Sports Sciences Commons^™

The Effect Of A 5-Week Concurrent Training Program On Acft Scores, Ruck March Times, And Aerobic Capacity In Army Rotc Cadets, Cody Durbin

Dissertations and Theses @ UNI

Most Army ROTC programs conduct physical training (PT) only 3 days per week and no study has directly compared the effects of conducting PT 5 days per week on ACFT scores, ruck march performance, and aerobic capacity. Past research has indicated greater performance adaptations with a concurrent training program and some research has shown that current ROTC PT programs may not be optimal in physically preparing ROTC cadets. Purpose: To examine the effectiveness of a 5-day per week periodized tactical strength and conditioning program on ACFT scores, and aerobic capacity in Army ROTC cadets. Methods: Eight ROTC cadets from UNI …

The Flow Experience Of Adults Age 50 And Older In Recreational Doubles Pickleball, Glynis Worthington

Dissertations and Theses @ UNI

Pickleball, often described as a combination of tennis, badminton, and ping-pong, is America’s fastest-growing sport. An estimated 4.8 million players enjoyed the game in 2021, 40% greater than in 2019 (Sports & Fitness Industry [SFIA], 2022). The game is especially popular with older players when played recreationally (for fun rather than prepare for or participate in competitions) in a doubles format (four players per court) (USA Pickleball Association [USAPA], 2022). This study identifies the degree adults age 50 and older experience flow (Csikszentmihalyi, 1990) while playing recreational doubles pickleball.

The Long Dispositional Flow Scale – Physical (DFS-2) was used to …

A Familiarization Protocol: Repetitions In Reserve, Elvert A. Wise

Dissertations and Theses @ UNI

Research suggests RIR is a valid and reliable method to prescribe and manipulate RT intensities. However, the literature reviewed revealed that a protocol had not been developed or introduced that allows practitioners to educate athletes or recreational populations to implement the RIR scale. Purpose: Thus, this study aimed to develop a familiarization protocol through synthesized research-study findings and evaluate its efficacy in resistance-trained populations.

Methods: Participants were males (n = 9) with > 3 years of RT experience. The study consisted of 5 sessions. Participants performed the bench press and v-squat for four sets each at varying intensities. The PG followed …

Effects Of Transcranial Direct Current Stimulation Of The Motor Cortex On Cycling Time Trial Performance And Prefrontal Cortex Activation, Abigail Hope Auten

Dissertations and Theses @ UNI

Transcranial direct current stimulation (tDCS) is a neuromodulatory technique that delivers low levels of a constant current via scalp electrodes to specifically targeted areas of the brain. The effects of tDCS on whole-body exercise performance has been of interest in recent literature. Purpose: To investigate if tDCS, administered via Halo Sport, influences time trial performance in trained cyclists, and if changes in exercise performance are associated with prefrontal cortex (PFC) activation and/or muscle oxygenation (SmO2). Methods: Twelve recreationally trained cyclists volunteered to participate in two 10km time trials following 20 minutes of tDCS or a sham condition. Results: T-tests showed …

Indices Of Metabolic Stress Following Resistance Exercise, Steven Alexander Long

Dissertations and Theses @ UNI

The purpose of this study was twofold: 1). to evaluate the metabolic responses to varying volume load (VL), manipulated through relative training intensity and 2). to evaluate the metabolic response to training via direct and indirect methods to assess the application potential of non-invasive methods. Recreationally trained male weight lifters (n = 11) volunteered to participate in this resistance training (RT) study. During three separate testing sessions, participants completed three sets of repetitions of the barbell bicep curl exercise to technical failure with short inter-set rest intervals (60 seconds). Participants were randomly assigned one of three training intensities immediately prior …

Effects Of A Sport Nutrition Education Intervention On Nutritional Knowledge, Dietary Behaviors, And Self-Efficacy In Ncaa Division I Softball Players, Kylie Wilson

