Sports Sciences Commons^™

Relationships Between Lower Body Anthropometrics And Vertical Force-Velocity Profiles In Collegiate American Football Players, Nicholus Adam Despot

Doctoral Dissertations and Projects

The study examined the relationships between lower-body anthropometric characteristics and vertical force-velocity profiles in collegiate American football players. Although the use of force-velocity profiling has increased significantly in recent years, there has been limited research on the association between structural features and key mechanical outputs. A sample of 16 NAIA football players was used to examine how skeletal breadths, girths, and derived ratios relate to key force-velocity metrics. Anthropometric variables were collected using ISAK standards, while force-velocity profiles were obtained through a series of loaded squat jumps on a force platform. Mean propulsive force, velocity and power were used to …

Evaluation Of The Effectiveness Of The Guardian Protective Cap In Reducing The Incidence And Recovery Duration Of Concussions Among Division Ii Collegiate Football Players In The State Of West Virginia, Dave Mcentire

Doctoral Dissertations and Projects

This study focuses on a retrospective quasi-experimental design to evaluate the effectiveness of the Guardian protective cap in reducing the incidence and recovery duration of concussions among Division II football players in the state of West Virginia. The study will evaluate the medical records, obtained from the NCAA certified athletic trainers, of four seasons worth of data from two separate football teams. The study will examine two seasons worth of data of the teams prior to mandating the usage of the protective caps during practice, and two seasons of data following their implementation. The study will compare the overall incidence …

Barriers To Physical Activity Among Community College Students, Erica Keels

Doctoral Dissertations and Projects

The purpose of this qualitative study was to explore the perceived barriers, motivators, and student-identified strategies related to physical activity among students enrolled at a community college located in Northwest Florida. Guided by the Social Ecological Model (SEM), Self-Determination Theory (SDT), Health Belief Model (HBM), and Theory of Planned Behavior (TPB), this study employed a qualitative descriptive design to examine students’ lived experiences and perceptions that influence their physical activity behaviors. Data were collected through an online open-ended survey administered to students aged 18 years and older. A total of 134 students initially accessed the survey, and 126 eligible participants …

The Association Between Diet Quality, Nutritional Knowledge, Low Energy Availability, And Eating Disorder Risk In Collegiate Student-Athletes, Laurel Koontz Awald

Doctoral Dissertations and Projects

This study aimed to investigate the association between diet quality, nutritional knowledge, low energy availability, and eating disorder risk in a sample of collegiate student-athletes across several sporting disciplines. The quantitative cross-sectional survey was developed using validated questionnaires to investigate diet quality (The Athlete Diet Index), nutritional knowledge (The Platform for Evaluating Athlete Knowledge in Sports – Nutrition Questionnaire), low energy availability (The Low Energy Availability in Females Questionnaire and Low Energy Availability in Males Questionnaire), and eating disorder risk (DESA – 6). College athletes were recruited from Division I and III universities: (N = 31) from the track and …

From Perception To Performance: The Acute Impact Of Virtual Reality On Hitting Metrics In Collegiate Baseball And Softball Hitters, Darrianne Kylie Hale

Doctoral Dissertations and Projects

The purpose of this study was to examine the acute effects of the four warm-up conditions of virtual reality (VR), heavy bat, light bat, and game bat on hitting metrics in collegiate baseball and softball players. Specifically, this research investigated whether a perceptual-cognitive warm-up using virtual reality produced performance outcomes comparable to traditional physical warm-ups in key physical hitting metrics, including bat speed, time to contact, launch angle, and exit velocity. Each participant experienced all four warm-up conditions in a within-subjects, repeated measures design. Performance was measured using Blast Motion and HitTrax technologies, and statistical analysis was conducted using a …

Acute Effects Of Olympic Lifting Post-Activation Potentiation On Baseball Pitching Velocity And Ball Flight: A Crossover Study, Brent Hauser Pourciau

Doctoral Dissertations and Projects

This quantitative study evaluated the acute effect of an Olympic lifting-based post-activation potentiation (PAP) warm-up on fastball performance in collegiate baseball pitchers. Using a randomized, counterbalanced within-subjects crossover design (N = 13), each participant completed two warm-up conditions in a single indoor session: (a) a standard dynamic baseball warm-up and (b) the same standard warm-up followed by a brief Olympic-lifting PAP sequence (1 x 3 clean pulls at 80% predicted one-repetition maximum [1RM], 1 x 3 power cleans at 80% predicted 1RM, and 1 x 3 power jerks at 60% predicted 1RM, with 2-minute rests between sets) and a 3-minute …

