle completion time, and velocity between repetitions. Twenty-one actively competing dogs, at the masters level in American Kennel Club agility, were recorded completing two repetitions of the A-frame under standardized conditions. Paw placements were tracked manually frame by frame in XMALab and statistical analyses including …

Patient Handling Interventions And Their Role In Reducing Musculoskeletal Disorders Among Healthcare Workers, Ashley L. Hawke

Dissertations, Master's Theses and Master's Reports

Musculoskeletal disorders (MSDs) are prominent among healthcare professionals, especially those who perform manual patient handling tasks. Assistive devices (e.g., slider sheet, gait belt, mechanical lift) have been used for patient handling. However, the effectiveness of these devices in reducing MSD risk factors is varied. Additionally, the relationship between healthcare workers’ acceptability of patient handling devices and organizational policies that facilitate or hinder widespread implementation is not well understood. The goal of my dissertation was to conduct a comprehensive analysis of existing patient handling devices and their role in mitigating MSD risk among healthcare workers. For Study 1, I conducted a …

Using Accelerometry To Determine Loss Of Active Eccentric Control During The Nordic Hamstring Exercise, Makenna Kulzer

College of Graduate Studies: Theses & Dissertations

Hamstring strain injuries are among the most common musculoskeletal injuries in sports with high recurrence rates. The Nordic hamstring exercise (NHE) is a commonly used eccentric exercise intervention to reduce injury risk but has generated controversy regarding its utility due to limited sport specificity. Research examining how NHE performance affects its efficacy remains scarce. Therefore, this study investigated whether accelerometry data could describe the loss of active eccentric control (Q2) and if there is an interaction between leg preference and repetition on time to Q2. METHODS: Thirty college-aged students with >3 months of resistance training experience (1-2x/week). were recruited. Participants …

Computational Approaches For Diagnosing Neurological Impairments And Restoring Functional Movement, Serhii Bahdasariants

Graduate Theses, Dissertations, and Problem Reports (ETD)

Movement is the primary means by which the nervous system converts intention into interaction with the environment. Voluntary limb motion enables standing, walking, reaching, and grasping—actions that underpin self‑care, communication, and economic participation. When diseases or injuries disrupt the pathways that couple neural commands to muscle forces—whether through cortical stroke, spinal cord injury, or peripheral nerve damage—mechanical outcomes such as weakness, loss of coordination, and ultimately reduced mobility emerge. These impairments cascade into secondary complications, increased dependence on caregivers, and diminished quality of life. Quantifying how the lesion alters the mechanics of movement is therefore essential for designing targeted interventions …

Lower Extremity Individual Muscle Forces In Females During Loaded Hex-Bar Squat Jumps, Jadon Konkel

Theses and Dissertations

The purpose of this study was to describe the individual muscle forces and contributions to extensor force occurring during the propulsive phase of unloaded jumps in females and explore how these are influenced by increasing loads using the hex bar modality. Ten, college-aged females (height: 1.66 ± 0.09 m; weight: 68.63 ± 9.66 kg) with weightlifting experience performed hexagonal bar squat jumps at bodyweight (BW), BW+20% and BW+40% of 1RM. Traditional motion capture techniques were employed to collect dominate lower limb kinematics and kinetics. Individual muscle forces were estimated utilizing Static Optimization in OpenSim using a Gait2392 musculoskeletal model. Muscle …

Quantitative Approaches To Unravel The Mechanobiology Of Cortical Folding, Ramin Balouchzadeh

McKelvey School of Engineering Graduate Student Theses & Dissertations

Quantitative Approaches to Unravel the Mechanobiology of Cortical Folding by Ramin Balouchzadeh Doctor of Philosophy in Mechanical Engineering Washington University in St. Louis, 2024 Professor Philip V. Bayly, Chair Professor Kara E. Garcia, Co-Chair Brain development is a highly complex process driven by mechanical forces and material properties that shape the cerebral cortex’s characteristic gyri and sulci. Abnormalities in this folding pro?cess are associated with neurodevelopmental disorders such as autism and schizophrenia. Despite significant advancements, the underlying mechanical principles governing brain morphogenesis remain incompletely understood. This body of work investigates three key aspects of brain de?velopment: stress-dependent growth, evolving tissue …

Bone-Ivd Crosstalk And The Role Of Rage Signaling In An Ivd Injury Model, Remy Walk