Dissertations and Theses @ UNI

Optimal nutrition is vital in sport. The purpose of this study was to investigate the effects of a sport nutrition education intervention (SNEI) on nutritional knowledge, dietary behaviors, nutritional self-efficacy, body composition, and performance in National Collegiate Athletic Association Division I female softball players, and to measure retention and effects of this knowledge after the SNEI period. Seven participants were assessed using a Dietary Behaviors and Nutritional Knowledge questionnaire, Self-Efficacy questionnaire, BodPod measurement, exit velocity, and weekly intention surveys. Two-way mixed repeated ANOVAs were used to determine the impact of a five-week SNEI on an intervention group as compared to …

Physiological Performance Characteristics Of Universal Tennis Rating (Utr), Savanna Storm Hunt

Dissertations and Theses @ UNI

The purpose of this study was to create a physiological profile based on UTR through a series of tests to aid coaches in improving the performance of their athletes of any UTR level and to prepare the athletes physiologically for the level above. The UTR patent details skill and tactical development of players at each level as well as a few psychological skills. Physiological skills are only vaguely mentioned and not quantified creating a desire for a physiological profile. It has been previously agreed upon that high capabilities in linear speed, agility, power, anaerobic, aerobic, and strength are correlated with …

Adult- And Peer-Created Motivational Climates In Sport And Injury Rehabilitation, Rachel Majewski

Dissertations and Theses @ UNI

The motivational climate is the environment, within an achievement setting, created by influential individuals (e.g., coach, athletic trainer, peers) through situational cues, expectations, feedback, and rewards. The way individuals within the setting interpret the motivational climate influences emotions, values, and behaviors which then directly encourages a specific state of participation. Coaches, athletic trainers, and peers need to be aware of the motivational climate they generate and the potentially constructive and detrimental effects on athletes in sport and injury rehabilitation.

The purpose of this study was to examine the relationships between the motivational climate in sport, sport commitment, and injury occurrence. …

Effects Of Lumbopelvic Stabilization Program In Young, Non-Elite, Community-Based Gymnasts, Miranda Katherine Pomije

Dissertations and Theses @ UNI

Context: Gymnasts are seen practicing and competing even though they are reporting high levels of low back pain that can hinder their career if not resolved. Therefore, it may be beneficial for gymnasts to train key muscles in the lumbopelvic region to decrease those symptoms and prevent future injury. This study assesses the effects of lumbopelvic stabilization training in young, non-elite, community-based gymnasts. Objective: Measure the effectiveness of core stability training on lumbar muscle endurance, lumbo-pelvic stabilization, abdominal strength and balance in adolescent female gymnasts and examine the effect of these interventions on the occurrence of low back pain. Design: …

Head Above Water Weighing: A Valid Method To Measure Body Fat Storage?, Molly Lin Hussey

Dissertations and Theses @ UNI

Hydrostatic weighing using underwater weighing with full lung expiration has been established as a valid method to assess body composition; however, many people do not prefer to submerse their heads in water due to various reasons. Keeping the head above water as a method for hydrostatic weighing at full lung capacity has been tested but has not been accepted as an alternative method. Purpose: The main purpose of this study is to determine if hydrostatic weighing with the head above water at residual volume could provide valid estimates of total body fat. Methods: Fifty-eight subjects (F=29. M=29) participated …

Comparison Of Forward Lean During Bulgarian Split Squat At High And Low Box Heights, Craig Konrardy

Dissertations and Theses @ UNI

This study examined the difference between forward lean while performing the Bulgarian Spilt Squat at different box heights of 40 cm and 20 cm. The study also compared the maximal force output of the front foot during the BSS at the different heights.

Fifteen male athletes (standing height=180.73 ± 6.67 cm; mass= 80.45 ± 7.63 kg; age=18.55 ± 0.69 years) volunteered to complete the study. The participants performed three repetitions of each leg at two different heights of the Bulgarian Split Squat with 30% of self-reported back squat 1RM. Participants stood on a force plate to report maximal force during …

Biomechanical Differences In The Weightlifting Snatch Between Successful And Unsuccessful Lifts, Jack Rummells

Dissertations and Theses @ UNI

The purpose of this study was to determine what differences exist between several kinematic variables between failed and successful attempts in the snatch lift. Six female Weightlifters at the 2015 American open were measured for kinematic variables via videotape during competition. The results show that differences existed in the angle of the shoulder at peak barbell height and the catch height, along with the amount of separation between the lifter and barbell at peak height. Significant differences were also found at the angle between the barbell and lifter center of mass. This study was a first step toward understanding the …

