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Effects Of Fluid Consumption Volumes On Fluid Retention During Sodium-Aided Hyperhydration Protocols, Shelby L. Greene, Elizaveta Roslanova, David M. Morris

International Journal of Exercise Science: Conference Proceedings

Numerous investigations have supported the use of sodium-aided hyperhydration to improve hydration status and exercise performance in the heat. Sodium-aided hyperhydration studies typically utilize fluid volumes ranging from 10 - 25 mL ∙ kg bm^-1; however, optimum fluid consumption volumes have not been identified. While it may seem logical that larger fluid consumption volumes would promote greater hyperhydration, excessive expansion of plasma volume could stimulate high-pressure baroreceptors and promote excessive diuresis. PURPOSE: To compare the effects of different fluid consumption volumes on fluid retention during a sodium-aided hyperhydration protocol. METHODS: Urine excretion was measured during four …

The Relationship Of Physiological And Fitness Variables To Performance In Crossfit®-Based Exercise: Preliminary Findings, Matthew F. Brisebois, Matt Sokoloski, Brandon R. Rigby, David L. Nichols Ph.D., Facsm

International Journal of Exercise Science: Conference Proceedings

CrossFit® is a rapidly expanding exercise program as well as an emerging competitive sport. Little is known regarding the correlation of physical fitness measures and performance in CrossFit®-based events. PURPOSE: The purpose of this study was to determine the relationship between various physiological and fitness variables and performance in a typical CrossFit®-based workout. METHODS: Nine male participants (age = 32.2 ± 3.6 yrs; height = 173.1 ± 9.8 cm; weight = 86.1 ± 11.6 kg; BMI = 28.6 ± 1.2 kg/m²) who had performed CrossFit® as their primary exercise program at least 3 days/week for the …

Body Weight Support On Anti-Gravity Treadmill Induces Less Physiological Strain While Running, Ryan A. Gordon, Chris Irvine, Michael Oldham, Matthew Brisebois, Kyle D. Biggerstaff

International Journal of Exercise Science: Conference Proceedings

The anti-gravity treadmill developed by AlterG® can be used as an alternative to traditional treadmill running. The AlterG® unloads an individual’s body weight through lower body positive pressure (LBPP) and can support up to 80% of an individual’s body weight. The cardiorespiratory response resulting from a bout of exercise on an AlterG® treadmill may be attenuated compared to similar exercise on a traditional treadmill. PURPOSE: The purpose of this study was to compare the physiological responses of running at 0%, 15%, 30%, and 45% of body weight support (BWS) on the AlterG® to a traditional treadmill. METHODS: Ten …

Impairment Of Physiological Complexity Of Postural Control Persists Beyond Resolution Of Postural Sway Following Concussion, Amanda Woodruff, Justin Michael Frantz, Laurence J. Ryan, Peter F. Davis, Sushmita Purkayastha

International Journal of Exercise Science: Conference Proceedings

In healthy individuals, physiological functions are regulated by complex integration of multiple control systems, feedback loops, and regulatory processes that enable an individual to adapt to everyday life. The control systems exist at cellular, organ, and systemic levels, operating at various time scales. Entropy analysis can be utilized to assess complexity of physiological systems, including postural control. Higher complexity is associated with better physiological functioning and loss of complexity is associated with pathologies. Increased postural sway is reported following concussion. PURPOSE: Therefore the purpose of this study was to examine postural control dynamics utilizing postural sway and complexity across …

Exploring Health Related Lifestyle Habits And Influences In Rural India, Priyanka Aranha

International Journal of Exercise Science: Conference Proceedings

Background: According to the World Health Organization (WHO) diabetes in India is projected to increase from 31.7 million in 2000 to 79.4 million in 2030. This drastic growth clearly outlines the need for an increase in both awareness and education. Purpose: The purpose of this project was to collaborate with the non-governmental organization, Mysore Resettlement and Development Agency (MYRADA), to develop an understanding of the perspective towards diabetes in the Chitradurga District. Methods: Focus groups were developed within eight villages to discuss lifestyle behaviors (i.e. level of physical activity, leisure time, occupation, nutritional habits, alcohol and tobacco …

Wireless Exercise Monitoring Enhances Cancer Rehabilitation Program, Megan L. Bowlin, Rachel A. Kelley, Hannah L. Lynam, Nathan E. Hall, Emily K. Jost, Emily G. Bontekoe, Natalie G. Kieffer, Dani S. Ingle, Kori E. Ferguson

