Exercise Physiology Commons^™

The Impact Of Physiologic Reductions In Blood Pressure Upon Oxygen Uptake During Moderate Intensity Leg Cycling, Cory L. Butts, Paul Mcdonough, David Keller, Mitchel Samels, Davor Krnjajic

International Journal of Exercise Science: Conference Proceedings

INTRODUCTION: Control of oxygen uptake (VO2) during the rest-to-exercise transition is thought to be dominated by intracellular processes rather than oxygen delivery. However, large changes in arterial pressure (i.e., supraphysiologic) have been shown to alter VO₂ and its kinetics. Importantly, no studies have investigated the consequence of physiologic alterations in blood pressure on VO₂ and its kinetics during exercise in humans. PURPOSE: The aim of this preliminary study was to assess the effect of modest reductions in MAP achieved via neck suction upon Vo₂ across the rest-exercise transition, to test the hypothesis that physiologic reductions in arterial …

Effect Of The Negative Ion Band On Athletic Performance, Daniel Perales, John D. Smith Ph. D., Kevin H. Kendrick Ph. D.

International Journal of Exercise Science: Conference Proceedings

Negative Ion bands have been suggested to increase various areas of athletic performance. At this time, the authors are not aware of any studies on these bands. Purpose: To determine if a True Power Energy Band (True Power LLC, Melrose, MA) had an effect on various measures of performance. Methods: Forty-one subjects (age = 29.3±7.1 yrs, ht = 171.5±9.7 cm, wt = 85.4±23.2 kg) had their height and weight measured and were then randomized to wear the True Power band (TB) or a silver bracelet placebo band (PB) (Hobby Lobby). After 5 days, subjects were assessed on reaction …

Time-Trend Comparison Of Nfl Combine Peformance From 2000-2009, Christopher A. Seponski, Casey Bollier, A. Eugene Coleman, William E. Amonette

International Journal of Exercise Science: Conference Proceedings

The National Football League (NFL) combine is a final opportunity for collegiate seniors to showcase physical talent to NFL personnel responsible for draft decisions. Potential draftees complete tests of speed, agility, and power; the results of these tests are distributed to all NFL teams. Due to the importance of combine performance to draft order and corresponding financial incentives, training facilities now specialize in teaching technical strategies to improve combine scoring performance. Many athletes now participate in combine preparation programs which may have resulted in increased performance of recent cohorts. Purpose: To determine if NFL combine performances in the 40-yard sprint, …

Vitamin D Status In Lean And Obese Mexican American Children, Nadia H. Agha, Whitney L. Breslin, Brian K. Mcfarlin

International Journal of Exercise Science: Conference Proceedings

Vitamin D deficiency is a worldwide problem amongst adolescents and adults, particularly in minority populations due to high skin melanin content. Melanin blocks the absorption of UVB photons, which limits natural vitamin D accumulation, requiring more dietary intake of vitamin D. Vitamin D deficiency is associated with an increased risk for chronic diseases like cardiovascular disease and diabetes mellitus. Low levels of vitamin D are inversely correlated with systemic inflammation possibly mediating the relationship between vitamin D deficiency and disease. Adequate levels of vitamin D may decrease the risks of chronic diseases, including cardiovascular disease, diabetes mellitus, common cancers, and …

Evaluation Of A Vivo-Morpholino Delivery Method To The Brain And The Affect On Physical Activity, David P. Ferguson, Emily E. Schmitt, Dr.Timothy Lightfoot

International Journal of Exercise Science: Conference Proceedings

Evaluation of a Vivo-Morpholino Delivery Method to the Brain and the Affect on Physical Activity

*David P. Ferguson MS, Emily E. Schmitt MS, J. Timothy Lightfoot PhD FACSM

Biology of Physical Activity Lab, Texas A&M University, College Station, TX, 77843

*To be judged in the doctoral category

Physical inactivity has been shown to be correlated to various disease and conditions. Therefore, there is interest in the genetic mechanisms that control daily physical activity. Vivo-morpholinos are a new molecular biology tool that allows for the transient silencing of specific genes in an animal model, thereby allowing for a systematic method to …

Exercise Blood Pressures Are Lower After Aquatic Compared To Land Treadmill Training, Alex T. Carradine, Brad S. Lambert, Nicolas P. Greene, Travis W. Constanzo, Steven E. Martin, Stephen F. Crouse

International Journal of Exercise Science: Conference Proceedings

Exercise blood pressures are lower after aquatic compared to land treadmill training

Alex T. Carradine¹, Brad S. Lambert¹, Nicolas P. Greene², Travis W. Constanzo¹, Steven E. Martin¹, Stephen F. Crouse (FACSM)¹. Texas A&M University, College Station, TX. ²University of Virginia, Charlottesville, VA.

