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Full-Text Articles in Life Sciences

Living On The Edge: Thermophysiology Of The Southern Flying Squirrel At Its Northern Range Margin, Vanessa R. Hensley May 2019

Living On The Edge: Thermophysiology Of The Southern Flying Squirrel At Its Northern Range Margin, Vanessa R. Hensley

Electronic Theses and Dissertations

Climate change has the potential to upset entire ecological systems, making predictive models of the utmost importance. The incorporation of physiological parameters into predictive models not only bolsters their accuracy but also provides a mechanistic explanation for ecological changes already observed and those yet to come. North American flying squirrels, for example, have already experienced dramatic range shifts northward over recent decades, with climate change being the suspected driver. While other studies have focused on warming winter temperatures, I explored the hypothesis that rising summer temperatures were driving the observed range shifts. Unable to find a reliable population of the ...


The Effects Of Swimming Training On Arterial Stiffness, Muscular Strength And Cardiorespiratory Endurance In Postmenopausal Women With Stage 2 Hypertension, Steven Scott Mar 2019

The Effects Of Swimming Training On Arterial Stiffness, Muscular Strength And Cardiorespiratory Endurance In Postmenopausal Women With Stage 2 Hypertension, Steven Scott

Student Research and Creative Activity Fair

Objective:

Aging is associated with progressive decreases in arterial health and function as well as overall fitness. It is crucial to prevent or reduce the negative effects of aging on vasculature and fitness components by implementing appropriate lifestyle interventions, such as exercise training. We examined the effects of a swimming (SWM) regimen on arterial stiffness (pulse wave velocity, PWV), blood pressure (BP), wave reflection (AIx), muscle strength and aerobic capacity in postmenopausal women with stage 2 hypertension.

Methods:

Using a parallel experimental design, participants were randomly assigned to either a SWM (n=52) or non-exercising control group (n=48) for ...


Effect Of An 8-Week Plyometric Training Program With Raised Forefoot Platforms On Agility And Vertical Jump Performance, Matthieu Pj Voisin, Mikaël Scohier Feb 2019

Effect Of An 8-Week Plyometric Training Program With Raised Forefoot Platforms On Agility And Vertical Jump Performance, Matthieu Pj Voisin, Mikaël Scohier

International Journal of Exercise Science

Some athletes use solid rubber platforms strapped onto the forefoot during plyometric exercises in order to increase their explosive performance including vertical jump height and agility. The purpose of this study was to compare the effects of a plyometric training program realized with these ‘raised forefoot platforms’, designed to keep the heels off the ground, to the same program conducted with regular shoes. Forty-nine subjects performed 2 sessions of plyometric training for 8 weeks, either with raised forefoot platforms (n=20) or regular shoes (n=29). Countermovement jump (CMJ) height and agility test time were evaluated at pre-, mid- and ...


Monitoring Changes Of Cardio-Respiratory Parameters During 2000m Rowing Performance, Arnab Das, Malay Mandal, Alak K. Syamal, Pralay Majumdar Feb 2019

Monitoring Changes Of Cardio-Respiratory Parameters During 2000m Rowing Performance, Arnab Das, Malay Mandal, Alak K. Syamal, Pralay Majumdar

International Journal of Exercise Science

International Journal of Exercise Science 12(2): 483-490, 2019. The purpose of this study was to characterize the kinetics of cardio-respiratory parameters of elite male rowers during 2000m rowing time trial. 16 lightweight category (LWC) and 11 open category (OC) elite male rowers attending National camp were included in the study. Pulmonary gas exchange and heart rate (HR) during 2000m rowing ergometer test was determined through breath-by-breath analysis, with a portable metabolic gas analyzer and HR monitor. Time to completion, HR, oxygen uptake (V̇O2), minute ventilation (V̇E) and respiratory exchange ratio (RER) were recorded at 500m, 1000m ...


