Kinesiology Commons^™

The Effects Of Differing Bicycle Frame Geometry On Muscle Recruitment Strategies And Power During A 30-Second Wingate Anaerobic Test, Patrick Hills-Meyer

Masters Theses

The purpose of this study was to test how changing the bicycle frame geometry; from a shallow frame geometry [seat tube angle (STA) of 72°] to a steep frame geometry (STA of 82°) affected the electromyographic (EMG) signal of the hamstrings [biceps femoris (BF) and semitendinosus (ST) muscles] and the quadriceps [vastus medialis (VM) and vastus lateralis (VL)] and power (max, mean, min, and, % drop) during a Wingate anaerobic test (WAT). To measure the muscle recruitment and power, 12 experienced triathletes were prepped with surface electrodes to measure EMG amplitude and an electrogoniometer to measure knee joint angle while …

Effects Of Warm-Up And Stretching On Vertical Jump Performance And Leg Power, Douglas C. Samuelson

All-Inclusive List of Electronic Theses and Dissertations

This study compared the effects of a general warm-up, a general warm-up and sitting quietly, a general warm-up and static stretching, and a general warm-up and ballistic stretching protocols on vertical jump performance and leg power. Eleven National Collegiate Athletic Assoiciation (NCAA) Division 1-A female volleyball players served as subjects. The subjects performed four treatments prior to the three vertical jump trials, consisting of a general warm-up, a warm-up and sitting quietly, a warm-up and static stretch, and a warm-up and dynamic stretch. The subjects also performed a Sit and Reach test prior to and after each treatment to determine …

The Effects Of Plyometrics Training On Neuromuscular Responses And Ground Reaction Forces Surrounding The Knee, Barbara Mcdowell

Human Movement Studies & Special Education Theses & Dissertations

Several investigations have noted altered kinetic and neuromuscular landing patterns in adolescent female athletes following various plyometrics programs. The purpose of this study was to investigate the effects of a time-limited plyometrics training program on neuromuscular responses and peak vertical ground reaction force (PVGRF) in Division I collegiate soccer players. Sixteen (8 male, age=l9.38 ± 1.4 yrs, ht= 178.44 ± 8.99 cm, mass =80.38 ± 8.37 kg; 8 female, age=19.75 ± 0.71 yrs, ht=163.83 ± 4.30 cm, mass =62.13 ± 6.29 kg) athletes completed the testing protocol and plyometric training. Seven (3 male, average age=22.00 ± 1.00 yrs, average height=171.88 …

An Assessment Of High School Coaches Knowledge Of Exercise-Induced Asthma, Shannon L. Wilson

Human Movement Studies & Special Education Theses & Dissertations

Exercise-induced asthma (EIA) is a common disorder that occurs in individuals who compete in recreational activities. The purpose of this study was to determine the knowledge of EIA for high school athletic coaches. A 22 question demographic instrument was used for background information, and an 18 question multiple-choice assessment was used to assess knowledge of prevention, recognition and management of EIA. A panel of experts reviewed and modified the survey instruments, which were piloted at a local private high school prior to distribution. The survey was distributed to 250 high school coaches in the Hampton Roads area during a fall …

Qtc Is Associated With Obesity And Physical Activity Level For African American Females, C. Jayne Brahler

Health and Sport Science Faculty Publications

Long QT syndrome (LQTS) is an independent risk factor for cardiovascular or ischemic disease mortality. Obesity as a cause for acquired LQTS in otherwise healthy individuals is rapidly gaining the attention of the scientific community. African American people have a higher incidence of obesity compared to Caucasians, yet race-specific information is not available for their prevalence of LQTS. Chronic physical activity can help reduce the incidence of obesity, yet little is known about the effects of chronic physical activity on acquired LQTS. Subjects in this study were a volunteer sample of African American mothers (21-53 yr, n = 44) and …

The Effects Of Ankle Taping And Spatting On The Reaction Times Of The Supporting Musculature Of The Ankle Before And After Exercise In Healthy And Functionally Unstable Ankles, Jennifer I. Mckenzie