Comparison Of Three Base Stealing Techniques In Division I Collegiate Baseball Players, Sean Boss

Dissertations and Theses @ UNI

The problem that baseball coaches face is which base stealing technique is most effective. The purpose of this study is to compare three base stealing techniques (crossover step (CS), jab step (JS), and drop step (DS)) on initial sprint kinematics and steal time in Division I baseball players. This paper will address the stretch shortening cycle (SSC) and its effects, the false step technique, sprinting technique, and acceleration. This research will provide coaches with the knowledge and educate them on which technique provides greater sprint speeds. The method for research was experimental, repeated measures design to determine the effects of …

Differences In Landing Impulses Between The Traditional And Swing Blocking Style In Volleyball, Jana Geertruida Braakhuis

Dissertations and Theses @ UNI

Blocking is an important part in the game of volleyball. Previous research has shown that the swing blocking style leads to a greater jump height, penetration over the net and effective blocking area compared to the traditional blocking method. No available research has been found investigating the differences in landing. The purpose of this study was to examine the differences in landing impulses, landing time and vertical ground reaction forces (vGRF) between the traditional and swing blocking style in volleyball. Therefore, eight female collegiate volleyball players were filmed in high definition at 60Hz performing successful trials of both blocking styles. …

Collegiate Athletes' Perceptions Of Social Support And Athletic Trainer-Coach Conflict, Nathan Newman

Dissertations and Theses @ UNI

Following an injury, athletes go through a cognitive evaluation to determine if resources are present to manage any potential stress attributed to being injured (e.g., Wiese-Bjornstal et al., 1995). This evaluation determines both behavioral and emotional responses to the injury and can be influenced by a number of factors, including social support (e.g., Wiese-Bjornstal et al., 1998). Social support serves as a resource that allows injured athletes to make a positive cognitive evaluation (e.g., Wiese-Bjornstal et al., 1998). Another factor that could influence the cognitive evaluation is interpersonal conflict. In athletics, interpersonal conflict is present in the form of athletic …

A Comparison Of Hip And Knee Torques Produced During A Maximal Effort Full And Partial Back Squat, Jordan Alexander Williams

Dissertations and Theses @ UNI

This study examined the levels of hip and knee torques produced during a one repetition maximum (1RM partial) squat and full squat in order to determine if there would be a difference in the peak torque created at the two depths.

Eight male athletes (standing height = 1.84 ± 0.07 m; mass = 87 ± 14 kg; age 23 ± 2.1 years) volunteered for the study. Each subject performed a 1RM squat at full squat (as low as the participant could go, at least 0° or thigh parallel in relation to the ground) and partial squat (thigh at 45° in …

The Effect Of Soft Tissue Oscillation Therapy On The Management Of Pain Associated With Delayed Onset Muscle Soreness, Jenifer Ann Shoultz

Dissertations and Theses @ UNI

Context: Soft tissue oscillation therapy is utilized in the medical profession with limited research to support its use. This study evaluates the effectiveness of soft tissue oscillation therapy on musculoskeletal pain associated with DOMS, among a healthy, physically active population. Objective: Evaluate the efficacy of soft tissue oscillation therapy compared to a placebo in the management of pain associated with musculoskeletal injury. Design: Experimental Crossover, Repeated Measure Design. Participants: Thirty physically active volunteers with a mean age 21.30 ± 1.47. Methods: Participants were induced with delayed onset muscle soreness to their elbow flexors of the non-dominant arm. Participants were randomly …

Development Of An Ankle Function Model, Kelli R. Snyder

Dissertations and Theses @ UNI

Lateral ankle sprains (LAS) represent the most common orthopedic injury treated by athletic trainers, yet there is no consensus regarding the measurement of the effectiveness of care (e.g. outcomes). Further compounding this problem is the repetitive nature of LAS, often referred to as "functional" or "chronic" ankle instability (FAI, CAI, respectively). Although a common entity in practice and research, FAI is inconsistently defined and assessed. Essentially, athletic trainers are neglecting to address one of the most important issues identified in their profession (outcomes) for the most common injury for which they provide care (LAS). Therefore, the purpose of this research …

