Sports Sciences Commons^™

Agreement Level Of Running Temporal Measurements, Kinetics, And Force-Time Curves Calculated From Inertial Measurement Units, Austin Smith

Electronic Theses and Dissertations

Inertial measurement units (IMUs) and wearable sensors have enabled athlete monitoring and research to become more ecologically valid due to their small size and low cost. IMUs and accelerometers that are placed on the body close to the point of impact and that record at sufficiently high frequencies have demonstrated the highest validity when measuring temporal gait event moments such as ground contact time (GCT) and flight time (FT) as well as peak forces (PF) during upright running. While the use of IMUs has increased in the sport performance and athlete monitoring realm, the potential of the technology’s ability to …

Effects Of Carbohydrate Mouth Rinsing Plus Ingestion On Cycling Time Trial Performance, Henry D. Gebhardt

Electronic Theses and Dissertations

Due to limited glycogen stores, carbohydrate (CHO) consumption during exercise is effective at improving performance in endurance events lasting longer than 90 minutes in duration. Recent research has established that CHO mouth rinsing may improve performance over shorter durations, independent of actual consumption. However, research is lacking in determining if an extended period of mouth rinsing has any additive benefit in conjunction with typical CHO beverage consumption over longer competition durations, where CHO ingestion/consumption is likely warranted. PURPOSE: Determine the effects of CHO mouth rinsing combined with consumption compared to CHO consumption alone on cycling performance. METHODS: Following …

The Relationship Between Cell-Free Dna And Resistance Training, Henry Lang

Electronic Theses and Dissertations

The primary purposes of this dissertation were to explore relationship between cell free DNA (cf-DNA), creatine kinase (CK), C-reactive protein (CRP), vertical jump testing delayed onset muscle soreness (DOMS) in response to a high-volume resistance training protocol, and to assess the sensitivity of cf-DNA to different resistance training volume loads. The secondary purpose was to examine the relationship between cf-DNA and relative strength. Study 1 was an exploratory attempt to discover relationships between cf-DNA, CK, CRP, delayed onset muscle soreness, and performance variables. Seventeen resistance trained males were recruited, 9 were randomly assigned to receive BCAAs while 8 received a …

The Effects Of Increasing Running Speed On Vgrf And Asymmetry, Kaela M. Hierholzer

Electronic Theses and Dissertations

Biomechanical and physiological parameters related to running performance are usually studied separately. However, evaluating both aspects together could be beneficial in improving athletic performance. The purpose of this study was to observe the change in peak vGRF and asymmetry as speed increases, while observing physiological responses during a O_2maxtest. Data from athlete monitoring of 12 cross-country and triathlon athletes were analyzed. The athlete monitoring protocol included three unweighted countermovement jumps and a O_2maxtest performed by the athletes. The athletes had an average O_2maxof 53.4 ± 7.7 mL/kg/min, while their average vGRF asymmetry throughout the …

The Effects Of Two Modes Of High-Intensity Intermittent Exercise On Postprandial Metabolism, David J. Buckley

Electronic Theses and Dissertations

The purpose of this study was to see if exercise in the form of Tabata or Sprinting would lower postprandial lipemia and glycemia. Tabata was composed of body-weight exercises. Both Tabata and Sprinting consisted of 5 rounds with each round lasting 4 minutes and included movements performed for 20 seconds followed by 10sec of rest. Following the completion of each round, participants received a 60 second break. Both exercise sessions were isocaloric and lasted 25min. Thirty minutes following exercise, participants were given a 75g-oral glucose solution and a high-fat meal two hours following exercise. The postprandial assessment lasted 6 hours. …

Changes In Countermovement Jump And Sprint During A Congested Match Schedule In Female Youth Soccer Players, Joanne Spalding

Electronic Theses and Dissertations

Youth soccer players are required to play multiple matches within a short period of time. Participation in congested match schedules like youth soccer tournaments can result in fatigue and a decline in physical performance. The purpose of this study was to examine changes in countermovement jump height variables and sprint time to determine if physical performance was altered. Fourteen youth female soccer players performed countermovement jump testing pre, post-match, and post-tournament, and sprint testing pre and post-tournament. Jump height differed significantly (p

Impact Of Coaching By Extension Professionals On Rural Wellness Coalition Success, Taylor Willhite