Validity And Wearability Of Consumer-Based Fitness Trackers In Free-Living Children, Keith Brazendale, Lindsay Decker, Ethan T. Hunt, Michelle W. Perry, Allison B. Brazendale, R Glenn Weaver, Michael W. Beets Feb 2019

Validity And Wearability Of Consumer-Based Fitness Trackers In Free-Living Children, Keith Brazendale, Lindsay Decker, Ethan T. Hunt, Michelle W. Perry, Allison B. Brazendale, R Glenn Weaver, Michael W. Beets

International Journal of Exercise Science

International Journal of Exercise Science 12(5): 471-482, 2019. Over the past decade wearable fitness trackers (WFTs) have grown in popularity with more recent versions able to capture the pulse rate noninvasively on the wrist of the wearer. Most of evidence on the validity of WFTs have explored adults in clinical settings. Thus, the purpose of this study is to 1) evaluate the validity of a wrist-placed WFT in determining heart rate, and 2) examine the wear compliance of a wrist-placed WFT, in children in free-living settings. In study 1, 19 children (5-12yrs) wore a Fitbit Charge HR© and a ...


Effects Of Exercise Environment And Protocol Intensity On The Efficacy Of Rehabilitation Care For Patients With Huntington’S Disease: A Comprehensive Review, James D. Dolbow, Hau Ly, Nicholas Elwert, John Gassler Feb 2019

Effects Of Exercise Environment And Protocol Intensity On The Efficacy Of Rehabilitation Care For Patients With Huntington’S Disease: A Comprehensive Review, James D. Dolbow, Hau Ly, Nicholas Elwert, John Gassler

International Journal of Exercise Science

International Journal of Exercise Science 12(3): 456-470, 2019. Huntington’s disease (HD) is a neurodegenerative disease caused by astrogliosis of the putamen and caudate nucleus. Motor symptoms include progressive chorea, leading to deficits in gait, motor function, and quality of life. While many studies have examined the effects of therapeutic exercise on these factors in individuals with HD, the efficacy of such protocols has yet to be analyzed. Purpose: The purpose of this review is to analyze trends in efficacy reported by studies examining the effects of exercise on motor function, gait quality, and quality of life in individuals ...


Body Composition And Perceived Stress Through A Calendar Year In Ncaa I Female Volleyball Players, Hayden W. Hyatt, Andreas N. Kavazis Feb 2019

Body Composition And Perceived Stress Through A Calendar Year In Ncaa I Female Volleyball Players, Hayden W. Hyatt, Andreas N. Kavazis

International Journal of Exercise Science

International Journal of Exercise Science 12(5): 433-443, 2019. The aim of the study was to track changes of perceived stress and body composition across an entire calendar year in National Collegiate Athletic Association (NCAA) division I female volleyball players. We hypothesized that perceived stress and body composition would vary between the competitive season and off-season, with the largest changes occurring during time points prior to the onset and after the end of the competitive season. Eight female volleyball players participated in a longitudinal study. Body mass, body mass index (BMI), percent body fat, fat mass, and fat free mass ...


Acute Effects Of L-Arginine Supplementation On Oxygen Consumption Kinetics And Muscle Oxyhemoglobin And Deoxyhemoglobin During Treadmill Running In Male Adults, Claudia M. Meirelles, Cristiane Matsuura, Roberto Silva Jr., Felipe F. Guimaraes, Paulo Sergio C. Gomes Feb 2019

Acute Effects Of L-Arginine Supplementation On Oxygen Consumption Kinetics And Muscle Oxyhemoglobin And Deoxyhemoglobin During Treadmill Running In Male Adults, Claudia M. Meirelles, Cristiane Matsuura, Roberto Silva Jr., Felipe F. Guimaraes, Paulo Sergio C. Gomes

International Journal of Exercise Science

International Journal of Exercise Science 12(2): 444-455, 2019. L-arginine is used as a nitric oxide related supplement intended to improve sports performance, and to enhance muscular recovery during exercise. However, the literature is inconclusive. The aim of this study was to determine the effects of acute oral L-arginine supplementation on O2 consumption kinetics and local muscle blood volume and oxygenation during treadmill running at two different intensities. Using a double-blind, crossover and placebo-controlled design, 11 young healthy male adults were randomly assigned to 6 g of L-arginine (ARG) or placebo (PLA) supplementation that was ingested 60 min before the ...