Oxygen Under Pressure: A Comparative Study Of Maximal Oxygen Uptake In Firefighters And Civilians, Jordan N. Hunt

Doctoral Dissertations and Projects

The purpose of this study aimed to investigate and compare V̇O2max levels between firefighters and age-matched individuals from the general population. This study used a quantitative, comparative, cross-sectional design to assess differences in directly measured V̇O2max with a breath-by-breath portable analyzer between firefighters and matched civilians, determine the percentage of firefighters meeting NFPA recommended fitness thresholds, and examine the accuracy of estimated V̇O2max values. A total sample size of 52 participants (26 per group) participated in this study. Firefighters exhibited significantly higher directly measured V̇O2max and V̇O2peak than age-, sex-, and BMI-matched individuals from the general population. Firefighters in this …

The Role Of Personality In Collegiate Athletes’ Indicators Of Performance And Injury Experiences – A Mixed Methods Study, Allison Traub

Doctoral Dissertations and Projects

This mixed methods study explores the impact of collegiate athletes' indicators of personality traits as attributed to athletic performance, injury experiences, and sport identity. Sports often emphasize physical abilities, yet the role of personality is equally significant—though it has received comparatively little attention in psychological research. This research addresses such a gap through examining how personality traits shape athletes’ competitive behavior along with coping strategies. The traits are defined within the 16 Personalities framework using Myers-Briggs Type Indicator (MBTI) and how it influences just how athletes recover. This research will explore research questions such as how personality affects college athletes' …

Evaluation Of Handgrip Strength As A Surrogate Measure For Athletic Performance Metrics And Lower-Body Strength In High School Boys Basketball Players, Joseph R. Northcutt

Doctoral Dissertations and Projects

This quantitative correlational study examined relationships between bilateral handgrip strength (HGS) and athletic performance metrics, including vertical jump height, barbell squat one-repetition maximum (1RM), sprint speed, agility, and upper-body muscular endurance (push-up repetitions), in adolescent male basketball players. The study also evaluated whether inter-limb strength asymmetry was associated with the athletic performance outcomes.

29 male athletes aged 14-18 years participated in the research that included handgrip strength, vertical jump, lane agility drill, shuttle run, ¾-court sprint, push-up repetitions, and 1RM barbell squat. Statistical analyses were conducted using Jeffreys’s Amazing Statistics Program (JASP) and included Pearson product-moment correlations, Shapiro-Wilk assumption testing, …

The Effects Of Grounding Techniques On Strength And Power In Division Ii Track And Field Athletes: A Pre/Post Cohort Study, Matthew Ronald Hall

Doctoral Dissertations and Projects

Grounding is the practice of connecting the human body to the Earth’s electrical surface. It has been proposed as a natural intervention capable of reducing inflammation, enhancing recovery, and improving physiological balance. While previous research has identified benefits for general health and recovery, limited evidence exists regarding its effects on athletic performance. This study investigated the effects of grounding interventions on strength and power among Division II track and field athletes. A five-week, pre/post randomized prospective cohort design was employed with thirty participants, stratified for men and women, which included three groups: grounding sheets, grounding pads, control. Athletes were assessed …

Bridging The Gap: Does Individual Crossfit Open Performance & Event-Type Influence Crossfit Games Team Performance?, Anthony J. Mack

Doctoral Dissertations and Projects

Individual CrossFit Open (CFO) and CrossFit Games (CFG) performance factors, including physiological metrics, sex, competitive experience, and workout pacing strategies, are well established; however, there is a gap in the literature comparing CFO and CFG team performance. The purpose of this study was to examine whether individual CFO scores and event category (i.e., monostructural, gymnastics-skill, weightlifting, or work capacity) influence a team's final score at the CFG. Teams (n = 196) from the 2018-2024 CFG seasons were included in data collection. Data from CFO workouts (n = 28) and CFG team events (n = 62) were extracted from games.crossfit.com. Scores …

Empowering Youth Tackle Football Athletes: A Content Analysis Of Nonlinear Pedagogy’S Influence On Autonomy And Practical Applications In Youth Tackle Football, Benjamin Jay Andelman