Electronic Theses and Dissertations

Objective: To quantitatively assess coaches perceived confidence in coaching rural wellness coalitions and to qualitatively determine barriers and facilitators to success in coaching rural wellness coalitions.
Design: A mixed methods design was utilized with quantitative (scorecard) and qualitative (key informant interviews) methodologies.
Setting: Six rural South Dakota wellness coalitions.
Participants: Extension wellness coalition coaches (n=7), one previous and six current.
Intervention: A component of the broader SDSU Extension 1416 Centers for Disease Control (CDC) and Supplemental Nutrition Assistance Program Education (SNAP-Ed) intervention.
Analysis: STATA was utilized for the quantitative scorecard data by running paired ttests. NVivo was utilized in the …

Humeral Retroversion, Range Of Motion, And Strength Adaptations In Tennis Players, Daniel Hannah

Electronic Theses and Dissertations

Purpose: This study aimed to develop an understanding of humeral retroversion (HRV) asymmetries in tennis players and its impact on physical and performance characteristics of the shoulder.Participants: Healthy tennis players were categorized into 3 groups: younger juniors (n=11, age=14.5±0.5 years), older juniors (n=12, age=17.1±0.9 years), and collegiate (n=16, age=19.6±1.2 years). Methods: HRV, internal rotation (IR), and external rotation (ER), total arc of motion (TAM), HRV-corrected IR (HRVcIR), and HRV-corrected ER (HRVcER) were measured and calculated bilaterally using a digital inclinometer and ultrasonography. Bilateral differences (Δ) were calculated (dominant minus nondominant) for HRV and ROM variables. Isometric ER:IR strength ratios …

Exploring The Match Demands Of Division I Women’S Collegiate Soccer, Robert W. Sausaman

Electronic Theses and Dissertations

The purpose of this dissertation is to shed light on the physical demands of women’s soccer at the NCAA division I college level. Though research does exists describing the physical demands of women’s soccer, the vast majority seeks to explain the physical demands association with the professional and international level. This dissertation sought to: 1) examine the physical demands of NCAA division I women’s soccer and 2) observe changes in physical demands of two NCAA division I women’s soccer players over a four-year career using a case study approach.

Study 1 examined the physical demands of twenty-three athlete from a …

Changes In Psychological, Morphological, And Performance Characteristics In Preparation For A National Weightlifting Competition, Donald Marsh

Electronic Theses and Dissertations

The primary aim of this study was to examine the time course of change in muscle morphology and vertical jump performance in weightlifters preparing for a national competition. The secondary aim of this study is to examine how perceived recovery and stress state corresponds with alterations in training load leading up to competition. Eleven Olympic Training Site weightlifters completed a 4-week peaking phase for a national competition. Body mass, stress and recovery psychometric measures, and unloaded/loaded (20kg) squat jump height (SJH) were measured weekly and at the competition site. Vastus lateralis cross-sectional area (CSA), muscle thickness (MT) and pennation angle …

The Salivary Alpha-Amylase Response To Resistance Training, Asher Flynn

Electronic Theses and Dissertations

The purposes of this dissertation were to investigate the response of salivary alpha-amylase to a single resistance training session and to a week-long resistance training over-reaching protocol. The major findings of this dissertation are as follows:

Study 1 – A single resistance training session consisting of 5 sets of 10 repetitions of squat and bench press at 95 percent of repetition maximum creates a statistically significant increase in salivary alpha-amylase concentrations.

Study 2 – Two resistance training sessions consisting of 5 sets of 10 repetitions of squat and bench press at 95 percent of repetition maximum within 5 days does …

The Effects Of Branched Chained Amino Acid Supplementation On Acute Markers Of Fatigue And Performance, Joseph Walters

Electronic Theses and Dissertations

The purposes of this dissertation were to investigate the acute effects of branched-chain amino acids on psychological, physiological, and subsequent performance changes following high volume resistance training. The rationale for this study design was based on abrupt or contiguous training/ competitions that specific athletes encounter in a competitive season. This study design also sought to fill some gaps in the scientific literature concerning the efficacy of BCAAs for subjective fatigue in a resistance training paradigm. To address the purposes of this dissertation, a one-week study was conducted on resistance trained males, in which half of the subjects were randomly selected …