A Comparison Of Blood Viscosity And Hematocrit Levels Between Yoga Practitioners And Sedentary Adults, James Shadiow, Takashi Tarumi, Mandeep Dhindsa, Stacy D. Hunter Feb 2019

A Comparison Of Blood Viscosity And Hematocrit Levels Between Yoga Practitioners And Sedentary Adults, James Shadiow, Takashi Tarumi, Mandeep Dhindsa, Stacy D. Hunter

International Journal of Exercise Science

International Journal of Exercise Science 12(2): 425-432, 2019. Elevations in whole blood viscosity (WBV) and hematocrit (Hct), have been linked with increased risk of cardiovascular disease (CVD). Endurance training has been demonstrated to lower WBV and Hct; however, evidence supporting the efficacy of yoga on these measures is sparse. A cross-sectional study was conducted examining WBV and Hct levels between yoga practitioners with a minimum of 3 years of consistent practice and sedentary, healthy adults. Blood samples were collected from a total of 42 participants: 23 sedentary adults and 19 regular yoga practitioners. Brachial arterial blood pressure (BP) was ...


Caffeine Alters Rpe-Based Intensity Production, Tyler Langford, Eric O'Neal, Eric M. Scudamore, Samantha Johnson, Caitlin Stevenson, Veronika Pribyslavska, Matt Green Feb 2019

Caffeine Alters Rpe-Based Intensity Production, Tyler Langford, Eric O'Neal, Eric M. Scudamore, Samantha Johnson, Caitlin Stevenson, Veronika Pribyslavska, Matt Green

International Journal of Exercise Science

International Journal of Exercise Science 12(6): 412-424, 2019. This study examined effects of caffeine (CAF) on power output (PO) selection and associated physiological responses during cycling at moderate and high intensities prescribed by RPE (0-10 scale). Participants (n = 9) (VO2peak: 55.4 ± 6.32 mL · kg-1 · min-1) cycled for 20 min at RPE4 and 20 min at RPE7 separated by 10 min recovery following caffeine (CAF) (6 mg · kg-1) and placebo (PLA) ingestion. PO, HR, serum lactate [La], VO2, VE, and RER were recorded every 5 min. Session RPE (S-RPE) was recorded following 10 min recovery. Repeated-measures ANOVA’s ...


Reductions In Kinematics From Brassieres With Varying Breast Support, Taylor M. Gibson, Nilanthy Balendra, Ksenia I. Ustinova, Joseph Langenderfer Feb 2019

Reductions In Kinematics From Brassieres With Varying Breast Support, Taylor M. Gibson, Nilanthy Balendra, Ksenia I. Ustinova, Joseph Langenderfer

International Journal of Exercise Science

International Journal of Exercise Science 12(1): 402-411, 2019. Given the abundance of brassieres, manufacturers, and investigations of bras, it remains unclear whether the continued development of bras will provide many additional improvements in support. This study measured performance of sport bras including 4 popular bras and a new style bra at reducing breast motion during five common exercises. Bras demonstrated varying effectiveness and consistency across exercises at reducing undesirable breast motion, (hereafter referred to as kinematics). The new style bra significantly reduced vertical breast displacement and acceleration more consistently than other bras. When significant differences between bras were detected ...


Validity And Reliability Of The Polar A300'S Fitness Test Feature To Predict Vo2max, Kasie D. Cooper, Alex B. Shafer Feb 2019

Validity And Reliability Of The Polar A300'S Fitness Test Feature To Predict Vo2max, Kasie D. Cooper, Alex B. Shafer

International Journal of Exercise Science

International Journal of Exercise Science 12(4): 393-401, 2019. The Polar A300 fitness watch includes a feature termed the 5-minute fitness test. This feature claims to estimate maximal oxygen consumption (VO2max) in healthy adults. The purpose of this study was to assess the validity and reliability of the Polar A300 “Fitness Test” VO2max estimation feature. Nineteen recreationally active young adult males (n=9) and females (n=10) completed a Bruce protocol treadmill protocol to assess VO2max, followed by two separate 5-minute Polar Fitness Test (VO2max estimation) trials. A Pearson’s r test was used to determine the relationship between VO2max ...


Evaluation Of Earbud And Wristwatch Heart Rate Monitors During Aerobic And Resistance Training, Jennifer A. Bunn, Elizabeth K. Wells, John P. Manor, Michael J. Webster Feb 2019

Evaluation Of Earbud And Wristwatch Heart Rate Monitors During Aerobic And Resistance Training, Jennifer A. Bunn, Elizabeth K. Wells, John P. Manor, Michael J. Webster

International Journal of Exercise Science

International Journal of Exercise Science 12(4): 374-384, 2019. Assessment of biometrics during exercise is evolving to create devices that are “all-inclusive", in an effort to decrease the number of devices required during exercise while providing comprehensive and accurate biometric measures. The purpose of this study was to determine the accuracy of two optical heart rate monitors, the Jabra earbud and the Mio Alpha wristwatch, during aerobic and anaerobic exercise. Twenty-two recreationally active participants (25.4 ± 6.9 years, 171 ± 11 cm, 73.9 ± 3.1 kg, and 25.2 ± 9.2% body fat) completed this study. Participants completed 30 ...