Human Movement Studies & Special Education Theses & Dissertations

Ankle taping is a common practice in the athletic training room, but there is minimal evidence to support its effectiveness in enhancing muscle activation. The purpose of this study was to examine the effects of ankle taping on muscle activation following sudden inversion in functionally unstable and healthy ankles before and after exercise. Fourteen recreational athletes with a unilateral functionally unstable ankle volunteered to participate. Surface EMG electrodes were placed on the peroneals and anterior tibialis muscles of both extremities. Each subject received four treatment conditions; ankle taping, ankle taping with spatting, spatting, and no tape in a randomly assigned, …

Effect Of Cycling Cadence On Economy At High Power, Carol Beatriz Ennser

Human Movement Studies & Special Education Theses & Dissertations

This study was designed to determine the most economical cadence for cyclists at high power outputs (> 300 W). Six cyclists and two triathletes (age 31.5 ± 8.8 yr, mass 76.9 ± 8.6 kg, VO₂max 4.84 ± 0.36 Lmin^·1, weekly training 318 ± 118 km) who were capable of riding a bicycle at a speed of 40 kph for 10 min (solo) participated in five tests on a bicycle ergometer. The preliminary test measured subjects' VO₂max. After that, subjects completed four trials, each at a predetermined cadence as follows: 60, 80, 100 and 120 …

The Effect Of Wearing Mouthguards On Vo2, Ventilation, And Perceived Exertion At Two Different Exercise Intensities, Jeffrey Scott Hurst

Theses and Dissertations

Objective: To assess the effects of wearing a protective mouthguard during exercise on ventilation and oxygen consumption.
Design and Setting: All participants performed a graded maximal exercise test on a cycle ergometer to determine peak oxygen consumption (VO2peak). Each participant also performed 6 submaximal exercise tests while wearing one of two facemasks (nasal or non-nasal breathing) and one of three mouthguard conditions (no mouthguard, boil and bite, custom-fit). Steady-state VO2, rate of perceived exertion (RPE), and other ventilatory values were measured at 60% and 80% of VO2max during each submaximal exercise test. All 6 submaximal exercise tests were completed within …

Effects Of A Tape Cast, Air-Stirrup, And An Air-Stirrup Applied Over A Taped Ankle On Dynamic Ankle Inversion, Justin K. Freeman

Theses and Dissertations

Objective: To compare the tape cast, and an Air-Stirrup/closed basketweave combination to the Air-Stirrup alone with respect to their effects on dynamic ankle inversion.

Design and Setting: This study used a repeated measures design with the independent variables being the exercise bout and the ankle support method (4 levels: no support, Air-Stirrup only, Air-Stirrup/closed basketweave, and tape cast). The 2 dependent variables were total inversion and maximum inversion velocity. Measurements were taken before and after an exercise bout, and all trials were conducted in the university's human performance laboratory.

Subjects: 16 subjects (11 male, 5 female, age 24.3 ± 1.8 …

Examination Of Adolescent Physical Activity And Overweight Levels , Maika Elizabeth Nelson

Theses and Dissertations

Research suggests declines in physical activity may occur after age 12. The purpose of this study was to determine the relationships between adolescent physical activity, BMI, and nutrition. Adolescents, ages 12-17 (N = 223), wore pedometers for 11 consecutive days and completed a nutrition survey, the Youth Adolescent Questionnaire. Activity levels did not differ among the ages of 12-17 year old adolescents, and boys were more active than girls. There was a low, but significant relationship between BMI and physical activity levels for both boys and girls. Energy intake was not related to BMI or physical activity levels in boys …

Pilot Study: Electromyographic Quadriceps/Hamstring Ratios During Drop Jumps, Randall L. Jensen

Conference Papers in Published Proceedings

No abstract provided.

Reliability And Validity Of Laser Distance And Velocity Determination During Running, Randall L. Jensen

Conference Papers in Published Proceedings

No abstract provided.

Public Posting As A Strategy To Increase Walking: A Worksite Intervention, Rayleen Earney, Timothy J. Bungum

Environmental & Global Health Faculty Research

Because most American adults do not meet recommended physical activity guidelines, the need for new and innovative strategies is apparent. The current study employed public posting in an attempt to increase walking behavior in a worksite setting. Pedometer generated data was publicly posted in a prominent location in the worksite. In our study that utilized a pre-experimental design, we found that walking steps were statistically higher during the intervention and in a post intervention period as compared to the baseline data. We conclude that the public posting of physical activity data has the potential to increase walking behavior.