International Journal of Exercise Science: Conference Proceedings

Cancer rehabilitation increases functional capacity (FC) and health-related quality of life (HRQOL). Exercise monitoring enhances program safety and effectiveness. Advanced monitoring technology and devices may further enhance program quality and integrity. PURPOSE: Examine the use of the Zephyr BioHarness in monitoring and analyzing physiological parameters during a 12-week cancer rehabilitation program. METHODS: Oklahoma cancer survivors (CS) and caregivers (CG) are recruited to participate in the OBU CARES Program, an evidence-based cancer rehabilitation program designed to promote healthy lifestyles, increase FC, and enhance HRQOL. Programming includes an orientation session, fitness testing, exercise prescriptions (ExRx), and supervised exercise sessions. ExRx …

Validity Of Vertical Jump Measuring Devices, Samuel Montalvo, Sandor Dorgo, Colton Tune, Cassie Sapien, Matthew Gonzalez, Jose Sanchez

International Journal of Exercise Science: Conference Proceedings

The vertical jump has been used to assess athleticism in explosive sports. Field measuring methods have been recently introduced to the market. Some of these devices have been previously validated, however, they have not been validated by an independent research institute nor have been concurrently validated in the same training session. PURPOSE: This research intends to conduct an independent validation of alternative vertical jump devices and to validate multiple devices within the same training session. METHODS: 50 physically active University students were recruited for this study. The subjects performed a self-paced 5 minute jog on a treadmill as …

Effect Of Oral Rinsing With Pre-Workout On Cycling Time Trial Performance, Michaela S. Pollaro, Victoria R. Lansford, Andrew M. Avila, John D. Smith

International Journal of Exercise Science: Conference Proceedings

There is evidence that oral rinsing with a carbohydrate solution can have similar effects on aerobic performance compared to consuming the beverage, but less is known of sugar-free and pre-workout beverages. PURPOSE: to examine the effects of oral rinsing with a pre-workout supplement on aerobic performance. METHODS: After recording age (32.4±12.1 yrs), height (173.2±11.2 cm), and weight (76.8±14.8 kg), eleven participants rinsed 10 sec with either 2.5 oz. of carbohydrate (CHO), sugar-free pre-workout (PWO), or a sugar-free placebo (CN) beverage. Participants were interfaced with a metabolic analyzer and resting measurements were collected after two minutes. Participants then cycled …

The Effects Of Blood Flow Restriction Training On Measures Of Strength And Body Composition In College Age Females, Alecia Ann Hicks, Garrett Brandon, Deborah Chandler, Riley Ripley, Austin Torisk, Alison Warnecke, Peggie Williamson, Stacie Urbina, Lem Taylor, Colin Wilborn

International Journal of Exercise Science: Conference Proceedings

Blood flow restriction (BFR) training is a non-invasive technique that uses wraps, bands, or inflated blood pressure cuffs to alter blood flow within targeted muscles. BFR has been seen as a means to potentially help people build muscle mass and strength faster while they are exercising. PURPOSE: The purpose of this study was to compare the body composition and strength changes resulting from traditional resistance training without BFR to the changes resulting from resistance training combined with BFR. METHODS: 21 females with at least one year of resistance training experience were recruited to participate in the study. Participants …

Acute Effects Of Yoga On A Vibration Platform On Heart Rate, Blood Pressure, Flexibility, And Vertical Jump, Ricardo Parra, Elijah Lopez, Jason Mendoza, Joshua Fronk, Arnold Jimenez, Ashley Rivas, Murat Karabulut

International Journal of Exercise Science: Conference Proceedings

Both yoga and whole-body vibration exercise may have a wide-range of positive effects independent of each other. PURPOSE: The purpose of this study was to examine the acute effects of yoga performed on and off a vibration platform on blood pressure, flexibility, and vertical jump. METHODS: Subjects (n = 14; 9 females, 5 males; mean age = 22.5 ±1.9) completed 3randomized protocols of yoga on and off a vibration platform. The testing protocols were: 1) yoga poses on vibration platform with low frequency and low amplitude (PPL), 2) yoga poses on platform with high frequency and high amplitude …