Disordered Eating Habits And Extreme Weight Loss Techniques In Collegiate Wrestlers: A Qualitative Analysis, Jaime Marie Mayer

Dissertations and Theses @ UNI

Wrestlers have often been targeted as high-risk athletes for developing eating disorders. Research has found that wrestlers do practice extreme weight loss and disordered eating behaviors that are consistent with eating disorders. However, little evidence suggests that wrestlers also possess the psychological aspect that is required in order for a person to be diagnosed with an eating disorder according to the DSM (2000).

Many times researchers conclude that few wrestlers meet the criteria for eating disorders, but they participate in many behaviors that put them at risk of developing an eating disorder in the future. Very few if any researchers …

The Effects Of Bat Velocity And Bat Quickness On Offensive Statistical Performance In Ncaa Division I Female Softball Players, Thomas Manford Flack

Dissertations and Theses @ UNI

The purpose of the study was to examine the effects of bat velocity and quickness on offensive statistical performance of six members of the University of Northern Iowa's women's Division I softball team. Each of the participants was requested to engage in a warm-up and stretching routine to minimize injuries due to the high force generated during isometric contraction and maximal swings. Data collection procedures were performed in one session for each subject. Reflective spherical markers were placed on the distal end of the softball bat, the proximal end of the bat as well as an additional marker in the …

Substance Use And Injury With College Athletes: Does Injury Affect Perceptions?, Kristine Johnson

Dissertations and Theses @ UNI

Collegiate athletes may perceive the characteristics of substances differently following an injury. Therefore, the purpose of this research was to determine whether perceptions of substance use among collegiate athletes change after an injury occurs. The study also examined differences between sex, scholarship status, and academic level on perceptions of substance use. A total of 141 Division I college athletes participated in this study, with 96 completing the post-test. They were asked to complete a Perceptions of Substance Use Survey in the fall and again in the spring; participants' injury data was collected over a 6 month period from athletic trainers. …

Examining The Intrinsic Motivational Level Of Task And Ego Goal Oriented Athletes In The Xl Sports Acceleration Program, Kira Melisa Werstein

Dissertations and Theses @ UNI

Acceleration programs are a new and popular tool used by youth athletes to prepare for upcoming sports seasons. Acceleration programs train athletes in the areas of speed, agility, power, coordination, and strength. Each of these aspects is important in the development of an athlete and effects athletic performance. It is important that acceleration programs also consider intrinsic motivation, because it will help advance the performance of each athlete. The purpose of this study is to examine motivational levels in task and ego goal oriented athletes over the length of a session at the XL Sports Acceleration Program. The Task and …

Effects Of Acute Static Stretching On Anaerobic Performance Of The Upper Body In Collegiate Wrestlers, Karl Bratland

Dissertations and Theses @ UNI

Stretching prior to physical activity is common in sports and recreational exercise. Athletes, coaches, trainers, and physicians recommend stretching in an effort to both prevent injury and enhance performance. However, much of this information is based more on anecdotal evidence and intuition, rather than scientific evidence. Researchers have found that typical pre-exercise stretching protocols do not reduce the incidence of injuries (Pope, Herbert, Kirwan, & Graham, 2000). Studies have also found decrements in various performance measures such as maximal strength (Kokkonen, Nelson, & Cornwell, 1998) and explosive force and jumping performance (Young & Elliot, 2001; Young & Behm, 2003) after …

The Impact Of A C.A.R.E. Based Martial Arts Class On Students' Academic Achievement, Peer Relationships, And Social Interactions, David Hite Jr.