Effects Of Static Stretching On Maximal Isokinetic Torque, Randall L. Jensen

Conference Papers in Published Proceedings

No abstract provided.

Microscale Investigation Of Thermo-Fluid Transport In The Transition Fil, Region Of An Evaporating Capillary Meniscus Using A Microgravity Environment, Kenneth D. Kihm, Jeffrey S. Allen, Kevin P. Hallinan, David M. Pratt

Mechanical and Aerospace Engineering Faculty Publications

In order to enhance the fundamental understanding of thin film evaporation and thereby improve the critical design concept for two-phase heat transfer devices, microscale heat and mass transport is to be investigated for the transition film region using state-of-the-art optical diagnostic techniques. By utilizing a microgravity environment, the length scales of the transition film region can be extended sufficiently, from submicron to micron, to probe and measure the microscale transport fields which are affected by intermolecular forces. Extension of the thin film dimensions under microgravity will be achieved by using a conical evaporator made of a thin silicon substrate under …

Inhibition Of Nitric Oxide Inhibition Of Nitric Oxide Synthase Does Not Alter Dynamic Cerebral Autoregulation In Humans, Rong Zhang, Thad E. Wilson, Sarah Witkowski, Jian Cui, Craig G. Crandall, Benjamin D. Levine

Exercise and Sport Studies: Faculty Publications

The aim of this study was to determine whether inhibition of nitric oxide synthase (NOS) alters dynamic cerebral autoregulation in humans. Beat-to-beat blood pressure (BP) and cerebral blood flow (CBF) velocity (transcranial Doppler) were measured in eight healthy subjects in the supine position and during 60° head-up tilt (HUT). NOS was inhibited by intravenous N G-monomethyl-L-arginine (L-NMMA) infusion. Dynamic cerebral autoregulation was quantified by transfer function analysis of beat-to-beat changes in BP and CBF velocity. Pressor effects of L-NMMA on cerebral hemodynamics were compared with those of phenylephrine infusion. In the supine position, L-NMMA increased mean BP from 83 ± …

Vasoconstrictor Reserve And Sympathetic Neural Control Of Orthostasis, Qi Fu, Sarah Witkowski, Benjamin D. Levine

Exercise and Sport Studies: Faculty Publications

Background—We tested the hypothesis that individual variability in orthostatic tolerance is dependent on the degree of neural and vasomotor reserve available for vasoconstriction.

Methods and Results—Muscle sympathetic nerve activity (MSNA) and hemodynamics were measured in 12 healthy young volunteers during 60° head-up tilt (HUT), followed by a cold pressor test (CPT) in HUT. Orthostatic tolerance was determined by progressive lower-body negative pressure (LBNP) to presyncope. The same protocols were performed randomly in normovolemic and hypovolemic conditions. We found that mean arterial pressure increased and stroke volume decreased, whereas heart rate (HR), MSNA, and total peripheral resistance (TPR) increased during HUT …

The Effects Of Stretching Prior To A 25-Yard Sprint In Female Swimmers, Melissa Lee Tippet

Dissertations and Theses @ UNI

While stretching is commonly part of the pre-performance routine in many sports including swimming, its function has been a controversial topic in the research community. Researchers have found decrements in performance measures such as force (Fowles, Sale, & MacDougall, 2000) and torque (Avela, Kyrolainen, & Komi, 1999) after stretching. While still controversial, some researches have also found decreases in one repetition maximum lifts (Kokkonen, Nelson, & Cornwell, 1998) and various jumping tests (Knudson, Bennett, Com, Leick, & Smith, 2001) after the inclusion of stretching.