Duchenne Muscular Dystrophy, Scott Onyeokeziri, Zacharias Papadakis

International Journal of Exercise Science: Conference Proceedings

CLINCAL PRESENTATION & EXAM: Duchenne muscular dystrophy (DMD) is an inherited, neuromuscular disorder that affects approximately 1 in 5000 live male births. It is primarily characterized by muscular degeneration due to dystrophin deficiency, a protein found in muscles. There are several varieties of muscular dystrophy disorders—another common one is Becker muscular dystrophy, caused by a truncated, but partially functional DMD gene. DMD begins during childhood, with symptoms starting between 3 and 5 years of age, and it gradually progresses throughout the lifespan of an individual. The first apparent physical sign is an abnormal, waddling-like motion while walking, indication of a …

Associations Between School Transport And Obesity By Gender, Grade, Physical Activity, Race/Ethnicity, And Economic Disadvantage, Allen M. Hallett, Nalini Ranjit, Harold W. Kohl Iii, Kelley Pettee Gabriel, Natalie P. Archer, Deanna M. Hoelscher

International Journal of Exercise Science: Conference Proceedings

Declining rates of active transportation to school have coincided with the childhood obesity epidemic. The contribution of school transport modes to obesity among children may vary by sociodemographic characteristics. PURPOSE: To examine the prevalence of school transport modes and obesity by gender, grade, physical activity, race/ethnicity, and economic disadvantage in a representative sample of Texas school children. METHODS: Cross-sectional data on reported sociodemographic characteristics, school transport mode, and physical activity behavior were collected from the Texas School Physical Activity and Nutrition (SPAN) Survey, 2015-2016. Measured height and weight were used to calculate BMI and classify 4th, 8th, and …

Nitric Oxide Bioavailability At Peak Dynamic Handgrip Exercise In Young Metabolic Syndrome Women, Klaudia Szych, Ariel Gomez, Annajita A. Rubio, Abraham Gomez, Lorenzo Juarez, Andi Johnson, Shannon Jackson, Matthew A. Barlow

International Journal of Exercise Science: Conference Proceedings

The bioavailability of nitric oxide (NO) has been shown to contribute to vascular function during peak exercise. Young women with Metabolic Syndrome (MetSyn) have presented with a deficit in vascular conductance during exercise hyperemia. PURPOSE: The aim of this study is to measure changes in bioavailable blood NO levels at rest and during peak handgrip exercise to determine the mechanistic role of NO on dynamic vascular conductance in women with MetSyn compared to healthy controls during small muscle exercise. METHODS: In this study, 16 participants (7 MetSyn and 9 Controls) performed graded dynamic handgrip while beat-to-beat blood pressure …

Insulin Sensitivity Effects On Peripheral Vascular Responses To Fmd In Metabolic Syndrome Women., Ariel Gomez, Klaudia Szych, Annajita A. Rubio, Shannon Jackson, Matthew A. Barlow

International Journal of Exercise Science: Conference Proceedings

Sedentary populations with obesity and metabolic syndrome (MetSyn) have presented with impaired vascular dysfunction, including vasodilation reduced 40-50%. The mechanisms of vascular endothelial dysfunction has also been associated to the bioavailability of nitric oxide levels and in metabolic compromised individuals the diminished content of endothelial NO are a prime mechanistic target for study. PURPOSE: We hypothesize that decreased reactive hyperemia observed in MetSyn compared to age matched-control patients are primarily due to mechanistic dysfunction of the eNOS pathway and lower Insulin Sensitivity Index (ISI). METHODS: 30 participants (10 MetSyn and 20 Controls) completed brachial FMD testing and vascular …

The Effect Of Sedentary Behavior On Arterial Stiffness In Healthy And Metabolic Syndrome Women, Annajita A. Rubio, Ariel Gomez, Klaudia Szych, Matthew A. Barlow

International Journal of Exercise Science: Conference Proceedings

Overweight and obese physical stature has been associated with increased endothelial dysfunction and the development of cardiovascular disease. This dysfunction may further be progressed as this population develops Metabolic Syndrome and Diabetes. To understand the mechanisms responsible for the vascular dysfunction in the Metabolic Syndrome participants in our research study, we aimed to identify if there is a difference in the Pulse Wave Velocity (PWV) as an effective measurement of peripheral arterial stiffness. Previous studies show that adults with higher superficial femoral artery stiffness experienced greater perceived fatigue and thus are less likely to continue daily physical activity. PURPOSE: …