Traditional treadmill training has been shown to moderately decrease exercise blood pressures but the degree to which aquatic running alters exercise blood pressures has not been fully investigated. PURPOSE: To compare the exercise blood pressure responses after land treadmill (LTM) training to an equivalent …

The Correlation Of Physical Activity And Body Composition In Inbred Mice, Analisa M. Jimenez, David P. Ferguson, Dr.Timothy Lightfoot

International Journal of Exercise Science: Conference Proceedings

The Correlation of Physical Activity and Body Composition in Inbred Mice.

Analisa .M Jimenez*; David .P Ferguson MS RCEP; J. Timothy Lightfoot, PhD FACSM RCEPCES

I would like to participate in the undergraduate category.

Biology of Physical Activity Lab, Texas A&M University, College Station TX, 77843-4243

Obesity is a growing epidemic related to physical inactivity, cardiovascular disease, and Type II diabetes. In smaller mouse cohorts, there has been no association reported between physical activity and body composition indices. The purpose of this experiment was to determine if there was a correlation between the physical activity level and body composition in …

Comparing Energy Cost And Maneuverability For Pushers Of Two Pediatric Wheelchairs Designed For Low-Income Countries, Alex Ott, Karen Rispin

International Journal of Exercise Science: Conference Proceedings

Summary: Our study compared two pediatric wheelchairs designed for less resourced settings, a wheelchair made by the Association of the Physically Disabled of Kenya and the Regency chair made in the US and distributed globally. The Regency chair outperformed the APDK chair in most aspects measured. Introduction: Many wheelchairs are donated to less-resourced countries by well-meaning organizations without regard to local, cultural, and physical conditions and without ensuring appropriate knowledge, tools, and support are present¹. In the last ten years, several organizations have been manufacturing and distributing wheelchairs designed for low-income countries, however few outcomes studies have been …

High And Low Active Inbred Mice Do Not Show Differential Expression In Potential Candidate Genes Associated With Voluntary Physical Activity, Michelle J. Dawes, David P. Ferguson, Greeshma S. Prabhu, Dr.Timothy Lightfoot

International Journal of Exercise Science: Conference Proceedings

Physical inactivity is associated with increased cardiovascular disease, obesity, type II diabetes and some types of cancers. Studies have shown that genetics play a significant role in the regulation of voluntary physical activity. However, these studies involve ad libitum access to wheel running, which may cause confounded results due to a training effect, especially in inherently high active animals. This study investigated the levels of gene expression of four potential candidate genes that have been noted to be expressed differentially between high and low active animals: Myostatin (Mstn), Calsequestrin 1 (Casq1), Glucose Transporter member 4 ( …

Effects Of Obesity And Physical Fitness On Academic Performance In Hispanic High School Students, Areli Garcia, Kyung-Shin Park

International Journal of Exercise Science: Conference Proceedings

Adolescents experience many changes in body structure and psyco-social functioning. Perceived obesity status and lower physical fitness are negatively associated with academic performance and the impact of these variables in academic performance may be different in males and females. PURPOSE: The purpose of this study was to investigate whether levels of obesity and physical fitness have an influence on academic performance in Hispanic male and female adolescents. METHODS: Body mass index (BMI), one-mile run and curl-up scores from 1,401 Hispanic adolescents in grades 9-11 were collected (746 males, 655 females). Students were classified into three groups for BMI score using …

Effects Of Telephone Intervention On Maintaining Fat Loss And Physical Fitness Following Summer Intervention Program, Carlos Garcia, Kyung-Shin Park