Intermittent Pneumatic Compression Boot Use Elevates Blood Lactate During Subsequent Exercise, Richard T. Marcello, Lucas Fortini, Beau Kjerulf Greer Feb 2019

Intermittent Pneumatic Compression Boot Use Elevates Blood Lactate During Subsequent Exercise, Richard T. Marcello, Lucas Fortini, Beau Kjerulf Greer

International Journal of Exercise Science

International Journal of Exercise Science 12(2): 385-392, 2019. The purpose of the present study was to investigate the influence of intermittent pneumatic compression (IPC) boot use between submaximal cycling trials on heart rate (HR) and blood lactate concentrations. Ten healthy participants (9M; 1F) performed two consecutive 60 minute rides at 60% of functional threshold power with a 30 minute rest between rides. The rest period was spent in a supine position using IPC boots (BOOT) or sitting in a similar position without boots (CON). HRs were collected every 15 minutes during cycling rides, and lactate was measured at the ...


Aerobic Fitness Markers Associated With Post-Paddling Breath Hold Capacity In Competitive Surfers, Cory J. Greever, Kaden K.L. Groseclose, April L. Denny, Danielle C. Jones Feb 2019

Aerobic Fitness Markers Associated With Post-Paddling Breath Hold Capacity In Competitive Surfers, Cory J. Greever, Kaden K.L. Groseclose, April L. Denny, Danielle C. Jones

International Journal of Exercise Science

International Journal of Exercise Science 12(6): 366-373, 2019. Competitive surfing is a growing sport with evolving performance and safety demands. One particular challenge surfers face is the need to endure long breath-holds following bouts of surf paddling. The purpose of this study was to examine the association between aerobic fitness markers, such as VO2peak and ventilatory thresholds, and post-paddling breath-hold capacity in competitive surfers. Eleven male collegiate level competitive surfers completed both a maximal graded exercise test and a simulated post-paddling breath-hold challenge on a modified paddling ergometer. Associations between markers of aerobic fitness and post-paddling breath-hold capacity ...


The Effects Of Pre-Workout Supplementation On Anaerobic Power And Maintenance Of Power In College Students, Christine T. Herbe, M. Travis Byrd, Taylor K. Dinyer, Brian J. Wallace, Haley C. Bergstrom Feb 2019

The Effects Of Pre-Workout Supplementation On Anaerobic Power And Maintenance Of Power In College Students, Christine T. Herbe, M. Travis Byrd, Taylor K. Dinyer, Brian J. Wallace, Haley C. Bergstrom

International Journal of Exercise Science

International Journal of Exercise Science 12(2): 355-365, 2019. This study examined the effects of Assault™ pre-workout supplementation on peak power output (PP), mean power output (MP), and percent decline in power output (% decline) during repeated, Wingate anaerobic tests. Thirteen healthy, physically active participants (7 male, 6 female) completed the randomized, double-blind, placebo-controlled crossover design with two conditions, supplement and placebo. The participants visited the laboratory for a total of three visits, 2-7 days apart. During visit 1, the participants completed a 4-minute familiarization warm-up on the Monark cycle ergometer and performed one baseline, 30-second Wingate cycle ergometry test. During ...


The Effect Of Foam Rolling Of The Hamstrings On Proprioception At The Knee And Hip Joints, Erin David, Tal Amasay, Kathryn Ludwig, Sue Shapiro Feb 2019

The Effect Of Foam Rolling Of The Hamstrings On Proprioception At The Knee And Hip Joints, Erin David, Tal Amasay, Kathryn Ludwig, Sue Shapiro

International Journal of Exercise Science

International Journal of Exercise Science 12(1): 343-354, 2019. The purpose of this study was to determine the acute effect of hamstring foam rolling on proprioception at the knee and hip joints. Twenty-five participants completed two proprioceptive tests on separate days, in a random order. The joint position matching test used no visual feedback. Participants were verbally guided to a target lunge position, which was maintained for six seconds while right hip and knee angles were recorded. After rest, participants reproduced this position without guidance for six seconds. Three trials were completed at baseline, and zero, 10, and 20 minutes ...