Barbell Trajectory And Kinematics During Two International Weightlifting Championships, Aaron J. Cunanan

Electronic Theses and Dissertations

Several methods have been used in the scientific literature to study the weightlifting pull. Broadly, these methods are used to measure kinematic or kinetic variables exhibited by the lifter, the barbell, or the lifter-barbell system. However, there is an apparent disconnect between weightlifting research and coaching practice that may reduce the perceived benefits of technique analysis among coaches and present some challenges for coaches who seek to incorporate technique analysis into their coaching practice. Differences and trends in the technique of competitive weightlifting performances are apparent from the available literature. However, there are also gaps in the literature due to …

Effects Of Neuromuscular Fatigue Resulting From Repeat Sprint Exercise Among Trained Cyclists On Measures Of Strength And Power Performance, Robert B. Blaisdell

Electronic Theses and Dissertations

The purpose of this dissertation is to better understand the role of repeated-sprint ability (RSA) and resulting fatigue in cyclists; how it relates to measures of aerobic power and strength and power performance indices- due to the nature of cycling competitions and the necessity of RSA for success.

The first part of this dissertation attempted to elucidate the relationship between RSA and aerobic power and strength/ power measures in competitive cyclists. The purpose was to potentially illustrate the importance of the inclusion of strength and power training in the training regimen of cyclists. The findings showed several statistically significant relationships …

Individual Eeg Asymmetry As A Predictor Of Hydration Status During Exercise In The Heat, Ayano Katayama

Electronic Theses and Dissertations

Hydration behavior varies among individuals; continuous and correct fluid consumption behavior prevents decreased physical performance and severe dehydration, especially during extended exercise and hot environments. Therefore, the purpose of the present study was to examine individual frontal alpha electroencephalographic asymmetry index (FAI) score in eu-hydrated, hypo-hydrated, and exercise in well-trained men and assess if there is a correlation between FAI score and individual ad libitum fluid consumption behavior. Subjects were kinesiology major college students ranging from 21 to 29 years of age. Subjects were categorized either approach group (n = 8) with resting FAI score more than 0 or avoidance …

The Influence Of Chronic Branched-Chain Amino Acid Supplementation On Measures Of Central And Peripheral Fatigue In Training Athletes, Tara K. Whiton

Electronic Theses and Dissertations

Branched-chain amino acid (BCAA) supplementation may improve recovery from competitive endurance training by reducing symptoms of central and peripheral fatigue. The purpose of this dissertation was to provide evidence for the use of BCAAs as a training nutrition strategy in order to improve recovery from training and further drive adaptive processes to training by increasing readiness to train. Collegiate distance runners undergoing intense competitive endurance training were monitored for symptoms of muscular soreness and psychological stress through a rated soreness chart and the Daily Analysis of Life Demands for Athletes Survey (DALDA) while taking either a BCAA supplement or a …

The Effect Of Functional Movement Control On Patient-Reported Outcomes In Individuals With Non-Arthritic Hip Pain, Ryan Mcgovern

Electronic Theses and Dissertations

Purpose: Both the single leg squat test and step-down test assess for deficiencies relating to the hip and surrounding musculoskeletal structures and could be useful in the evaluation of functional movement control for individuals with non-arthritic hip pain. The purpose of this study is to determine if individuals with non-arthritic hip pain that improve functional movement control during the single leg squat test and step-down test have better patient-reported outcomes than those that do not improve, following the implementation of a rehabilitation intervention and a standardized home-exercise program.

Subjects: Forty-six individuals (31 females; 15 males) with a mean age of …

Phase Specific Changes In Rate Of Force Development And Muscle Morphology Throughout A Block Periodized Training Cycle In Weightlifters, Dylan Guidetti Suarez

Electronic Theses and Dissertations

The purpose of this study was to investigate the kinetic and morphological adaptations that occur during distinct phases of a block periodized training cycle in weightlifters. Monitoring data from nine experienced collegiate weightlifters was examined retrospectively. Isometric mid-thigh pull and ultrasonography results from pre and post three specific training phases within a macrocycle leading up to a competition were compared. Changes in isometric rate of force development and vastus lateralis cross-sectional area reflected the expected adaptations of each training phase.