Because there is much conflicting evidence in the literature pertaining to stretching and a lack of …

An Accurate Vo2max Non-Exercise Regression Model For 18 To 65 Year Old Adults, Danielle I. Bradshaw

Theses and Dissertations

The purpose of this study was to develop a regression equation to predict VO2max based on non-exercise (N-EX) data. All participants (N = 100), aged 18-65 years old, successfully completed a maximal graded exercise test (GXT) to assess VO2max (mean ± SD; 39.96 mL∙kg-¹∙min&sup-1; ± 9.54 mL∙kg-¹∙min-¹). The N-EX data collected just before the maximal GXT included the participant's age, gender, body mass index (BMI), perceived functional ability (PFA) to walk, jog, or run given distances, and current physical activity (PA-R) level. Multiple linear regression generated the following N-EX prediction equation (R = .93, SEE = 3.45 mL∙kg-¹∙min-¹, %SEE = …

The Effects Of Hypnosis And Guided Imagery On The Performance Of Track Athletes, Johnathan C. Mossey

All-Inclusive List of Electronic Theses and Dissertations

Although sport psychologists may utilize numerous hypnotic interventions and techniques intended to enhance the performance of athletes, many of these interventions have not been examined by systematic research. This exploratory study examined the effects of interventions using imagery and imagery plus hypnosis on the performance of track athletes. Twenty-nine students from a Midwestern high school track team were randomly assigned to one of two intervention groups: a) imagery and hypnosis or b) an imagery only group. Track team members at another high school served as the control group. The athletes in each group had their performance examined at track meets …

Does Exercise And Placement Technique Affect Triceps Surae Thermocouple Position As Measured By Magnetic Resonance Imaging?, Breanne A. Piatt

All-Inclusive List of Electronic Theses and Dissertations

Context: Intramuscular temperatures are commonly recorded with the use of implantable thermocouples. Currently, there are 2 techniques of inserting intramuscular thermocouples, a traditional technique, which inserts the thermocouple with a sterile hypodermic needle, then retracts the needle, and a catheter-assisted technique, which uses a spring-loaded catheter to insert the catheter then a thermocouple is fed through the catheter to target position. Objective: The purpose of this study was first to investigate whether or not target position is obtained with either insertion method. A second purpose of this study was to quantify the amount of movement that occurs after exercise. Lastly, …

A New Approach To Modeling Vertical Stiffness In Heel-Toe Distance Runners, Iain Hunter

Faculty Publications

Various models have been used to describe distance running technique. Among these, the mass-spring model is fairly simple to use and apply, but when employed as a model, does not predict vertical force accurately especially when a heel strike is exhibited. The purpose of this article is to demonstrate how the mass-spring model can be modified to provide a simple, yet accurate prediction of ground reaction forces in distance running. Sixteen subjects ran on a force instrumented treadmill. Vertical forces during running at a self-selected pace were collected at 500 Hz. Vertical stiffness was calculated using the conventional mass-spring model …

The Effect Of Active Exercise On Rectus Femoris Cooling Time, Blaine C. Long

All-Inclusive List of Electronic Theses and Dissertations

Context: The ability for cryotherapy to influence subcutaneous temperature has mainly been considered during resting skeletal muscle. However, most injuries occur when subcutaneous temperatures have been physically active. Objective: The purpose of this study was to evaluate the effect of ice on exercised rectus femoris musculature and the effect of exercise on cooling rectus femoris musculature to 1 0°C below resting temperature. Design and Setting: Two 2 x 2 repeated measures designs were used. The study was conducted in the Sports Injury Research Laboratory at Indiana State University. Subjects: Six (age= 26.0 ± 3.2 yrs, ht = 181.6 ± 2.4cm, …

Effectiveness Of A Practice Regimen For Decreasing Floor Rise Time In Older Adults, Deborah Waldschmidt Gibbs

Human Movement Studies & Special Education Theses & Dissertations

Some older adults experience extended periods of time lying on the floor waiting for help to arrive because they can not rise up independently (Campbell et al., 1990; Nevitt, Cummings, and Hudes, 1991). In many of these cases the older adults are not seriously injured, yet they lack the ability to rise up (Tinetti and Speechley, 1989; Vellas, Cayla, Bocquet, Pemille, and Albarede, 1987). Body Recall, an exercise program that teaches floor rising to older adults, advocates practicing getting up from the floor as a method for retaining this ability. The benefit of Body Recall is only anecdotal and has …

Pre-Exercise Fueling And Endurance: Effect Of A Pre-Exercise Almond-Raisin Beverage Versus A Commercial Sports Beverage On Performance In Trained Male Runners, Wendy N. Bazilian

Loma Linda University Electronic Theses, Dissertations & Projects

Aside from genetics and training, no factor plays as important a role in exercise performance as nutrition. What athletes consume before exercise longer than 60 min influences fuel use, perceived exertion (RPE), heart rate (HR) and time-to-exhaustion (TE). Ingesting carbohydrates (CHO) before exercise can delay exhaustion over placebo, but less is known about combinations of CHO and fat on fuel use and endurance. To date, there are few studies that systematically explore nutritious, whole food products like nuts and dried fruits as pre-exercise fuel sources for endurance exercise.