The Effects Of Ocular Dominance On Visual Processing In College Students, William Alexander Holland Feb 2019

The Effects Of Ocular Dominance On Visual Processing In College Students, William Alexander Holland

James Madison Undergraduate Research Journal (JMURJ)

The role of ocular dominance in processing visual memory and analytic tasks is unknown. Research has variably showed both significant effects and no effect of ocular dominance on visual perception, motor control, and sports performance. The goal of this study was to determine if there is a relationship between ocular dominance and visual processing under a variety of computer gaming tasks. This was accomplished by first determining subjects’ ocular dominance through the Miles test, and then examining the subjects’ visual performance on four different Lumosity games under three conditions: left eye, right eye, and both eyes. Results suggest a relationship ...


The Effects Of Beetroot Juice On Vo2max And Blood Pressure During Submaximal Exercise, Jose M. Perez, John Dobson, Amy Jo Riggs, Greg Ryan Jan 2019

The Effects Of Beetroot Juice On Vo2max And Blood Pressure During Submaximal Exercise, Jose M. Perez, John Dobson, Amy Jo Riggs, Greg Ryan

International Journal of Exercise Science

International Journal of Exercise Science 12(2): 332-342, 2019. Beetroot juice (BR) has been shown to reduce blood pressure (BP) at rest and improve several performance parameters during exercise. However, the effect of BR on BP during submaximal exercise has not been investigated and its effects on VO2max are inconclusive. The purpose of this study was to investigate the effects of BR on VO2max and BP during submaximal exercise. 20 healthy, recreationally trained volunteers (age 21.8±2.35 years, weight 75.10±10.62 kg, height 177.4±6.39 cm) participated in this study ...


Development Of The Physical Activity Tracking Preference Questionnaire, Emily Fu, Marney A. White, Jaclyn M. W. Hughto, Bella Steiner, Erik Willis Jan 2019

Development Of The Physical Activity Tracking Preference Questionnaire, Emily Fu, Marney A. White, Jaclyn M. W. Hughto, Bella Steiner, Erik Willis

International Journal of Exercise Science

International Journal of Exercise Science 12(5): 297-309, 2019. The present study aims to develop the Physical Activity Tracking Preference Questionnaire (PATPQ), a measure of unit (distance, steps, calories, minutes) preference for tracking physical activity. The PATPQ was developed in two phases. During Phase One, the initial PATPQ was created (24 items), was assessed by an expert panel for face validity, and tested in 557 adults. Results were used to revise and modify the PATPQ. In Phase Two, the item pool was expanded and tested in 374 adults. Kuder‐Richardson Formula 20 scores for internal consistency and interclass correlations for ...


Concordance Among Bioelectrical Impedance Analysis Measures Of Percent Body Fat In Athletic Young Adults, Benjamin M. Carrion, Ashley Wells, Jerry L. Mayhew, Alexander J. Koch Jan 2019

Concordance Among Bioelectrical Impedance Analysis Measures Of Percent Body Fat In Athletic Young Adults, Benjamin M. Carrion, Ashley Wells, Jerry L. Mayhew, Alexander J. Koch

International Journal of Exercise Science

International Journal of Exercise Science 12(4): 324-331, 2019. The purpose of this investigation was to determine the agreement among three bioelectrical impedance analysis devices (BIA) in athletic young adults. Fifty-one participants (26 men and 25 women) were assessed for percent body fat (PBF) using an arm-to-arm bipolar single-frequency device (ABIA), a leg-to-leg single-frequency device (LBIA), and an octopolar multi-frequency BIA device (MFBIA). PBF was measured with the three devices in a randomized, counterbalanced order. Repeated measures ANOVA revealed significant (p < 0.001) differences in PBF estimates among all devices (ABIA = 19.1 ± 7.2%, LBIA = 21.6 ±7.5%, and MFBIA = 22.9 ± 8.8%). Pearson’s Correlations revealed a strong relationship between ABIA and MFBIA in both men (r = 0.948) and women (r = 0.947) and a moderately-strong relationship between LBIA and MFBIA (r = 0.870 ...