Comparison Of Post-Activation Potentiation Methods On Power And Sprint Acceleration, Aaron Piper

Electronic Theses and Dissertations

Post-activation potentiation (PAP) is a stimulus used to enhance performance by performing specific interventions prior to subsequent explosive movements. The purpose of this study was to determine the effect of different PAP methods on power and sprint acceleration in resistance trained, college-aged men and women. A total of 13 subjects participated in the study. After determining back squat 1 repetition max, subjects returned for testing on separate days to complete one of four interventions (dynamic resistance, weighted plyometric, isometric, or control) in a randomized order. A standardized warmup was given, followed by a baseline countermovement jump (CMJ) and 20-meter sprint. …

Hemoglobin A1c Levels And Sport Participation In Children With Type 1 Diabetes., Amy Kozerski

Electronic Theses and Dissertations

This study’s purpose was to determine a possible difference in hemoglobin A1c levels and sport participation in children with type 1 diabetes. Patients with provided consent via an iPad electronic informed consent/assent (preamble) completed a physical activity and sport participation survey. The survey was linked to their medical chart including demographic and diabetes medical history (e.g. HbA1c). The analyses provided a sample of 120 participants, 40 in the no sport participation group and 78 in the sport participation group with 56 females and 64 males, with an average age12.94±2.8 years. An independent sample t-test, removing one outlier from the …

The Impact Of Palm Cooling Gloves On Cardiovascular, Thermoregulatory, Metabolic, Perceptual, And Ergogenic Responses Produced From Rowing Ergometry., Ian O'Brien

Electronic Theses and Dissertations

Subjects (n = 34) did three rowing workouts of up to eight 2- minute stages separated by 45-60 second rests. Cardiovascular, ergogenic, thermoregulatory, perceptual and metabolic responses to workouts may be aided by intermittent palm cooling. Subjects received one of the following treatments per workout in a randomized sequence: no palm cooling, intermittent palm cooling during workouts, or palm cooling applied intermittently during workouts and post-exercise recovery. Methods: Palm cooling entailed intermittent cold (8-11o C) against the palmar surface of subject’s hands. Workouts began with 10 minutes of rest, followed by a 10-minute low- intensity warm-up and the workout, concluding …

The Relationship Between Campus Wellness Center Usage And Symptoms Of Depression In College Freshmen, Allison Leonard

Electronic Theses and Dissertations

There is limited research done on the relationship between the program utilization at a campus wellness facility and the symptoms of depression in college freshmen. College students have been found to have a higher prevalence of depressive symptoms than the general population, possibly due to the stressors college life can add. Studies have been done on the effects of physical activity as an intervention for depression as well as on the benefits of campus wellness facilities; however, there have been few studies that look at both campus recreation and depression. The author’s purpose for this study was to see if …

Using Maximum Power As A Variable For 1rm Prediction In The Squat And Bench Press, Sean O'Connor

Electronic Theses and Dissertations

Many Strength and Conditioning (S&C) coaches utilize a one-rep max (1RM) exercise test to gauge the maximal strength of athletes, and then prescribe resistance training programs based on a relative percentage of 1RM to obtain strength or power adaptations. However, many S&C coaches have raised questions regarding the safety and necessity of a 1RM test. Attempts to mitigate the weaknesses of 1RM testing have led to other methods of testing including repetition max testing (3RM, 5RM, 10RM, etc.) as well as load/velocity profiling. The main purpose of this study is to determine if 1RM can be accurately estimated from maximal …

Impact Of Concussion And Orthopedic Injuries On Physical Activity And Quality Of Life After Sport Retirement, Makenna Hancock

Electronic Theses and Dissertations

CONTEXT: Concussions and orthopedic injuries represent a significant risk related to participation in collegiate athletics. These injuries can create significant long-term impairments and functional limitations which may also decrease former athletes’ quality of life (QoL) and inhibit their ability to engage in physical activity. OBJECTIVE: To investigate QoL and physical activity levels of former collegiate athletes with a history of concussion and orthopedic injury, orthopedic injury only, and healthy controls. DESIGN: Descriptive, experimental study.
SETTING: Daily life as former National Collegiate Athletic Association Division I collegiate athlete.
PARTICIPANTS: Former Division I collegiate athletes competing in football, women’s soccer, baseball, softball, …

