Exercise Science Commons^™

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 …

Cutaneous Blood Flow In Type 2 Diabetic Individuals After An Acute Bout Of Maximal Exercise, Sheri R. Colberg, Henri K. Parson, D. Robb Holton, Tanja Nunnold, Aaron I. Vinik

Human Movement Studies & Special Education Faculty Publications

OBJECTIVE - We previously demonstrated a positive association between chronic aerobic exercise and dorsal foot skin blood flow during local heating in type 2 diabetic individuals. Thus, we hypothesized that a prior acute bout of maximal exercise would also have positive effects on postexercise blood now.

RESEARCH DESIGN AND METHODS - Subjects consisted of 32 individuals with type 2 diabetes and 26 nondiabetic control subjects further subdivided based on their physical activity status diabetic exerciser (DE), diabetic sedentary (DS), control exerciser (CE), or control sedentary. Dorsal foot cutaneous blood flow was measured noninvasively by continuous laser-Doppler assessment at baseline and …

Use Of Heart Rate Reserve And Rating Of Perceived Exertion To Prescribe Exercise Intensity In Diabetic Autonomic Neueropathy, Sheri R. Colberg, David P. Swain, Aaron I. Vinik

Human Movement Studies & Special Education Faculty Publications

Objective- Individuals with diabetic autonomic neuropathy (DAN) exhibit an increased resting heart rate but depressed maximal heart rate. Thus, the purpose of this study was to examine the validity of using either percent of heart rate reserve (HRR) or a rating of perceived exertion (RPE) scale to prescribe exercise intensity in diabetic individuals both with and without DAN.

Research Design and Methods-The subjects consisted of 23 individuals with type 2 diabetes, ages 45-75 years, with (DAN; n=13) or without (No DAN; n=10) clinical signs of DAN, as assessed by heart rate variability using the expiration-to-inspiration ratio of the …

Nitric Oxide Synthase Inhibition Does Not Affect Regulation Of Muscle Sympathetic Nerve Activity During Head-Up Tilt, Jian Cui, Rong Zhang, Thad E. Wilson, Sarah Witkowski, Craig G. Crandall, Benjamin D. Levine

Exercise and Sport Studies: Faculty Publications

To test the hypothesis that systemic inhibition of nitric oxide (NO) synthase does not alter the regulation of sympathetic outflow during head-up tilt in humans, in eight healthy subjects NO synthase was blocked by intravenous infusion of NG-monomethyl-L-arginine (L-NMMA). Blood pressure, heart rate, cardiac output, total peripheral resistance (TPR), and muscle sympathetic nerve activity (MSNA) were recorded in the supine position and during 60° head-up tilt. In the supine position, infusion of L-NMMA increased blood pressure, via increased TPR, and inhibited MSNA. However, the increase in MSNA evoked by head-up tilt during L-NMMA infusion (change in burst rate: 24 ± …