Exercise Mediated Improvements In Insulin Sensitivity And Metabolic Flexibility Are Not Inhibited By A Family History Of Type 2 Diabetes, Manuel Amador, Cesar Meza, Mario Garcia, Christopher Figueroa, Sudip Bajpeyi

International Journal of Exercise Science: Conference Proceedings

ABSTRACT

A family history of diabetes (FH+) is considered a risk factor for the development of insulin resistance and type 2 diabetes. However, it is not known whether exercise induced improvement in insulin sensitivity (IS) and metabolic flexibility (MF) are impacted by a FH+, compared to those without (FH-). PURPOSE: To determine if a FH+ limits exercise induced improvements in IS, MF, body composition, and strength following an 8-week combined aerobic and resistance training intervention. METHODS: 20 sedentary, normoglycemic, Mexican-American males underwent 8-weeks of combined exercise training 3 times/week (35-min aerobic & 45-min resistance training/session). A controlled diet was provided …

Predicting Energy Expenditure Of An Acute Bout Of Resistance Exercise In Men And Women, Danielle M. Kravits

International Journal of Exercise Science: Conference Proceedings

Energy expenditure from resistance exercise (RE) is an important consideration for exercise prescription, yet prediction models are lacking. PURPOSE: To develop regression equations to predict energy expenditure (kcal) for RE involving each major muscle group using commonly measured demographic & exercise variables as predictors. METHODS: Fifty-two healthy, active subjects (27 men, 25 women, age 20-58 yrs, height 174.1 ± 10.5 cm, weight 188.7 ± 42.6 kg, VO_2max 36.8 ± 9.2 ml/kg/min) were strength tested to determine their 3-5 repetition max (RM) on commercial pneumatic RE equipment 1 week prior to their experimental RE bout. Body composition was assessed using …

Acute High Dietary Phosphate Consumption Impairs Macrovascular, But Not Microvascular Function In Young, Healthy Men, Brandi Y. Stephens, Jasdeep Kaur, Jennifer R. Vranish, Thales C. Barbosa, Auburn L. Johnson, Jeanette Blankenship, Paul J. Fadel

International Journal of Exercise Science: Conference Proceedings

Chronic consumption of inorganic phosphate (P_i) is associated with an increased risk of cardiovascular disease in the general population. Importantly, with the growing abundance of processed foods, dietary intake of P_i in the United States has doubled the daily-recommended amount. However, the influence of acute consumption of high P_i on the cardiovascular system is not clearly understood, with equivocal results reported. Shuto et al. demonstrated that acute consumption of high P_i results in an impairment of endothelial function in healthy subjects, whereas a recent study by Levac et al. has refuted this finding. Moreover, these …

Exercise-Induced Improvement In Oxygen Consumption At Ventilatory Threshold Is Unaffected By Family History Of Diabetes, Christopher Figueroa, Manuel Amador, Cesar Meza, Mario Garcia, Sudip Bajpeyi

International Journal of Exercise Science: Conference Proceedings

A family history of type 2 diabetes (FH+) has been reported to increase the risk for insulin resistance. However it is unknown whether a family history of diabetes impairs lipid oxidation capacity. PURPOSE: To investigate if FH impacts lipid oxidation capacity and oxygen consumption at ventilatory threshold (VT). Additionally, we investigated the effects of 8 weeks of combined exercise training on resting lipid oxidation and oxygen consumption at VT in healthy, sedentary, Mexican American males with and without (FH-) a family history of type 2 diabetes. METHODS: 19 sedentary, normoglycemic, Mexican American males underwent 8 weeks of combined …

Five Week Summer School Program Improved Glucose And Lipoprotein Profiles In Hispanic Female High School Students, Benjamin Son, Anna Bergquist, Rachel Meach, Kyung-Shin Park, Yunsuk Koh

International Journal of Exercise Science: Conference Proceedings

There has been a drastic rise in obese children and adolescents in the past few decades. Evidence suggests that adolescents decrease physical activity during the summer months, contributing to this rise. Purpose: To investigate whether a 5-week summer school program involving physical activity has an effect on plasma glucose levels and lipid profiles among Hispanic female high school students. Methods: Thirty-three female high school students (15-17 years) from an underprivileged Hispanic area in southern Texas were randomly assigned to either an experimental group that participated in a summer school program (n=17) or a control group that did not …

Irisin Treatment During Chronic Inflammatory Bowel Disease In An Rodent Model Improves Bone Formation Rate, Anne M. Anderson, Corinne Metzger, Susan Bloomfield

