Kinesiology Commons^™

The Impact Of Acute Exercise On Factor Viii In Young E-Cigarette Smokers, Andrew R. Allen

Masters Theses, 2020-current

Abstract

Background: There is a strong association between factor VIII (FVIII) and presence of cardiovascular disease (CVD). Exercise is a known trigger for myocardial infarction, and the majority of ischemic events from physical stress occur due to an occlusive thrombus. FVIII increases acutely with exercise and remains elevated hours after exercise. Furthermore, FVIII is also higher in cigarette smokers, however, it has not been investigated in e-cigarette smokers. The purpose of this study is to identify potential differences in FVIII before exercise, after exercise, and its magnitude of change in e-cigarette users versus non-users.

Methods: Eighteen individuals (8 …

The Effect Of Varying Fatty Acid Composition In A High-Fat Meal And Its Impact On Postprandial Airway Inflammation, Breanna L. Davidson

Masters Theses, 2020-current

The Western Diet is typically high in saturated fats (SF) or omega-6 polyunsaturated fatty acids (O6FA) with insufficient amounts of omega-3 polyunsaturated fatty acids (O3FA). When chronic, this diet has been associated with an increased risk of respiratory diseases. PURPOSE: To examine the effect of varying the fatty acid composition of an acute High-Fat Meal (HFM) on postprandial airway inflammation. METHODS: Fifteen individuals [6 M, 9 F; body mass index (BMI) = 25.3 ± 6.6 kg/m²] consumed three HFM smoothies separated by at least 48 hours. The three smoothies were high in SF, O6FA, and O3FA …

Effects Of A 12-Week Vigorous Interval Training Intervention On Pro-Inflammatory Markers In Post-Operative Bariatric And Obese Participants, Brittany Rood

Masters Theses, 2010-2019

Increase prevalence of cardiovascular and other chronic diseases linked to inflammation has led to research on pro-inflammatory cytokines, like tumor necrosis factor - alpha (TNF-α) and lipoprotein-associated phospholipase A₂ (Lp-PLA₂), in attempt to define the relationship between chronic disease, inflammation, and obesity. PURPOSE: Examine the effect of twelve weeks of vigorous intensity interval training on pro-inflammatory markers in post-operative bariatric and obese participants. METHODS: 9 post-operative bariatric individuals [1 man, 8 women; Body mass index (BMI) = 34.23 ± 2.54 kg/m²], 12 obese individuals [5 men, 7 women; BMI=35.77 ± 1.67 kg/m^{2 …}

The Effect Of An Acute Bout Of Exercise On Postprandial Metabolic Responses In Younger And Older Adults, Hannah Frick

Masters Theses, 2010-2019

Over 370,000 Americans, primarily between the ages of 60 and 79, die annually as a result of cardiovascular disease caused by physical inactivity and a diet that is calorically dense and high in fat. Current findings in young and middle-aged adults suggest that acute exercise with energy expenditure in excess of 500 kcals, may attenuate the deleterious health effects caused by consuming the typical American meal. Purpose:The purpose of this study was to examine the effects of acute exercise and aging on postprandial lipemia (PPL) and postprandial glycemia (PPG). We hypothesized that aerobic exercise performed prior to the consumption …

The Effects Of Caffeine Ingestion On The Hemostatic Response To Simulated Firefighting Activities, Sierra Wassell

Showcase of Graduate Student Scholarship and Creative Activities

The leading cause of death among firefighters is sudden cardiac event, and it is acknowledged that most ischemic events are due to an occlusive thrombus formation. In addition, due to the demanding job requirements and shift work, firefighters are commonly known to overuse caffeine as an ergogenic aid. The purposes of this study were to examine the potential effects of caffeine on the hemostatic response to simulated firefighting activity.

The Effect Of Oral Contraceptives On Caffeine Metabolism And Cycling Performance, Annette M. Lemanski

Showcase of Graduate Student Scholarship and Creative Activities

This project objectives were to determine the effects of oral contraceptives and menstrual cycle on the benefits of caffeine supplementation for cycling performance. Seventeen recreationally trained female cyclists completed four trials consisting of 3 kilometer time trials. Subjects ingested either caffeine or a placebo one hour prior to each trial. The magnitude of the ergogenic aid of caffeine was compared between oral contraceptive users and eumenorreheic females. In addition, the effect of caffeine was compared across different phases of the menstrual cycle, specifically the follicular and luteal phases.