Effect Of Self-Selected Music On Affective Responses And Running Performance: Directions And Implications, Nile Brandt, Selen Razon Jan 2019

Effect Of Self-Selected Music On Affective Responses And Running Performance: Directions And Implications, Nile Brandt, Selen Razon

International Journal of Exercise Science

International Journal of Exercise Science 12(5): 310-323, 2019. The purpose of this study was to evaluate the effect of different types of music (i.e., self-selected, researcher-selected, and no music) on affective responses to an exercise task and the subsequent running performance, with an untrained population of college students in a field setting. Twenty-seven college students (17 female, 10 male, Mage = 22.11, SD = 5.12), ran one mile on three separate occasions and either listened to self-selected music, music selected by the researcher (i.e., Audiofuel), or no music at all. Affective responses were assessed before, during ...


Critical Power Concept: Males Vs. Females And The Impact Of Muscle Fiber Composition, Michael A. Kantor, Jessica Albers, Katelyn Weed, Zachary Erickson Jan 2019

Critical Power Concept: Males Vs. Females And The Impact Of Muscle Fiber Composition, Michael A. Kantor, Jessica Albers, Katelyn Weed, Zachary Erickson

International Journal of Exercise Science

International Journal of Exercise Science 12(4): 277-286, 2019. CP describes the highest metabolic rate resulting in complete oxidative energy provision (steady state). Between the heavy and severe domain of exercise, CP will be surpassed, and the finite work capacity known as W' will be used up. The purpose of the study is to test CP and W’ and its relationship in males and females, while assessing type I and II muscle fiber distribution in the leg. A 3 MT and isokinetic leg dynamometer muscle fiber typing protocol of 25 consecutive leg extensions were completed. W' for the sample (n ...


Antioxidant Supplementation Impairs Changes In Body Composition Induced By Strength Training In Young Women, Maurilio T. Dutra, Savio Alex, Alyson F. Silva, Lee E. Brown, Martim Bottaro Jan 2019

Antioxidant Supplementation Impairs Changes In Body Composition Induced By Strength Training In Young Women, Maurilio T. Dutra, Savio Alex, Alyson F. Silva, Lee E. Brown, Martim Bottaro

International Journal of Exercise Science

International Journal of Exercise Science 12(2): 287-296, 2019. Strength training (ST) is known to promote muscle hypertrophy and body composition adaptations. However, only a few studies investigated the effects of ST combined with antioxidant supplementation (AS) on these adaptations. The aim of this study was to investigate chronic effects of ST combined with AS on fat mass (FM) and fat-free mass (FFM) of young women. In a double-blinded design, thirty-three subjects (22.9 ± 2.5 years, 57.7 ± 8.4 kg, 1.6 ± 0.6 m) were allocated into three groups: 1) vitamins (n=12), 2) placebo (n=11 ...


The Effects Of Self-Presentation To Engage In Physical Activity, Duygu Gurleyik, Alison Ede, Deborah Feltz Jan 2019

The Effects Of Self-Presentation To Engage In Physical Activity, Duygu Gurleyik, Alison Ede, Deborah Feltz

International Journal of Exercise Science

International Journal of Exercise Science 12(5): 263-276, 2019. In order to improve physical activity levels, it has previously been suggested that the use of rewards can potentially have an impact on exercise behavior. One type of reward, the opportunity to present a good impression in the eyes of others (e.g., self-presentation), has not been previously examined in an experimental task. Therefore, the purpose of this study was to investigate if linking an exercise task to a prosocial, self-presentational reward in the form of a charitable giving opportunity influences the amount of effort expended in a single bout of ...


Impact Of Psychological And Physical Stressors On The Exercise-Induced Immune Response In Collegiate Swimmers, Connor Alexander Kuremsky Jan 2019

Impact Of Psychological And Physical Stressors On The Exercise-Induced Immune Response In Collegiate Swimmers, Connor Alexander Kuremsky

LSU Master's Theses

Evidence suggests high-intensity exercise training increases incidence of upper respiratory infection in young-adult athletes (Spence et al. 2007). Collegiate athletes experience chronic stress, which has been shown to result in increased proportions of late-differentiated CD8+ T-cells of a dysfunctional phenotype (Bosch et al. 2009). However, many studies fail to consider possible moderators such as psychological stress and cytomegalovirus (CMV) infection. Purpose: To examine the impact of psychological stress, CMV infection, and exercise on proportions of early- and late-differentiated CD4+ and CD8+ T-cells in collegiate swimmers over a 7-month training period. Methods: Data were collected from NCAA Division 1 swimmers (13 ...