International Journal of Exercise Science: Conference Proceedings

It is known that children gain most of extra weight and lose physical fitness during summer months due to physical inactivity and an increase in food intake. Summer intervention may reduce the prevalence of obesity in children; however reduction in body fat may be regained after finishing summer intervention. PURPOSE: The purpose of this study was to determine the effects of 8 week summer lifestyle intervention and 10 month follow-up telephone intervention on changes in body composition and level of physical fitness in Hispanic Children. METHODS: 21 overweight or obese students (over 85 percentile in BMI score) aged 9-16 yrs …

Effects Of Negative Ion Energy Bands On Peak Anaerobic Capacity & Recovery, Kai Holtz, Kevin H. Kendrick Ph. D., John D. Smtih Ph. D.

International Journal of Exercise Science: Conference Proceedings

Effects of Negative Ion Energy Bands on Peak Anaerobic Capacity & Recovery

Kai Holtz, Kevin H. Kendrick, Ph. D., and John D. Smith, Ph. D.

Texas A&M University - San Antonio

Undergraduate

PURPOSE: To study the effects of a commercially available negative ion “energy band” on peak anaerobic capacity and recovery.

METHODS: Twenty one participants (age = 28.2 + 5.2 yrs, ht = 172.1 + 1.0 cm, wt = 83.3 + 17.5 kg) completed two, 30-sec Wingate trials on a Monark 817E cycle ergometer while wearing either a True Power™ Energy Band (TB) (True Power LLC) or silver …

Association Between Anthropometrics, Vertical Jump And Broad Jump To Pure And Transitional Acceleration In Junior College Baseball Players, Casey J. Bollier, Bryan Alexander, A. Eugene Coleman, A. Hatton, Chris Seponski, William E. Amonette

International Journal of Exercise Science: Conference Proceedings

Sprint acceleration is a key physical attribute in baseball players that can be characterized by two phases: pure (PURE) and transitional (TRANS) acceleration. In a linear sprint, PURE occurs from the initiation of movement to approximately 15-meters; TRANS acceleration occurs from approximately 15-meters until an athlete reaches top velocity. Since baseball fields are clearly marked at 13.7m (foul-line) and 27.4m (1^st base), acceleration can be determined in a sports-specific environment and these data may be helpful in characterizing player success. Purpose The purpose of this study was to determine the relationship between anthropometrics, vertical, and broad jump ability to …

Exercising Metabolic, Ventilatory, And Cardiovascular Responses To Isometric Whole Body Vibration Exercise, Jorge A. Reveron, Cindy Goodson, Terry L. Dupler, Leah C. Stroud, William E. Amonette

International Journal of Exercise Science: Conference Proceedings

Purpose: To determine if metabolic, ventilatory, or cardiovascular response to isometric squats with or without external load was enhanced by the addition of a whole body vibration (WBV). Methods: Fifteen subjects (28.4±6.5y; 173.7±8.6 cm; 75.5±20.8 kg) underwent four exercise sessions with three days’ rest between sessions. The sample included 7 males and 8 females. Subject performed 10-sets of one-minute isometrics squats with 45 degrees of knee flexion standing on a WBV platform under four conditions: Unloaded, Unloaded Vibration, Loaded, and Loaded Vibration. Each condition was performed on a separate day; the session order was presented at random. One-minute …

A Comparative Study Of Two Pediatric Wheelchairs Based On Therapists' Feedback, Kristen Huff, Vanessa Parra, Karen Rispin

International Journal of Exercise Science: Conference Proceedings

Summary

Receiving feedback from therapists and seating specialists is an important part of evaluating and providing quantitative data to wheelchair manufacturers servicing less-resourced settings.

Introduction

There is currently a pressing need for research to enable proper donations of wheelchairs to less resourced settings¹. To appropriately serve a population of persons with disabilities in a given location, it is important to understand the specific needs of that population². People living in less resourced settings have a different lifestyle than those residing in more developed countries, and different functionality and design of wheelchairs is needed³. The …

Using A Lego© Nxt Robotic Vehicle As A Constant Speed Device In Replacement Of A Wheelchair Treadmill For Use In Determining Physical Cost Index Of Pushing A Wheelchair, Joshua Vanleer, Karen Rispin, Darien Harris, Micahel Dueck, Matthew Green

International Journal of Exercise Science: Conference Proceedings

Summary

A Lego© robot is being tested as a constant speed device to enable more sensitive data collection on the energy cost of pushing two different wheelchairs designed for low income countries.