Reliability Of Impedance Cardiography In The Measurement Of Cardiovascular Hemodynamics During Exercise., Daniel S. Valcicak

Showcase of Graduate Student Scholarship and Creative Activities

1. Overview of the Project

The project being presented investigated the reliability of a hemodynamic device. Subjects were asked to perform two running tests and two treadmill tests while wearing a device known as the PhysioFlow. The device is based off Ohm’s Law and runs a high frequency, low magnitude electric current through the individual’s thoracic region. The current is absorbed as the heart beats to determine the amount of blood the individual’s heart ejects per beat.

The present study investigated the hemodynamic differences across running and cycle exercise. To determine this, the subject ran/walked at two given intensities, during which …

Performance Impairment Following Sleep Restriction - Is Caffeine The Antidote?, Erin E. Horil

Showcase of Graduate Student Scholarship and Creative Activities

The purpose of this project was to test the hypothesis that caffeine supplementation can lessen the negative effects that sleep restriction (i.e. shortened sleep duration) has on next day performance. Recent work done in our lab showed that sleep restriction has a negative effect on 3-km cycling time trial performance. Thus, it is important to investigate potential ways to lessen the negative effects sleep restriction may have on performance, since it is commonly seen in athletes. In this study, participants completed a battery of performance testing and then a heavy exercise session. This was followed by either a full night …

Influence Of Post-Exercise Nutrient Intake On Recovery And Subsequent Exercise Performance In Youth Cyclists, Andrew Law

Masters Theses, 2010-2019

Purpose: The purpose of this study was to determine if chocolate milk (CM) consumption after high-intensity cycling exercise affects post-exercise recovery and subsequent exercise performance in youth cyclists, compared to a carbohydrate-only (CHO) and a placebo (PL) beverage. Methods: Eight youth cyclists (15-18 y, VO_2peak = 61.8 ± 7.7 mL·kg^-1·min^-1) performed an exercise/recovery protocol consisting of 2 bouts of exercise, on 3 separate occasions, in a randomly counterbalanced crossover design. The first exercise bout (EX1) consisted of 30 min of constant-load cycling (40-60% W_max), and 60 min of high-intensity intervals (alternating 2 min …

Does Acute Preprandial Exercise Modify Postprandial Inflammation After A High Fat Meal In Young And Older Adults?, William Wisseman

Masters Theses, 2010-2019

A single high-fat meal (HFM) can increase systemic inflammation (postprandial inflammation; PPI) and may be attenuated by recent exercise. However, the effect of preprandial exercise on PPI in older adults (OA) is not clear. Purpose: To determine if preprandial exercise attenuates PPI in YA and OA. Methods: 12 YA (23.3±3.9 years n= 5 M/7 F) and 12 OA (67.7±6 years, n= 8 M/4 F) completed two HFM challenges in a randomized order. During HFM alone, participants abstained from exercise 48 hours prior to the HFM session (except for the exercise session) and adhered to a 12 hour overnight …

Expiratory Flow Limitation In Elite Youth Cyclists, Katherine R. Smith

Masters Theses, 2010-2019

Expiratory flow limitation (EFL) has been reported in pre-pubescent adolescents and elite, adult endurance athletes; however, the occurrence of EFL in elite adolescent endurance athletes has not been determined. Purpose: To determine incidence and severity of EFL in elite youth male cyclists of adolescent age. We hypothesized that elite, endurance trained youth will experience a higher prevalence and severity of EFL and dyspnea compared to an untrained control group. Pulmonary function will be similar pre- to post-exercise with bronchodilation occurring in both groups. Methods: 12 elite endurance- trained (ET) youth male cyclists (16.3 ± 1.0 years; 176.5 ± …

How Successful High School Boys Soccer Coaches Perceive And Develop Cultural Competency: A Grounded Theory Approach, Lauren Jefferson

Masters Theses, 2010-2019

The purpose of this study was to examine how high school athletics coaches conceptualize the knowledge, values, and skills of cultural competence, with specific attention to learning processes and influences. In order to serve the increasingly diverse U.S. student population equitably and to the full holistic potential of extracurricular programming, high school coaches must develop a greater comfort with and capacity for exercising cultural competency. A qualitative approach using a grounded theory was applied. Seven coaches and one athletic director were recruited by purposive sampling. The research suggests a process-oriented, chronological model of how experienced coaches begin to work with …

Impact Of One Night Sleep Restriction On Autonomic Function And Heart Rate Variability In Recreational Cyclists, Amanda J. Becker

Senior Honors Projects, 2010-2019

Introduction: Sleep quality has been shown to influence autonomic function. The autonomic nervous system (ANS) responds to stressors by regulating key functions such as heart rate. Autonomic function can be monitored via heart rate variability (HRV). Athletes are prone to poor sleep quality due to psychological and physical stresses of training and competing. Our objective was to investigate the function of the ANS at rest and during exercise following a night of normal sleep (SLP+) and a night of restricted sleep (SLP-).