International Journal of Exercise Science: Conference Proceedings

Bone is a dynamic tissue that responds to many stressors including physical stress and certain disease states. Chronic systemic inflammatory conditions, like inflammatory bowel disease (IBD), result in increased bone resorption and decreased bone formation leading to low bone mass and high fracture incidence. There currently are no effective, safe treatments for IBD. Irisin is a hormone that is released during exercise and has previously been shown to increase bone mass. PURPOSE: Determine if exogenous treatment with irisin can mitigate the inflammatory insult of chronic IBD on bone. We hypothesized that young male rats with induced IBD and treatment …

Effects Of An Acute Strength And Conditioning Bout On Dual Energy X-Ray Absorptiometry Results, Jason R. Lytle

International Journal of Exercise Science: Conference Proceedings

Dual Energy X-ray Absorptiometry (DXA) scans to assess body composition have become increasingly popular, especially in athletic populations. Acute factors, such as hydration status and food intake have been shown to alter DXA results (Tinsley, MSSE 2016). It is currently not known if prior strength and conditioning bouts may alter fat mass, lean mass, and bone density results. PURPOSE: To determine if a strength and conditioning (S&C) bout, similar to what athletes regularly engage in, will alter the fat mass, lean mass, and bone content results of a DXA scan. METHODS: Fourteen strength-trained subjects (10 men, 4 women, age 24 …

Assessment Of Total Plasma Macronutrient Contents By Fourier-Transform Infrared Spectroscopy Following High-Fat Diet And Exercise, Jarrett Walbolt, Arish Bheraiya, Susanna Hamsley, Raegan Chunn, David Gresch, Olademehin Latunde, Sung Kim, Yunsuk Koh

International Journal of Exercise Science: Conference Proceedings

High fat-low carbohydrate (HFLC) diets are a common approach to enhancing overall health and performance in endurance runners. Total macronutrient contents in plasma may change in response to diet and exercise. PURPOSE: To examine the responses of total plasma macronutrient contents in trained males following dietary manipulation in combination with aerobic exercise. METHODS: Eight distance runners that typically consumed high-carbohydrate (HC) diets switched to a HFLC diet for 3 weeks. The caloric intake during the HFLC intervention derived from 70% fats with ≤ 50g of carbohydrates. Participants maintained their normal fitness routines. Indoor treadmill exercise for 50 minutes …

Effects Of Twenty Sessions Core Stability Exercise On Functional Movement And Balance, Joungbo Ko, Jongil Lim, Jiyeon Kim, Sukho Lee

International Journal of Exercise Science: Conference Proceedings

People often experience lower limb injury due to sport activities or falls in their daily life. Core stability exercise may contribute to prevent or minimize the chronic discomfort in skeletal muscle. PURPOSE: The purpose of this study is to investigate the effect of core stability exercise for subjects who have mild discomfort of the lower limb. METHODS: Participants (N=20, 32.3±8.6 yrs, male and female) were randomly divided in two different groups: 10 in the control group and 10 in the exercise group performing core stability exercise program. The core stability exercise consisted of ten main exercises including modified mat pilates …

Fractional Synthetic Rate And Markers Of Protein Turnover Are Altered In The Diaphragms Of Cachectic Mice, Conner A. Benson, Nicholas P. Greene, Jacob L. Brown, Megan E. Rosa-Caldwell, Tyrone A. Washington, Richard A. Perry, Michael P. Wiggs

International Journal of Exercise Science: Conference Proceedings

Cancer cachexia, a wasting syndrome characterized by rapid skeletal muscle wasting and fat loss, directly accounts for up to 20-40% of cancer-related deaths. All muscles, including respiratory muscles, are susceptible to atrophy because cancer cachexia is a systemic disease. Atrophy of the primary breathing muscle, the diaphragm, can lead to respiratory distress, which is commonly associated with a cachectic phenotype. Indeed, the diaphragm is more susceptible to atrophy in certain conditions, but little is known about the effects of cancer-cachexia on protein turnover in the diaphragm. Therefore, investigations into the alterations in protein turnover could provide insight to the molecular …

Acute Exercise-Induced Response Of Platelet-Monocyte Complexes In Obese, Postmenopausal Women, Michael M. Levitt, Maria A. Cardenas, Bryan Richie, Carmen A. Cook, Shaohan Lu, Kara L. Steck, Jay Haynes, Andreas Kreutzer, Joel B. Mitchell, Melody D. Phillips