Masters Theses

Youth tackle football offers an environment that promotes both positive mental and physical benefits for young athletes. Despite the positive benefits associated with sports, participation is on the decline. The content analysis found connections between the prevailing prescriptive coaching methods in youth tackle football and the adverse mental effects on young athletes. This study, utilizing a qualitative content analysis of existing academic literature, proposes a practical application of Nonlinear Pedagogical principles in the youth tackle football practice context to develop a coaching model that promotes athlete autonomy, thereby increasing positive mental benefits for the youth athlete. Leveraging Ecological Dynamics, Constraints-Led …

Investigating “Sled Head” Phenomenon And Diurnal Patterns In Team Usa Bobsleigh And Luge Athletes: A Virtual Research Study, Garrett R. Augsburger

Doctoral Dissertations and Projects

This study investigated the relationship between training time, performance, and concussion symptoms among Team USA bobsleigh and luge athletes during a four-week training season. Recognizing the high physical demands and potential risks associated with sledding sports, the study aimed to understand the prevalence of concussion-related experiences and how training schedules might influence athletic performance and symptomology. Repeated measures quantitative design was employed using session-level survey data submitted by athletes following daily training sessions. Data was collected through a structured questionnaire assessing variables such as performance rating, fatigue, alertness, training intensity, sleep quality, and concussion symptoms. A total of 156 sessions …

The Effects Of The Menstrual Cycle On Movement Velocity In Female Athletes, Casey M. Krolikowski

Doctoral Dissertations and Projects

This study examined the psychological and physiological impacts of menstrual cycle phase and hormonal contraceptive (HC) use on barbell back squat and bench press velocity, handgrip strength, and countermovement jump height. The aim was to determine whether HC use and premenstrual syndrome (PMS) symptoms affected performance during menstruation, the late follicular phase (LFP), or the mid-luteal phase (MLP). Fourteen college-aged female athletes (N = 14) were divided into HC users (n = 7), and naturally menstruating, eumenorrheic individuals (n = 7). Movement velocity data was assessed using RepOne linear position transducers, jump height with the Just Jump mat, and grip …

An Analysis Of Sport Science Practices And Standards In Collegiate Football, Corey F. Fitzgerald

Doctoral Dissertations and Projects

This dissertation presents the findings of a survey that identifies the sport science practices and standards utilized in National Collegiate Athletic Association (NCAA) football programs. In total a fifty-two item survey instrument was administered that examines seven sections, including (i) demographics, (ii) current sport science practices, (iii) advanced technology, (iv) decision-making processes, (v) health and wellness, (vi) budget and resources, and (vii) comments. All generated numerical data was organized into a statistical analysis program, SPSS Statistics v 29.0.2.0 (© IBM Corporation). Correlations were conducted on data gathered from Likert Scale questions, using Spearman test. Additionally, comprehensive non-numerical subjective data was …

The Impact Of Cold-Water Immersion On Mental Health: A Qualitative Study, Marcus Jean-Francois

Doctoral Dissertations and Projects

Historically, Cold Water Immersion (CWI) was used for physical therapy and is now a potential non-pharmacological intervention for mental health illnesses such as depression, stress and anxiety. In this study in Kota Kinabalu, Sabah, Malaysia, we examined the personal experiences on the psychological impact of CWI on mental health. We examined twelve participants between 20-35 years of age that had a self-diagnosed mental illness to participate in six CWI sessions over the span of three weeks. This study predicts that CWI will have a significant reduction in their mental health illness compared to baseline levels. Employing a Hermeneutic Phenomenological approach, …

Exploring The Impact Of Foot Overpronation On Gluteus Medius Activation In Recreational Runners: A Biomechanical Analysis, Austin D. Stroeh

Doctoral Dissertations and Projects

Pes planus foot type and gluteus medius (GMed) dysfunction are independently considered risk factors in developing several overuse running-related injuries because they propagate kinematic and kinetic changes in the leg during the gait cycle. While both produce similar kinesiological actions, research on the relationship between foot type and GMed activation in running is limited. The purpose of this study was to investigate the relationship between pes planus and pes rectus foot types and their association with GMed activity during running gait in recreational endurance runners. 47 recreational endurance-based runners running approximately 5-15 miles weekly for at least 6 months with …

Growth, Maturation, And Selection Of Elite Youth Ice Hockey Players, Ryan Podell

Doctoral Dissertations and Projects

Maturity status may influence the selection of elite youth ice hockey teams in the United States. Assessing biological maturity status could provide insight into the prevalence of maturation related selection biases. Thus, the purpose of this study was to establish normative maturity status ranges, determine if maturity or relative age effect selection biases existed, and compare levels of agreement between methods to predict maturity status for elite youth ice hockey players in the United States. Part one of this study assessed the biological maturity status and birth months for 126 athletes, ranging 9-16 years of age, from an elite youth …