Methods: Subjects (n=9) completed a familiarization trial and two identical experimental trials under different sleep conditions: SLP- (3-hour …

Hematological Changes In Response To A Drastic Increase In Training Volume In Recreational Cyclists, Jessie Axsom

James Madison Undergraduate Research Journal (JMURJ)

Changes in blood volume contribute to improvement in oxygen utilization (VO2max) with chronic endurance exercise training. Although hematological changes resulting from long-term endurance training have been well documented, it has not been well established whether an increased volume of endurance training preferentially affects plasma volume or red blood cell volume. To answer this question, I studied seven female and four male recreational cyclists before and after exposure to drastic increases (632%) in training volume. Following the 10-week training period, the mean hematocrit (Hct) of the 11 subjects who completed the study significantly (p0.05) correlated with the change in self-reported weekly …

Validity And Reliability Of The Ymca Submaximal Cycle Test Using An Electrically Braked Ergometer, Justin Kidd

Senior Honors Projects, 2010-2019

Purpose: To test the effect of using an electrically braked ergometer on the validity and reliability of the YMCA submaximal cycle test.

Methods: 22 male and 13 female subjects ages 19 to 31 completed one maximal treadmill test and four submaximal cycle tests to measure and estimate VO_2max, respectively. The maximal tests involved recording heart rate and VO₂ during graded exercise until volitional fatigue; an actual max was verified when two out of the following criteria: respiratory Exchange Ratio > 1.1, VO₂ plateau (< 150 ml/min increase in VO₂ during final stage), and achievement of 90% age-predicted HR max (or completed …

Physiological And Anthropometric Profiles Of Elite Teen-Age Cyclists, David Lenzi

Masters Theses, 2010-2019

Lenzi D. N., N. D. Luden, C. J. Womack, and M. J. Saunders. Physiological and anthropometric profiles of elite teen-age cyclists. Purpose: Previous research has demonstrated that maximal oxygen consumption (VO2max), lactate threshold (LT), aerobic/anaerobic power output, and several anthropometric characteristics are related to elite cycling performance in adults. These values also improve during maturation in children. However, there is little research examining how these values differ between elite teen-age cyclists and their adult counterparts. Previous literature has also reported low bone mineral density (BMD) in adult cyclists when compared to recreationally active controls. This study sought to characterize the …

Circulating Microrna Following High Intensity Interval Cycling With And Without Post-Exercise Nutrient Consumption, Jeremy Via

Masters Theses, 2010-2019

Introduction: MicroRNA (miRNA) are small, non-coding RNA that act post-transcriptionally to regulate gene expression. miRNA levels are modulated by acute aerobic exercise, yet little is known about how miRNA levels may change in response to high-intensity interval exercise. Further, almost nothing is known about the impact of post-exercise nutrition (carbohydrate and/or protein) on miRNA levels. Thus, the purpose of this study is to examine the effects of high-intensity interval cycling and different post-exercise nutrients on ci-miRNA levels. Methods: Nine recreationally active males (age 21.9 ± 2.0yrs; VO_2max 49.6 ± 4.0mL/kg/min) competed three trials, each including identical exercise protocols. Protocol …

Repeatability Of The Heart Rate Variability Threshold During Treadmill Exercise, Shane Chambers

Senior Honors Projects, 2010-2019

Purpose: Heart rate variability threshold (HRVT) is a clinical parameter used to gain insight into autonomic balance. Various studies have validated the use of cycle ergometers in determining HRVT, although the literature lacks evidence that treadmill use is a viable means of determining this threshold. We examined the repeatability of HRVT occurrence using standard deviation of normal R-R intervals (SDNN), root mean square of successive differences of continuous R-R intervals (RMSSD), and standard deviation of instantaneous beat intervals (SD1) in college aged males using treadmill exercise to see if this is a reliable method of threshold determination.

Methods: Ten healthy, …

Validity Of Energy Expenditure For The Garmin Vivofit During A Week Of Physical Activity, Kristen Webb

Senior Honors Projects, 2010-2019

Purpose To determine the accuracy of energy expenditure measured by the Garmin Vivofit during a 7 day period of daily living in comparison to a research grade accelerometer, Actigraph.