State Population Influences Athletic Performance Combine Test Scores In High School-Aged American Football Players, Zachary M. Gillen, Marni E. Shoemaker, Brianna D. Mckay, Joel T. Cramer Jan 2019

State Population Influences Athletic Performance Combine Test Scores In High School-Aged American Football Players, Zachary M. Gillen, Marni E. Shoemaker, Brianna D. Mckay, Joel T. Cramer

International Journal of Exercise Science

International Journal of Exercise Science 12(6): 256-262, 2019. This study compared athletic performance differences among high school American football combine participants originating from states of different population sizes. High school-aged American football players (n=7,214) who had participated in athletic performance combines between March 2015 and January 2016 were included in this analysis. Data included combine date and location, school state of origin, football position, class, height, weight, 10-, 20-, and 40-yd dash times, pro-agility, L-cone drill, vertical jump, broad jump, and power push-up. Participants were separated into high- (state population>10,000,000; HIGH; n=2,804 ...


Physiological And Perceptual Responses To High-Intensity Circuit Training Using Body Weight Resistance Exercise: Are There Sex-Specific Differences?, Bethanne A. Clayton, Rachel A. Tinius, Lee J. Winchester, Brenna R. Menke, Michelle C. Reece, Jill Maples Jan 2019

Physiological And Perceptual Responses To High-Intensity Circuit Training Using Body Weight Resistance Exercise: Are There Sex-Specific Differences?, Bethanne A. Clayton, Rachel A. Tinius, Lee J. Winchester, Brenna R. Menke, Michelle C. Reece, Jill Maples

International Journal of Exercise Science

International Journal of Exercise Science 12(4): 245-255, 2019. High-intensity circuit training (HICT) using body weight as resistance is a popular fitness trend and an ideal exercise modality in terms of functionality and economy. Given the popularity of HICT, evidence suggests that sex may elicit unique physiological and perceptual responses to this mode of exercise and there is a need for further work in this area. The purpose of this study was to examine physiological and perceptual responses of females and males to HICT using body weight resistance exercise. Forty-five participants (23 females and 22 males) completed baseline testing and ...


Beyond Peak, A Simple Approach To Assess Rowing Power And The Impact Of Training: A Technical Report, Julian D. Egan-Shuttler, Rohan Edmonds, Cassandra Eddy, Veronica O’Neill, Stephen Ives Jan 2019

Beyond Peak, A Simple Approach To Assess Rowing Power And The Impact Of Training: A Technical Report, Julian D. Egan-Shuttler, Rohan Edmonds, Cassandra Eddy, Veronica O’Neill, Stephen Ives

International Journal of Exercise Science

International Journal of Exercise Science 12(6): 233-244, 2019. Recently, rowing power has been shown to be a key determinant of rowing performance. However, rowing power testing can vary greatly, and is not standardized. Here we sought to evaluate rowing power over a 15 sec rowing test utilizing a stroke-by-stroke analysis before and after 4 weeks of training in youth rowers. Methods: 18 adolescent male rowers were assigned to complete either 4 weeks of plyometric training (PLYO, n=9), or steady state cycling (Control, n=9), for 30 minutes before on water training three days/week. Each group was matched ...


A Validation Study Of A Noninvasive Lactate Threshold Device, Rebecca M. Mcmorries, Dustin P. Joubert, Eric J. Jones, Mark D. Faries Jan 2019

A Validation Study Of A Noninvasive Lactate Threshold Device, Rebecca M. Mcmorries, Dustin P. Joubert, Eric J. Jones, Mark D. Faries

International Journal of Exercise Science

International Journal of Exercise Science 12(2): 221-232, 2019. The lactate threshold is considered a key marker of endurance exercise performance and identification of this threshold is important in writing an exercise training program. Unfortunately, assessment of the lactate threshold has traditionally required venous or capillary blood samples and a specialized meter to assess blood lactate concentrations. Recently, a consumer grade, non-invasive device was developed to determine muscle oxygenation and estimate the lactate threshold. Purpose: The aim of this study was to assess the validity of a noninvasive lactate threshold device (NID) to determine lactate threshold heart rate (LTHR). Methods ...