McKelvey School of Engineering Graduate Student Theses & Dissertations

Low back pain (LBP) is the number one musculoskeletal cause of disability with a lifetime prevalence of up to 85%. The causes of LBP are multifactorial with potential contributions from factors such as tissue injury and degeneration as well as social economic and psychological factors. Intervertebral disc (IVD) degeneration is associated with 26-40% of LBP cases and in a 2015 meta-analysis, it was estimated that a total 403 million people suffer from symptomatic IVD degeneration. IVD degeneration is characterized by loss of hydration in the nucleus pulposus (NP), damage accumulation in the annulus fibrosus (AF) and calcification of the cartilaginous …

Bone-Ivd Crosstalk And The Role Of Rage Signaling In An Ivd Injury Model, Remy Walk

McKelvey School of Engineering Graduate Student Theses & Dissertations

Low back pain (LBP) is the number one musculoskeletal cause of disability with a lifetime prevalence of up to 85%. The causes of LBP are multifactorial with potential contributions from factors such as tissue injury and degeneration as well as social economic and psychological factors. Intervertebral disc (IVD) degeneration is associated with 26-40% of LBP cases and in a 2015 meta-analysis, it was estimated that a total 403 million people suffer from symptomatic IVD degeneration. IVD degeneration is characterized by loss of hydration in the nucleus pulposus (NP), damage accumulation in the annulus fibrosus (AF) and calcification of the cartilaginous …

Game On! A Comparative Analysis Of External Load In Division Iii Soccer Players Across Gender And Position, Bianca J. De Lucia, Daniel M. Smith, Ashima Fillbach, Mary K. Feit

Topics in Exercise Science and Kinesiology

Global positioning systems have been used increasingly in sports science due to their ability to quantify external loads of athletes during competitions and practices. Limited research has examined gender differences in external load throughout a collegiate soccer season. PURPOSE: The aim of this study was to compare game workloads across collegiate men (MSOC) and women (WSOC) soccer players. Division III MSOC and WSOC players wore GPS devices during games throughout a 15-week season. METHODS: Metrics analyzed from GPS data were: total distance (TD), sprint distance (SD), number of deceleration efforts (decel) (>-3 m/s²), number of acceleration efforts (accel) ( …

Clinical Utility Of Opencap Motion Analysis In Lower Limb Prosthesis Users, Sarahi Fernandez Leon

Honors Program Theses and Research Projects

The use of prosthetics has gradually increased due to various diseases, and it is estimated that 35-40 million people are prosthetic/orthotic users, with the number estimated to increase to two billion by 2050. Mobility has been determined to be a strong predictor of quality of life. There are various ways to measure mobility and predict outcomes in lower-limb amputees (LLA), such as self-report and performance-based measures. However, these come with many limitations, showcasing the need for quantitative measures of gait parameters to allow for better development of prosthetic components. Motion analysis tools are expensive and time consuming, but an inexpensive, …

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 …

Influence Of Acute High-Intensity Resistance Exercise On Cognitive Performance And Prefrontal Cortex Oxygenation In Recreational Weightlifters, Samuel M. Camacho, Terence Moriarty, Mick G. Mack, Jacob P. Reed, Hyeyoung Cho

Topics in Exercise Science and Kinesiology

Acute exercise has been shown to be effective in improving post-exercise cognitive performance, including executive function. In addition, changes in prefrontal cortex (PFC) activation have been linked to any such improvements. Since resistance and higher intensity exercise is much less studied, the aim of this study was to examine the effect of high-intensity resistance exercise on cognitive performance and to determine if PFC activation was related to this cognitive performance in recreationally trained weightlifters. Ten (M = 5, F = 5) college aged (22 ± 2 years) recreationally trained weightlifters completed the Stroop task prior to and 15- and 30-min …

Incidence Of Achilles Tendon Ruptures And Associated Factors In Women's Artistic Gymnastics, Kayla Horton, Amanda Hawkes

Topics in Exercise Science and Kinesiology

Topics in Exercise Science and Kinesiology Volume 5: Issue 1, Article 10, 2024.

Achilles tendon rupture risk appears to be higher in women's artistic gymnastics compared to other collegiate sports, however little is understood about personal, training, and performance factors potentially associated with this elevated risk. Previous research has only examined gymnasts who have sustained Achilles tendon ruptures while in an NCAA environment. The overall incidence of Achilles tendon ruptures among gymnasts has not been assessed. This study aims to identify injury factors, Achilles rupture incidence and training habits related to Achilles tendon ruptures in current and former women’s artistic …