The Relationship Between The Jiu Jitsu Anaerobic Performance Test And Physiological Markers In Trained Jiu Jitsu Practitioners, Renee K. Peveler

Masters Theses

Jiu Jitsu relies on aerobic and anaerobic energy systems. A relationship has been demonstrated between the Jiu Jitsu Anaerobic Performance Test (JJAPT) and anaerobic performance. The relationship between the JJAPT and aerobic performance has yet to be quantitatively defined. The purpose of this study was to determine if there is a relationship between the JJAPT and maximum oxygen uptake and ventilatory threshold (VT). Twenty-five Jiu Jitsu subjects participated in two test sessions a minimum of 48 hours apart. During one test session, descriptive statistics were collected, a self-guided treadmill warm-up was completed, followed by the Bruce graded exercise protocol. Ventilatory …

From Nil To Enrollment: How Nil Agreements Shape College Choices For Top Men’S Basketball And Football Prospects, Will Trantham, Kate Wilson, Grace Shaw, Bruna Gebaili Sampaio

Liberty University Research Week

This study deeply examines how NIL deals have impacted the chosen University of attendance for 5-star men’s basketball and football athletes. The recruitment of high-profile athletes to universities across the country has been greatly altered with the addition of NIL to the college landscape. The process of reaching a conclusion on where to attend school seems to have greatly changed from academic prowess and facilities to guaranteed money and personal brand exposure. Through this study, we will be conducting in depth Zoom interviews with former recruits that are now currently attending college. We will then use those gathered responses and …

The Effects Of The Repetitive Use Of A Position-Specific Loading Pattern On Lower Limb Asymmetry In Nfl Offensive Tackles, Kavan B. Latham

Doctoral Dissertations and Projects

American Football is a fast-paced, high-impact, collision sport associated with high frequency of injuries occurring through contact or non-contact, acute impact, or repeated stresses. This purpose of this short-term longitudinal study was to examine development of musculoskeletal asymmetries through a specific loading pattern used by the offensive tackle in the National Football League (NFL). Using both cross-sectional and longitudinal designs, strength and asymmetry changes in five NFL offensive tackles were analyzed pre- and post-training camp, with a focus on three key isometric strength tests: the Isometric Mid-Thigh Pull Test (IMTP), the Isometric Staggered Stance Pull Test (IMSSP), a Force Frame …

Meditation Or Medication: Comparing Meditation To Phosphatidylserine In The Reduction Of Salivary Cortisol In Collegiate Tennis Players Post Exercise, Elizabeth Ann Novian Hughes

Doctoral Dissertations and Projects

Phosphatidylserine (PS) is a glycerophospholipid made in the body that is a part of the cell membrane (Carter & Greenwood, 2015; McArdle et al., 2019). PS reduces cortisol levels in the body (McArdle et al., 2019). Meditation is a “consistent self-care practice…that allows for developing loving awareness of current thoughts and feelings” (Valluri et al., 2024. Definition section, para. 1). Sadimi et al. (2021) used mindfulness meditation and found cortisol reductions were high. Meditation (MED) has not been compared to PS in reducing cortisol. Cortisol is increased in the body in response to the reception of stress input, such as …

Physiological And Biomechanical Perspectives On Elbow Function During Forehand And Backhand Disc Golf Throws: A Novel Investigation, Lauren Rachelle Giles

Doctoral Dissertations and Projects

Over 81% of players have reported injuries linked to disc golfing, predominantly due to overuse. Since disc golf originated, there is a lack of research on the proper biomechanics of the disc golf throw. This descriptive, quantitative study seeks to be the first. We investigated 6 females and 35 males, aged 21-66, registered to compete in disc golf. The goal was to examine the kinetic parameters of healthy disc golfers to identify biomechanics likely associated with safety. Research questions investigated whether there is a connection between lean body mass and disc distance traveled, elbow torque and disc distance, or grip …

Injury Prevalence Among Females Playing American Football, Anthea Warren-Williams

Doctoral Dissertations and Projects

While extensive research has examined injuries in men's football, there is a significant lack of studies systematically investigating the types, patterns, and long-term effects of injuries among female football players. This study aimed to address this gap by investigating the types and frequencies of injuries sustained by female American football players. A recruitment letter was sent via email, and following approval, an anonymous online survey was distributed to collect data from participants about their injuries during the 2023 season. The study included 13 teams from the WFA Pro division, with a total of 647 players, recruiting 245 participants aged 19 …