Methods Participants wore a research grade accelerometer (Actigraph GT3X+) and a Garmin Vivofit device for 7 straight days, 24 hours a day. Paired t-tests were used to examine mean differences in 7-day mean energy expenditure and step values obtained between the devices, as well as the mean energy expenditure values for each day. Pearson correlation was used to assess the relationship of energy expenditure between the devices. Statistical significance was set …

The Quadriciser’S Effect On Range Of Motion And Upper Body Motor Control In Children With Mixed Quadriplegia Due To Chromosomal Disorders, Jillian P. Serigano

Senior Honors Projects, 2010-2019

PURPOSE: The purpose of this experiment is to determine the effects that the quadriciser has on range of motion and upper body motor control in children with mixed quadriplegia due to chromosomal deletion disorders. METHODS: Two subjects with different chromosomal deletion disorders participated in this study. They completed a 10-week passive exercise intervention using the quadriciser. Range of motion of the elbow and shoulder were taken pre and post quadriciser use for both subjects. For one subject, hip and knee measurements were also taken. Both subjects also completed a timed reach task pre and post quadriciser use to test motor …

The Effect Of Incline On Caloric Expenditure Measured By A Wrist-Worn Commercial Activity Monitor, Kaitlin M. Bickel

Senior Honors Projects, 2010-2019

Purpose Physical activity monitors have become popular among the general public to monitor steps, floors climbed, active minutes, and energy expenditure (EE). While there is evidence to support that these devices are accurate in counting steps, there is limited and inconclusive research regarding how accurate they are in measuring EE. This study aimed to test the accuracy of a newer commercial physical activity monitor, the Fitbit Charge (FC), in reporting EE compared to a research-grade accelerometer (GT3X), and indirect calorimetry (IC) while walking on a treadmill with and without incline.

Methods 30 subjects (22 female and 8 male) walked on …

Turning The Tables: A Student’S Study Into The Frequency Of Physical Activity Among University Faculty And Staff, Julianna M. Detrane

Senior Honors Projects, 2010-2019

The purpose of this study was to examine the relationship between physical activity and gender, position, social support, and motivation. The researcher conducted an observational, cross-sectional study of James Madison University faculty and staff (n=423) through the use of SurveyPlanet. The survey was adapted from the 2002 International Physical Activity Questionnaire (IPAQ), and participants responded to items regarding their current moderate and vigorous physical activity level based on the previous seven days, as well as items assessing level of motivation and sources of social support. Results of a multiple regression analysis, F(4, 412) = 6.811, p < .001, adj. R² = …

The Effects Of Coffee Ingestion On The Acute Testosterone Response To Exercise, Taylor Landry

Masters Theses, 2010-2019

Abstract

This study investigated the effects of coffee ingestion (COF) on serum testosterone responses to exercise in recreationally weight-trained males. Subjects ingested either 12 ounces of 6mg/kg caffeinated coffee (COF), decaffeinated coffee (DEC), or water (PLA) one hour prior to exercise in a randomized, within-subject, crossover design. The exercise session consisted of 21 minutes of high intensity interval cycling (alternating intensities corresponding to two minutes at power outputs associated with 2.0 mmol/L lactate and 4.0 mmol/L lactate) followed by resistance exercise (7 exercises, 3 sets of 10 repetitions, 65% 1RM, 1-minute rest periods). Subjects also completed repetitions to fatigue tests …

The Effect Of Menstrual Phase And Oral Contraceptive Steroids On Caffeine During Cycling Performance, Annette M. Lemanski

Masters Theses, 2010-2019

PURPOSE: There is evidence that female sex hormones impact caffeine metabolism, with decreased CYP1A2 activity and diminished caffeine clearance in women with higher estrogen levels. Therefore, the objectives of this project were to determine the effects of oral contraceptives and menstrual cycle on the benefits of caffeine supplementation for cycling performance. METHODS: Sixteen recreationally trained female cyclists, oral contraceptive steroid (OCS) users (n=8, age = 21.4 ± 1.4 years, height = 168.4 ± 3.6 cm, weight = 63.6 ± 7.2kg, VO_2max = 48.0 ± 4.0 ml/kg/min), and non-users (n=8, age = 20.9 ± 2.1 years, height = 161.0 ± …

The Impact Of Freedson Bout Vs. Non-Freedson Bout Physical Activity On Metabolic Syndrome Risk In College Students, Valerie Olijar

Masters Theses, 2010-2019

Purpose The aim of this study is to examine moderate to vigorous physical activity in Freedson bouts compared to non-Freedson bouts and their association with Metabolic Syndrome risk factors in college students.