Introduction

For many years, treadmills of all kinds including wheel chair treadmills have been utilized to enable energy cost studies to be done at a constant speed because there is a non-linear relationship between the speed of travel and the energy cost of moving. However, these treadmills are expensive, bulky, and simply not available in low-income countries where we have been collecting data on the function of pediatric …

Aging Impairs Ach-Induced Dilation In Skeletal Muscle Feed Arteries: Role Of Akt-Dependent Phosphorylation Of Enos., Meredith J. Luttrell, John Seawright, Daniel Trott, Christopher R. Woodman

International Journal of Exercise Science: Conference Proceedings

Aging impairs ACh-induced dilation in skeletal muscle feed arteries: role of Akt-dependent phosphorylation of eNOS.

Meredith J. Luttrell¹, John W. Seawright¹, Daniel W. Trott¹ and Christopher R. Woodman^1,2

1. Dept. of Health and Kinesiology Texas A&M University, College Station, TX 77843

2. Dept of Veterinary Physiology and Pharmacology Texas A&M University, College Station, TX 77843

We tested the hypothesis that impaired nitric oxide (NO)-mediated, endothelium-dependent dilation in aged soleus muscle feed arteries (SFA) is due to an age-related decrement in PI3-kinase(PI3K)/protein kinase B (Akt)-dependent phosphorylation of endothelial NO synthase (eNOS) on serine residue 1177 …

A Method Of Altering Coronal Plane Prosthetic Foot Stiffness For Studying Its Effect On Amputee Gait, Courtney E. Shell, Glenn K. Klute, Richard R. Neptune

International Journal of Exercise Science: Conference Proceedings

In an effort to understand the effects of prosthetic foot stiffness on amputee gait and mobility, it is useful to produce prototype prosthetic feet that differ in stiffness. While many commercial prosthetic feet are made out of carbon fiber, the manufacturing process is ill-suited to design experimentation as it is expensive, time consuming and requires tooling modifications to produce design changes. In order to facilitate a study of the effects of coronal plane prosthetic foot stiffness on amputee maneuvering gait, we are manufacturing custom prosthetic feet using a form of additive manufacturing, selective laser sintering (SLS), that was developed at …

Binge Drinking Following Resistance Exercise: Effect On Muscle Power Recovery, Nosa O. Idemudia, Jakob L. Vingren, Harsh H. Buddhadev, Anthony A. Duplanty, Kiannah R. Williams, Joe Chua, David W. Hill

International Journal of Exercise Science: Conference Proceedings

Alcohol impairs recovery of isokinetic performance following muscle damaging resistance exercise but no knowledge exists regarding alcohol’s effect on recovery of performance in explosive isotonic movements following resistance exercise that induces only limited muscle damage. Purpose: To investigate the effect of alcohol on recovery from resistance exercise for explosive performance measures. Methods: Nine healthy men (Mean ± SD: 24.8 ± 3.2 years, 176 ± 7 cm, 86.4 ± 14.6 kg) completed 2 identical acute heavy resistance exercise tests (AHRET) separated by 1 week. The AHRET consisted of 6 sets of 10 repetitions of smith machine squats at 80% of 1-repetition …

Decrease In Knee Flexion Is Observed In A Three Set Tennis Match On Knee Kinematics During The Tennis Serve, Brad Fenter, Scott Marzilli, X. Neil Dong Dr.

International Journal of Exercise Science: Conference Proceedings

Tennis matches can be long, physically challenging affairs. The course of a match is often determined by the serving proficiency of both players. While the serve has been extensively studied, the relationship between the serve and match length specifically regarding knee kinematics is not well documented in a real time environment. The purpose of the current study was to determine the effect a three-set tennis match had on knee kinematics during the serve. Eleven male collegiate tennis players (age: 19.6±1.7) were recruited from The University of Texas at Tyler. All participants played a three-set match and digital video recordings of …