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Energy Expenditure Following Acute Cold Exposure, Steven P. Stelly, Danielle Bravo, Natalie Hines, Loren Koehler, Michael Levi, Donovan L. Fogt

International Journal of Exercise Science: Conference Proceedings

TACSM Abstract -

Energy Expenditure following Acute Cold Exposure

Stelly S, Bravo D, Hines N, Koehler L, Levi M and Fogt D

Exercise Biochemistry & Metabolism Laboratory; Department of Kinesiology, Health & Nutrition; The University of Texas at San Antonio; San Antonio, TX

Category: Masters

Advisor / Mentor: Fogt, Donovan ([email protected])

ABSTRACT

Whole body energy expenditure (i.e., RMR) increases during acute cold exposure. Whether this increase in energy expenditure persists in the post-cold term in humans due to non-shivering thermogenesis has not yet been evaluated. Therefore we tested the hypothesis that RMR would be different directly following acute cold exposure. …

Twenty-One Days Of Lunar Environment Alters Muscle Fiber Areas In Mouse Gastrocnemius, Edwin M. Savio, Kevin L. Shimkus, Jeff M. Hord, John Will Deaver, Michael P. Wiggs, Brandon R. Macias, Florence Lima, Ramon D. Boudreaux, Yasaman Shirazi-Fard, Elizabeth S. Greene, Les A. Braby, Harry A. Hogan, John M. Lawler, Susan A. Bloomfield, James D. Fluckey

International Journal of Exercise Science: Conference Proceedings

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Effects Of Hot And Temperate Environments On Executive Function Tasks During Moderate And High Intensity Exercise, Stephen Decker, Heidi Bachrich, Nikki Kellman, La Tori Flowers, Eric J. Jones, Mark Faries

International Journal of Exercise Science: Conference Proceedings

Cognitive function testing during changes in body core temperature has been widely studied in regards to human performance, often employing passive hyperthermia. More recently, executive function (EF) testing during exercise has been addressed to assess changes in performance with some level of active hyperthermia. The purpose of the present study was to employ both external thermal stress and active hyperthermia in order to assess changes in executive function (EF) tasks within varying environmental temperatures before, during, and after a maximal treadmill test. Nine apparently healthy college-aged males participated in two trials of a Bruce protocol treadmill test in hot (35°C) …

The Impact Of Match-Play Tennis On Indirect Markers Of Oxidative Stress And Antioxidant Status, Wade L. Knez, Mohammed Farooq, Julien Périard

International Journal of Exercise Science: Conference Proceedings

Introduction: Research has shown that both heat stress and endurance exercise can result in an increase in oxidative stress; however, there is limited information regarding the impact of the combination on oxidative balance, in particular an exercise bout characterised by high-intensity long-duration intermittent activity such as tennis. The purpose of this study was to determine the impact of changes in oxidative stress and antioxidant status in response to two simulated tennis matches undertaken in cool (≈22° and 70%RH) and hot (≈36° and 35%RH) environments. Methods: Twelve high level (ITF rank 2-3) male tennis players volunteered to participate in the matches …

Benign Conduction Abnormalities In Response To Acute, Moderately-High, Simulated Altitude Exposure, James B. Geeslin, Nicole E. Priest, Amy M. White, Matthew J. Garver, Libby E. Mccurley, Joe D. Bell, Sheila A. Jones, Dennis J. Kerrigan

International Journal of Exercise Science: Conference Proceedings

Acclimatization to altitude can improve endurance performance above levels achieved solely by training at sea level. There is natural limitation in the applicability of employing terrestrial altitude training – namely proximity. A simple, non-cumbersome method of simulating altitude is desirable to many types of endurance athletes. The Alto2Lab (Pharma Pacific Inc.), consisting of primarily a breathing tube and silo stack, has shown some potential in this role. There is a lack of evidence regarding whether simulated altitude exposure triggers abnormal cardiovascular responses. The aim of this study was to provide initial evidence of cardiac changes associated with usage patterns that …

Cerebrovascular Hemodynamics During Concentric And Eccentric Phases Of Heavy Resistance Exercise, Gilbert Moralez, Steven A. Romero, Caroline A. Rickards, Peter B. Raven, William H. Cooke

International Journal of Exercise Science: Conference Proceedings

Rapid and drastic fluctuations in arterial blood pressures, such as those occurring during heavy resistance exercise pose a unique challenge to the maintenance of cerebral perfusion. During high-intensity leg cycling, regulation of cerebral perfusion is reduced by rapid decreases in beat-to-beat fluctuations in blood pressure (diastolic phase) rather than rapid increases (systolic phase). The purpose of this study was to test the hypothesis that rhythmic heavy resistance exercise will similarly impair the regulation of cerebral blood flow during the diastolic phase of beat-to-beat fluctuations in pressure. We studied seven healthy male subjects. Beat-to-beat finger arterial pressures, and middle cerebral artery …

Gender Differences In Skin And Core Body Temperature During Exercise In A Hot, Humid Environment., Adam S. Venable, Randall R. Williams, Brian K. Mcfarlin

International Journal of Exercise Science: Conference Proceedings

Background. It is universally accepted that men and women regulate heat differently during exercise in hot, humid environments. Despite this common knowledge, little empirical data is available to explain how gender differences effect core/skin temperature changes. Further, the data that is available includes only limited measurement sites and/or time points. Methods. The purpose of this study was to measure the heat regulatory patterns for both men and women during 60-min of exercise in a hot, humid environment. Twenty aerobically fit subjects (10 men; 10 women) completed an acclimation session followed by a 60-min exercise protocol in an environmental chamber set …