Methods 72 subjects aged 18-26 were recruited from James Madison University. Subjects height, weight, waist circumference, blood pressure, and body composition were assessed on visit 1. Blood pressure, fasted blood glucose, and lipid profile were assessed on visit 2. Subjects wore an Actigraph GT3X+ accelerometer, which measured physical activity and sleep for 7 days and nights. Univariate Pearson correlation analyses were performed to determine the relationship physical activity …

Impact Of Pre-Exercise Feedings With A Low Or High Glycemic Index On The Ergogenic Effects Of Carbohydrate Mouth-Rinsing During Cycling, Nikolai J. Hladick

Masters Theses, 2010-2019

Purpose: Carbohydrate (CHO) ingestion during exercise enhances performance in short endurance events (~ 1 hr) due to neural influences, as demonstrated by the efficacy of CHO mouth-rinsing during cycling. However, the magnitude of these neural effects may be blunted following pre-exercise CHO feedings. This study examined whether the glycemic index (GI) of a pre-exercise meal affected time-trial (TT) performance in cyclists using a CHO mouth-rinse during exercise. Methods: Eight cyclists (age: 24 ± 6 yr; VO_2max: 61 ± 8 ml×kg^-1×min^-1) completed 4 exercise trials, consisting of 15 min of constant-load cycling followed by a …

The Hemostatic Effects Of Acute Exposure To Colored Cornstarch Powder During A 5k Run, Robert C. Allsbrook

Senior Honors Projects, 2010-2019

PURPOSE: To examine the acute hemostatic effects of particulate matter (PM) in the form of colored corn starch powder during a 5 kilometer race. METHODS: 10 recreationally active adults completed two 5k runs, one with color and one without color. 10 mL blood samples were taken 6 hours prior to the trial and immediately following the trial. PAI-1 activity, FVIII antigen, and tPA activity were measured using an ELISA. RESULTS: No significant main effects or interaction effects (P<0.05) were observed among any of the variables although a trend (P = 0.082) was observed for increased PAI-1 activity during exercise in the color condition. CONCLUSIONS: There is a trend towards increased PAI-1 activity levels during exercise during color runs that could be due to increased inflammation. Furthermore, the lack of increased FVIII:ag and tPA activity suggests that the intensity of the exercise may not have been adequate and further research should be conducted in this area.

Hematological Changes In Response To A Drastic Increase In Training Volume In Recreational Cyclists, Jessie E. Axsom

Senior Honors Projects, 2010-2019

Changes in blood volume contribute to improvement in VO2max with chronic endurance exercise training. Although hematological changes to chronic endurance training have been well documented, it has not been well established whether an increased volume of training in trained individuals preferentially affects plasma volume vs. red cell volume. To answer this question, we studied 8 female and 3 male recreational cyclists before and after exposure to drastic increases in training volume. Following the 10-week training period, mean Hct of the 10 subjects who completed the study significantly (p<0.05) increased from 42.9% to 48.45%. Mean Hb also increased significantly (p<0.05) from 14.6g/dL to 16.4 g/dL. The changes in Hct and Hb were not significantly (p>0.05) correlated with the change in self-reported weekly mileage (R = 0.13 …

Macronutrient Supplementation For Endurance Athletes, Jonathan B. Hurst

Senior Honors Projects, 2010-2019

Purpose: The present study addressed two questions related to macronutrient supplementation during endurance exercise. Firstly, the effects of carbohydrate and protein co-ingestion on time trial (TT) performance were compared to carbohydrate alone. Secondly, the effects of isolated protein ingestion on TT performance were compared to a placebo.

Methods: Six trained cyclists (Age: 22 ± 1 years; Height: 167 ± 12 cm; Weight: 60 ± 10 kg; VO_2max: 62 ± 7 ml/kg/min) completed four experimental trials, consisting of constant-load cycling for two hours (55% W_max) immediately followed by a 30-km simulated time trial. During the trials, subjects …

A 16-Week Run Sprint Interval Training Does Not Have An Effect On Cardiovascular Risk Measured By Framingham Risk Score On Prediabetic Women, Joan A. Mandelson

Masters Theses, 2010-2019

The Framingham risk score (FRS) was developed to determine the likelihood of developing cardiovascular disease (CVD) in the next 10 years using an individual’s age, gender, total cholesterol (TC), high density lipoprotein cholesterol (HDL-C), smoking habits, and systolic blood pressure (SBP). Run-sprint interval training (R-SIT) has shown improvements in various health and blood markers while reducing total exercise time. To date there has not been a study that examines the effects of R-SIT and moderate intensity training (MIT) on framingham risk. The purpose of this study was to determine if a reduction of the 10-year risk of CVD (determined by …