Changes In Vertical Jump Components Utilizing The Myvert Device In Female Collegiate D-1 Volleyball Players, Samantha Modrick

Electronic Theses and Dissertations

The purpose of this study was to determine daily and weekly variations in vertical jump (VJ) volume and VJ height over the course of a season for female collegiate division 1 volleyball players using Vert® technology. Sixteen volleyball player’s external load was monitored through jump count, average VJ height, number of VJs completed over 20-inches, and the ratio of VJ height relative to maximum tested VJ height. The VJ parameters were compared between practices and games, and between the various position groups (outside hitters, middle blockers, libero/defensive specialist, setters). A large increase in jump count observed during pre-season, peaked at …

Diagnosis And Rehabilitation Of Multiple Hip Pathologies In A Division I Football Player: A Case Study, Kelsey E. Sanders

Electronic Theses and Dissertations

Objective: To present a diagnosis and rehabilitation plan for femoroacetabular impingement (FAI), labral tear, and sports hernia in a Division I college football player. Background: A 21-year-old NCAA Division I college football player experienced a rare combination diagnosis of hip FAI, labral tear and sports hernia. Overlapping signs and symptoms proved difficult to conclude a diagnosis. The patient underwent three months of conservative treatment with no relief before electing to undergo surgery. Differential Diagnosis: Hip flexor strain, osteitis pubis. Treatment: A combination of conservative treatment such as activity modification, anti-inflammatories, therapeutic modalities, injections, and rehabilitation were unsuccessful in relieving symptoms …

Ultrasound Measured Flexor Muscle Thickness In The Forearms Of Rock Climbers, Michael Marsala

Electronic Theses and Dissertations

PURPOSE: To examine differences in the forearms of rock climbers using ultrasound to measure the muscle thickness of the finger flexors. METHODS: A total of 33 participants were recruited, 22 climbers (22.23 years; 68% male) and 11 controls (21.8; 55% male). Climbers provided self-reported ratings of their climbing ability, skill level, and preferred mode of climbing (e.g. sport climbing vs. bouldering). Anthropometric measures, including body fat percentage, were measured in all participants. Ultrasound measurements were taken with the participant lying on their back on a padded table with their dominant hand supinated. Muscle thickness measurements were taken at the forearm …

Comparisons Between Movement Onset Identification Methods Used In Isometric Mid-Thigh Pull Test, Junshi Liu

Electronic Theses and Dissertations

This dissertation aimed to explore the usefulness of using force derivatives for onset detection in the isometric mid-thigh pull test. First, we examined applications of three differential calculus principles, first and second derivative, and curvature using visual detection as a reference under different baseline conditions. Second, we compared the best derivative method to a threshold-based method using visual detection as a reference. Results of our first investigation showed trivial differences between many differential calculus methods and visual detection. However, statistical differences exceeding a trivial effect was observed when instantaneous force and rate of force develop were examined. Through the first …

Relationship Of The Srss Questionnaire With Physiological And Performance Measures, Alec Perkins

Electronic Theses and Dissertations

The overall purpose of this thesis was to validate the SRSS questionnaire. This was accomplished by conducting a single investigation using eleven well-trained weightlifters with at least one year of competition experience. These weightlifters completed five testing sessions over the course of five microcycles leading up to a competition. Every testing session took place on Monday morning prior to regular training and included: hydration testing, SRSS questionnaire, blood draws followed by a standardized warm-up protocol and squat jumps (SJ) with 0kg and 20kg. While the majority of SRSS recovery and stress items did not change with changes in VL or …

Comparison Of Muscle Physiology And Performance Outcomes From Either Relative Intensity Or Repetition Maximum Training, Kevin Carroll

Electronic Theses and Dissertations

The main purpose of this dissertation was to compare performance and physiological outcomes of between a repetition maximum (RM) and a relative intensity using sets-and-repetitions (RI_SR) resistance training (RT) program in well-trained lifters. Fifteen subjects underwent RT 3 d·wk^-1 for 10-weeks in either a RM group (n=8) or RI_SR group (n=7). The RM group achieved a relative maximum each day while the RI_SR group trained based on percentages. Testing included percutaneous needle biopsies of the vastus lateralis, ultrasonography, unweighted (g to assess within and between-group alterations. RI_SR from pre-to-post yielded statistically significant increases in …