Comparing Physiological, Psychological, And Performance Changes Between Myo-Reps Vs Traditional Hypertrophy Protocols, Antonella V. Schwarz

Doctoral Dissertations and Projects

In long-term athlete development, it is common to emphasize hypertrophic adaptations during the beginning training phases prior to focusing on strength and power performance. The purpose of this study was to compare the physiological, psychological, and performance differences between myo-reps (MYO) vs. traditional (TRAD) hypertrophy protocols in trained n=8 male subjects over eight weeks. Current literature suggests hypertrophy may be optimized through 3-6 sets of 6-12 repetitions at 60-80% of one-repetition maximum (IRM) with 1-3 minutes of rest per set. However, alternative hypertrophy protocols such as MYO are underexplored. This quantitative experimental study assessed MYO vs TRAD protocols on hypertrophy …

Assessing A Reading Score's Ability To Predict Pta Program Student Success, Tiffany H. Bain

Doctoral Dissertations and Projects

Admission into a physical therapist assistant (PTA) program continues to be highly competitive, with consistently more applicants than available seats. Student success is essential for maintaining CAPTE accreditation. There is limited research on admission criteria and predictors of success in physical therapist assistant education. This study aimed to determine if the Accuplacer or ACT reading test scores can predict student success (program completion and first-time NPTE-PTA) in a physical therapist assistant program using Astin’s input-environment-output (IEO) model as the theoretical foundation. This non-experimental logistic regression study used retrospective secondary data from an associate degree-level physical therapist assistant program 2016 through …

Psychological Profile Of Brazilian Jiu-Jitsu Athletes, Leandro De Lorenco-Lima

Doctoral Dissertations and Projects

Martial arts and combat sports have been shown to influence several desirable psychological factors positively. This quantitative study aimed to explore the differences in mental strength, resilience, grit, self-efficacy, self-control, aggression, life satisfaction, and mental health between belt ranks in Brazilian Jiu-Jitsu (BJJ) athletes. A sample of 410 BJJ participants (323 males and 87 females) from 18 to 60 years of age was included in this study. Data was collected anonymously via Google Form and included the Mental Strength Scale, Brief Resilience Scale, Grit Scale, General Self-Efficacy Scale, Brief Self-Control Scale, Brief Aggression Questionnaire, Satisfaction with Life Scale, Mental Health …

An Analysis Of Strength Training Implementation In Ballet, Claire Hoover

Senior Honors Theses

Ballet, a style of dance that is known for its 180-degree external rotation, extreme precision, discipline, and aesthetics, is an athletic activity that is undertaken by many young people, particularly females. Although ballet has many athletic components, recent studies have shown there are a variety of weaknesses that impact its participants, including the female athlete triad, lack of lower extremity muscular strength, risk of injury, and overtraining. According to recent research, strength training, although not historically paired with ballet, could minimize ballet dancers’ deficiencies by increasing muscular strength and reducing risk of injury and incidence of the female athlete triad. …

Sex-Related Differences In Reaction Time During Normobaric Hypoxic Hypoxia In Physically Active University Students, Danielle Passburg

Senior Honors Theses

Limited research has been completed on the sex-related differences in reaction time during hypoxic hypoxia. This is concerning due to the importance of reaction time during hypoxic hypoxia in aviation (particularly within the realm of military aviation). The purpose of this study was to examine the sex-related differences in reaction time during hypoxic hypoxia in university students. The study used a normobaric oxygen device to simulate hypoxic states and Delphi computer software to test reaction time. Subjects were physically active university students (10 females, 10 males). The results of the study showed no significant differences between sexes in reaction times …

The Effect Of Stroboscopic Vision On The Y-Balance Test, Alex Habegger

Doctoral Dissertations and Projects

The purpose of this study was to determine if stroboscopic vision significantly effects performance on the YBT-LQ in athletes 12-18 years old, as well as investigating if age or sex effect performance. Previous research has demonstrated the clinical use of stroboscopic vision for athletic performance and rehabilitation, but no study had yet established the effect of stroboscopic vision on dynamic balance. Subjects performed the Y-Balance Lower Quarter (YBT-LQ) and then repeated the YBT-LQ with stroboscopic vision at a rate of 4 hertz (Hz). A repeated measures factorial ANOVAs were used identify significant differences in performance on the YBT-LQ with and …