The purpose of this study was to compare the effects of 2 …

Technique Differences In Women's 100m Hurdles Between The Current Hurdle Height Of 84.0 Cm And A Proposed Hurdle Height Of 91.4 Cm, Jason M. Francis

All-Inclusive List of Electronic Theses and Dissertations

This study examined women's 100 rn hurdle technique modifications over the proposed hurdle height of 91.4 ern compared to the current hurdle height of 84.0 ern. The technique modifications were determined by the kinematic variables composed of linear displacements and angular displacements, and the performance variables composed of velocity measures and timing information. Three women collegiate 1 OOrn hurdlers at Indiana State University and one post collegiate hurdler training at Indiana State University volunteered for the study. The athletes finished a six-week conditioning program prior to the start of hurdle training. The athletes were given two weeks or four hurdle …

The Effect Of Local Muscle Fatigue On The Threshold Frequency Of An Electrically Induced Cramp, Marcus B. Stone

All-Inclusive List of Electronic Theses and Dissertations

Context: Muscle fatigue has been implicated as a factor in the cause of exercise associated muscle cramping. In an electrically induced muscle cramp, threshold frequency (TF) is the frequency of stimulation at which the cramp originates. Therefore, the TF of a fatigued muscle should shift from a previously established baseline. Objective: To determine the effect of local muscle fatigue on TF of electrically induced muscle cramp. Design: A 2 X 2 repeated measures design was used for this study. The independent variables were test (pre- and post-) and condition (control and fatigue). The dependent variable was TF of an electrically …

The Short-Term Effects Of Grade 1 And 2 Joint Mobilizations On Subject Pain Range Of Motion And Muscle Activity In The Pathological Lumbar Spine, Sean Hanrahan

Human Movement Studies & Special Education Theses & Dissertations

The purpose of this study was to examine the short-term effects of Grades 1 and 2 posteroanterior joint mobilizations (JM) at the pathological lumbar spine on subject pain, range of motion (ROM), and muscle force. All subjects were determined to have sustained mechanical dysfunction of the lumbar spine of less than 48 hours as assessed through a standardized evaluation. Subjects were randomly assigned to a group; the control group received ice and stretching while the experimental group received JM in addition to ice and stretching. The JM's were performed at 3 consecutive lumbar segments surrounding the area of greatest discomfort. …

The Effect Of A Six Week Shoulder Strengthening Program On The Muscular Activity Of The Trapezius Posterior Deltoid And Infraspinatus Muscles, Scott B. Allyn

Human Movement Studies & Special Education Theses & Dissertations

The purpose of this study is to determine the effect of a six week shoulder strengthening program on the electromyography (EMG) activity and force production of various shoulder musculature. Thirty (15 male, 15 female) sedentary people volunteered to participate. The subject's non-dominant arm completed four exercises (standing lateral rotation, supine external rotation, tubing fencing, standing DZ flexion) every other day over a six week span. The sets and repetitions were as follows: week 1-2, 3 sets of 10 repetitions; week 3-4, 3 sets of 15 repetitions; week 5-6, 3 sets of 20 repetitions. Subjects were seen a total of three …

Physical Activity And Changes In Abdominal Fat Over 18 Months: A Prospective Study Of Middle-Aged Women, Lance Eric Davidson

Theses and Dissertations

Objective: To investigate the extent to which changes in physical activity predict changes in abdominal fat in women over an 18-month period, while statistically controlling the effects of possible confounders, such as age, total body fat percent, and energy intake. Design: A prospective cohort design over 18 months. There was no intervention or treatment. Changes in objectively-measured physical activity were used to predict changes in abdominal fat over the study period. Subjects: 110 healthy, middle-aged women (mean: 41.3±3.3 yrs), primarily Caucasian, educated, and married. Measurements: An objective measure of physical activity (ACT) using CSA accelerometers, worn continuously for 7 consecutive …