International Journal of Exercise Science: Conference Proceedings

Inactivity-related diseases such as cardiovascular disease (CVD) are linked to chronic low-grade, systemic inflammation. Platelet-monocyte complexes (PMCs) are markers of in vivo platelet activation and atherosclerosis, and may be early indicators of subclinical inflammation. PURPOSE: To examine the effects of an exercise bout on PMCs in those at risk for CVD. METHODS: Twenty-five overweight-obese (BMI 32.7 ± 5.2 kg×m^-2, 55-75 yr) women were randomly assigned to either the exercise (EX, n=13) or non-exercise control (CON, n=12) group. EX performed 2 sets of 8 resistance exercises and a 25-min treadmill walk at 70-80% HRR. Blood was obtained pre-exercise (PR), …

Ambulatory Blood Pressure Lower Following Aquatic Exercise Than Land Treadmill Exercise, Caitlin Hogan, Dustin P. Joubert

International Journal of Exercise Science: Conference Proceedings

Blood pressure (BP) is an important marker of cardiovascular (CV) health. In addition to resting BP, ambulatory BP (AMBP) measured throughout the day is an independent predictor of CV risk. Aquatic exercise has previously been shown to elicit a greater post-exercise hypotensive response than land exercise, but the effects on AMBP are unknown. PURPOSE: To determine the effects of deep water, aqua jogging exercise versus land treadmill exercise on daytime AMBP in men and women with above normal BP. METHODS: After a resting BP screening, 15 individuals (10 males, 33 ± 14.8 years, 30.4 ± 5.6 kg·m^{-2 …}

Energy Return Characteristics Of Eva And E-Tpu Midsoles During A Drop Jump, Shirin R. Hussain, Kate L. Mitchel, Scott P. Mclean

International Journal of Exercise Science: Conference Proceedings

Expanded Thermoplastic Polyurethane (E-TPU) is a material used in shoe midsoles that has been described as having greater energy return than traditional Ethylene Vinyl-Acetate (EVA) midsole material. PURPOSE: The purpose of this study was to compare the landing and energy return characteristics of shoes using EVA and E-TPU midsoles. METHODS: Ten collegiate female athletes (19.7±1.0 yrs, 75.74±10.9 kg, 1.72±0.08 m) volunteered and provided informed consent to participate in this study. Participants performed five drop jumps from a height of 50 cm under two conditions; while wearing EVA midsole shoes and while wearing E-TPU midsole shoes. Peak force, rate …

Exercise Training Improved Plasma Glucose And Lipid Profiles In Obese Hispanic Women, Yonghyeon Jo, Katie Martin, Kaylee Clyma, Kyung-Shin Park, Yunsuk Koh

International Journal of Exercise Science: Conference Proceedings

Obesity is strongly associated with increased morbidity and mortality, notably among Hispanic women. Exercise may improve cardiovascular health by positively altering plasma lipids and lipoproteins; however, the effects of different intensities of exercise on plasma glucose and lipid profiles have not been extensively studied within Hispanic women. PURPOSE: The current study examined the effects of a 12-week aerobic exercise training at either high or low intensity on plasma glucose and lipid profiles in obese Hispanic females. METHODS: Thirty physically inactive, obese females (age= 26.07±4.4 years, height= 161.4±4.1 cm, weight= 89.8±8.1 kg and %body fat= 40.9 ±4.9%) were randomly …

Cardiac Vagal Tone Impairment Is Associated With Reduced Cerebral Blood Flow In Collegiate Athletes Following Concussion, Madeline N. Wainman, Justin Frantz, Benjamin Williams, Sydney H. Lyng, Tonia Sabo, Kathleen R. Bell Md, Sushmita Purkayastha

International Journal of Exercise Science: Conference Proceedings

Reduced cerebral blood flow (CBF) is linked to functional disturbances following concussion. Since cardiac vagal tone (an index of cardiac health) is associated with disturbances in the autonomic nervous system, deficits in CBF are likely associated with cardiac vagal tone impairment post-concussion. PURPOSE: The current study examined cardiac vagal tone and CBF on days 3, 21 and 90 following concussion in comparison to non-injured control athletes. The association between these two variables was also evaluated. METHODS: Concussed male and female collegiate athletes were evaluated day-3 (N=29), day-21 (N=25) and day-90 (N=17) post concussion and matched controls were enrolled (N=29). A …