Dissertations and Theses @ UNI

What is the goal of education in America today? Why is education so important to our society? Why do we spend millions of dollars each year towards the success of America's educational system? What processes and procedures should be employed to insure an efficient and effective education for all individuals? These questions and more arise as we consider the current academic, social, and economic climate of America, as well as the rest of the world; and the role education has played in shaping our past, impacting our present, and directing our future as individuals of a free society. Abraham Lincoln …

Season Long Evaluation Of Relationships Between Several Variables And Hitting Efficiency In Four Division I Volleyball Players, Patricia Raelyn Dietz

Dissertations and Theses @ UNI

Throughout a collegiate volleyball season game performance fluctuates game to game and even match to match. The purpose of this study was to investigate relationships between several anthropometric and independent variables and hitting efficiency in four Division I athletes. Subjects were four female Division I volleyball players who participate in a hitting position. Subjects were tested weekly on vertical jump approach height (VJ), reactive strength index (RSI) using an AMTI force plate, BM (BM), and body composition (BF%). Pearson product moment correlations showed no significant correlations between hitting efficiency and each of the indpendent [sic] variables for each individual or …

Development Of A Core Stability Model, Tricia Lynn Majewski-Haak

Dissertations and Theses @ UNI

The concept of core stability has transcended physical medicine as well as health and physical performance. It is now considered a fundamental component of general fitness and rehabilitation programming. However, the definition of core stability, its components, and the assessment techniques have not been established. The purpose of this project was to develop a comprehensive core stability model addressing its definition, components, and assessment techniques. The methods utilized in this study incorporated the Delphi technique to develop a unified core stability model.

A group of 15 content experts from United States and Canada, representing a variety of disciplines, participated in …

The Effect Of Three Rest Intervals After A High Intensity Training Protocol On Speed And Strength Variables In Division I Track And Field Sprinters And Jumpers, Eric Lee Hanenberger

Dissertations and Theses @ UNI

The purpose of this study was to examine the effect of three different recovery periods (2, 4 or 6 days) after a high intensity strength training protocol on speed and strength variables in Division I track and field sprinters and jumpers. Methods: Research participants (RP) were assessed in a lower body strength test using a back squat one repetition maximum (lRM). A week of recovery was administered following the lower body strength test. A pre-test was administered to establish baseline values on speed and strength variables. Speed variables included 18.3, 36.6 and 54.9 m sprint times and SPLIT 1 (18.3 …

The Relationship Of Time Spent Training At Three Physiological Loads And Performance In Endurance Athletes, Nicholas L. Maas

Dissertations and Theses @ UNI

The purpose of this study was to determine the relationship between time spent at three training loads and running performance during a Division I collegiate cross-country season. Subjects were fifteen collegiate level male and female runners all with competition experience of ≥3 years.. Subjects HRmax was determined during a treadmill run to exhaustion. After the completion of maximal testing, the following HR zones were determined; 1) light intensity(< 80% of HRmax), 2) moderate intensity (between 80-90% of HRmax), and 3) High intensity (> 90% of HR max). During the training season, the amount of time spent at in each heart rate zone was determined for each runner. Correlations between the amount of time spent in …

The Relationships Between Four Strength Qualities And Sprint Performances In Division I Sprinters And Jumpers And Recreationally Active Subjects, Steven Eugene Blocker Jr.

Dissertations and Theses @ UNI

The purpose of this study was to compare four separate strength and speed qualities between Division I sprinters and jumpers and recreationally trained athletes. Nine Division I sprinters and jumpers and 9 recreationally active males participated in the study. Methods: Subjects performed 54.9-m timed trials. The 0-18.3 m (Split 1) time and 36.6-54.9 m (Split 2) time were recorded. Subjects performed multiple strength related tests. Back squat one repetition maximum ( 1 RM), 1 RM relative to body mass (}RM-Rel), peak power during jump squats with 10 and 30% of lRM (PPl0 and PP30), PP 10 and PP30 relative to …

The Contribution Of Socio-Economic Status And Maturity On Injury Risk In Youth Soccer, Kristin Noel Stoneberg

Dissertations and Theses @ UNI

Soccer is considered the universal sport as it is played by youth in nearly every nation around the world. With such a large number of children involved in soccer, injury is inevitable. Many possible risk factors have been identified, but very little current data address other risk factors such as maturity and socio-economic status (SES). The purpose of this study was to determine injury rates and the association between injury, maturity, socio-economic status, and other risk factors in youth soccer players. There were 440 youth soccer players ages 6-18 years involved in the cohort sample and a sub-sample of 102 …