Meta-Analysis Of Exercise Associated Hyponatremia In Endurance Athletes, Priyanka Pandya, Frank Wyatt, Benito Velasquez, Lon Kilgore

International Journal of Exercise Science: Conference Proceedings

Purpose: The main purpose of this meta-analytical review was to quantify the patho-physiological changes of exercise-associated hyponatremia. The other purpose was to quantify the preventive measures and treatment of exercise-associated hyponatremia in endurance athletes by reviewing the earlier findings. Methodology: The patho-physiology, preventive measures and treatment of exercise-associated hyponatremia were studied by meta-analysis. Published articles related to exercise-associated hyponatremia in endurance athletes were taken as the data. Data were entered into the coding sheet. Mean and standard deviation were analyzed for the variables and dependent t-test was performed for the fluid consumed and excreted and pre- and post- …

Isokinetic Muscle Strength And Fatigue Evaluation Following A Combined Aerobic And Resistance Training Program On A Gravity Independent Flywheel Device, Joshua A. Cotter, Tomasz Owerkowicz, Alvin M. Yu, Marinelle L. Camilon, Theresa Hoang, Per A. Tesch, Vincent J. Caiozzo, Gregory R. Adams

International Journal of Exercise Science: Conference Proceedings

Exposure to microgravity imposes changes on the musculoskeletal and cardiovascular systems leading to decreases in aerobic capacity, muscular strength, and muscular fatigue (1). Anti-gravity muscles, those that play a postural role in a standard gravity environment such as the soleus and quadriceps, are most affected by microgravity (2) with nearly all musculature affected with extended spaceflight (3). The multi-mode exercise device (M-MED) is a gravity independent device that provides both high force resistance type and low force aerobic type modes of exercise. Consequently, the M-MED has the ability to enhance both skeletal muscle function through resistance training exercises as well …

Effects Of Multiple Bouts Of Long-Duration Hindlimb Unloading And Recovery On Rat Plantaris Muscle, Emily E. Jaroszewski, Kevin L. Shimkus, Yasaman Shirazi-Fard, Harry A. Hogan, James D. Fluckey

International Journal of Exercise Science: Conference Proceedings

Exposure to microgravity results in a rapid reduction of muscle mass. However, few studies exist designed to examine the effects of multiple long-term exposures to microgravity with alternating recovery periods on skeletal muscle. To determine what happens to the recovery of skeletal muscle when faced with subsequent unloading and recovery periods. Male Sprague-Dawley (6 mo) were assigned to the following groups as shown in figure 1 below: 28d hindlimb unloading (1HU), 28d HU session followed by a 56d recovery bout of normal cage ambulation at 1g (1HU+REC), 2 cycles of 28d HU with a 56d recovery period between unloadings (2HU), …

College Students’ Percieved Barriers And Failitators To Maintaining A Healthy Bodyweight, Timothy K. Jones, Arely Perez, Summmer R. Wilmoth, Bonnie Dillon, Lesli Biediger- Friedman, Meizi He

International Journal of Exercise Science: Conference Proceedings

PURPOSE:

It has been evident that on average college students experienced excess weight gain as they transited from high school. The objectives of this study were to qualitatively explore college students’ perceived barriers and facilitators to maintaining a healthy bodyweight and identify the key modifiable factors underlying unhealthy behaviors.

METHOD:

The study employed photovoice (PV), a qualitative research method, in undergraduate students in South Texas. Participants took pictures and wrote descriptions of three perceived barriers and three facilitators to maintaining a healthy body weight; they were then asked to choose one of each for discussion. Eight focus groups were conducted …

Heat Stress And Injury Prevention Practices During Summer High School Football Training In South Texas, Christopher M. Hearon‡, Alberto Ruiz‡, Zachary J. Taylor†

International Journal of Exercise Science

Int J Exerc Sci 3(2) : 55-63, 2010. The purpose was to describe practice conditions influencing the risk of heat stress to athletes in summer football training in South Texas high schools, and to compare these conditions to ACSM recommendations for heat stress/injury risk reduction in this population. Thirty (N=30) high school summer football practices were observed. Wet bulb globe temperature (WBGT) was measured before/after practices and practices were observed for: duration/ structure; athlete clothing; and rest break frequency/duration/content. Practices averaged 125+31 min and WBGT (pre- to post-practice) was 29.7+2.1°C to 31.2+2.2°C for morning, and 31.2+1.6°C to 28.9+1.2°C for evening …

Effects Of Bolus Vs. Metered Rehydration Rates On Fluid Retention And Hydration Efficiency Using 150% Fluid Replacement., Jared R. Graham, Tiffany Newcomb, Nathan Frischman, Eric Jones Ph D

International Journal of Exercise Science: Conference Proceedings

Effects of Bolus vs. Metered Rehydration Rates on Fluid Retention and Hydration Efficiency using 150% Fluid Replacement. Authors: Jared Graham (Masters), Tiffany Newcomb (Masters), Nathan Frischman (Undergraduate), Eric Jones (Ph D) Department of Kinesiology and Health Science Stephen F. Austin State University Nacogdoches TX. 75962 Purpose: This study assessed differences in urine production using bolus vs. metered ingestion fluid consumption during post-exercise rehydration. Methods: Using light to moderate activity in an environmentally controlled chamber (35°C), 9 male subjects were dehydrated by ~ 2% body weight. Following dehydration, counterbalanced rehydration trials (water) were performed in which two different methods of rehydrating; …