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Concurrent Heart Rate And Energy Expenditure Validity Of Polar Verity Sense Devices During Light And Moderate Intensity Resistance Training In Recreationally Active Adults: A Pilot Study, Collin Dawson, Spencer Maxwell, Olivia Perez, Setareh (Star) Zarei, Devin Green, Bethany Hoag, Michael Wong, Dustin Davis, Jeffrey C. Cowley, Merrill Funk, James W. Navalta Facsm, Marcus M. Lawrence

International Journal of Exercise Science: Conference Proceedings

Wearable technology is again the top fitness trend from ACSM for 2024. Our lab recently found that bicep-worn devices (Polar Verity Sense) are valid for measuring average/maximal heart rate (HR) but are not valid for estimating energy expenditure (EE) during acute resistance exercise training (RT). We postulated that the errors may have been due to the device’s algorithms assuming higher intensity during RT, but no study has directly tested these outcomes with various RT intensities. PURPOSE: To determine the concurrent validity of identical Polar Verity Sense bicep-devices to record valid measures of average and maximal HR as well as estimated …

Hydration Behavior Following Education And The Use Of A Hydration Monitoring Device, Victor A. Trujillo, Cynthia Galvez, Aqueen Lenon, Saemi Lee, Brian Bender, George Crocker, Michael S. Joseph

International Journal of Exercise Science: Conference Proceedings

Maintaining proper fluid balance is essential for metabolism, circulation, and temperature regulation. Physical activity, ambient temperature and humidity, fluid intake, and diet are some of the factors that influence a college student’s hydration status. PURPOSE: The purpose of this study was to determine the effects of hydration education and the use of a urinal-based hydration monitoring device (HMD) on hydration status in men on a college campus. METHODS: This study was conducted over eight weeks in a first-floor men’s bathroom located in a natural science building. The design consisted of four 2-wk interventions. The order of the treatments was …

Effects Of Different Caffeine Doses On Fat Oxidation And Cardiovascular Response During Exercise At Fatmax In Overweight/Obese Female College Students, Zhigang Gong, Shihong Yu, Yuquan Ding, Huiying Zhou, Siping Xin, Tianou Zhang

International Journal of Exercise Science: Conference Proceedings

Caffeine is commonly used among athletes for its performance-enhancing effects. However, its impact on fat oxidation in overweight/obese individuals during exercise at maximal fat oxidation intensity (FAT_max) is not well understood. PURPOSE: To examine the effects of different doses of acute caffeine ingestion on fat oxidation and cardiovascular response in overweight/obese female college students during exercise at FAT_max. METHODS: Eleven overweight/obese female college students participated in four trials after ingesting caffeine (3 mg/kg, 5 mg/kg, 9 mg/kg) or a placebo (cellulose). Each trial included 1 hour of rest and 40 minutes of continuous running at FAT …

Feasibility Of A Random-Action Target System For Enhancing Performance Of Experienced Shooters In High-Pressure Scenarios, Mariana Castro, Andreas Stamatis, Ali Boolani, Matthew L. Smith

International Journal of Exercise Science: Conference Proceedings

Effective firearm performance demands accuracy and rapid decision-making, especially for law enforcement, competitive shooters, and military personnel. Traditional training often lacks real-world cognitive challenges, such as decision speed and response inhibition under pressure. This study addresses this gap by incorporating cognitive realism into firearm training to improve shooters’ ability to manage the speed-accuracy trade-off (SAT), where balancing quick reactions with precision is critical to avoid errors in unpredictable scenarios. PURPOSE: To evaluate the feasibility of a non-anticipatory, random-action target system (RATS) by collecting preliminary data on its impact on shooting performance, focusing on accuracy, omission, and commission rates among experienced …

Influence Of Auditory Input On Mood States During A 30-Minute Self-Paced Walk, Maya Caon, Andreas Stamatis, Zacharias Papadakis, Ali Boolani

International Journal of Exercise Science: Conference Proceedings

The therapeutic effects of self-paced walking on mood enhancement are well-documented; yet, existing literature predominantly examines laboratory-based protocols that fail to incorporate auditory stimuli as a potential modulator of mood states. PURPOSE: To investigate the influence of various auditory inputs on mood states during a 30-minute bout of self-paced walking. METHODS: A randomized controlled crossover design was employed (n = 24; 9 males; M_age: 23.04). Participants performed four 30-minute walking bouts around a track while wearing noise-cancelling headphones delivering one of four conditions: positive auditory input, negative auditory input, self-selected music, or silence. Mood states …

Intermittent Hypoxic Breathing With Exercise Mimics Hypoxic Training Spo2 And Improves Waist Circumference And Rmr In Obese Women, Gina Brindisi, Aj Fisher, Adrienne Reid, Adrienne Herrenbruck, Jessie Hirsch, Alexander Rothstein

International Journal of Exercise Science: Conference Proceedings

ABSTRACT

INTRODUCTION: The obesity epidemic is currently overwhelming our healthcare system. Nutrition and exercise therapy are two suggested strategies to manage obesity, but do not always provide a reliable situation for all affected. Increasing exercise efficacy while decreasing the impact and volume of exercise may reduce the risk of injury in obese individuals. PURPOSE: This study aimed to investigate the effects of utilizing a hypoxic breathing protocol, including the impact on body composition, skeletal muscle strength, resting metabolic rate, and blood oxygen (SpO2) values, in obese women (ages 40-65) in order to add evidence to support the use of an …

Chronic Lumbar Radiculopathy With Superior Cluneal And Superior Gluteal Neuropathy, Feras Atassi, Vered Arbel, Aditi Gupte, Tal Amasay

International Journal of Exercise Science: Conference Proceedings

CASE HISTORY: A 39-year-old female presenting with chronic left lower back pain radiating down the leg and affecting the gluteal region. The pain is described as burning and is accompanied by atrophy of the left gluteal muscles. Additional symptoms included muscle weakness and sharp spasms. Functional movements of daily living aggravated pain. PHYSICAL EXAM: Examination identified a decrease in the circumference of the left thigh, tenderness in the Left gluteal region and anterolaterally hip joint, a decrease in ROM of the lumbar spine, muscle weakness on the left lower extremity, and antalgic gait pattern. DIFFERENTIAL DIAGNOSES: Lumbar Radiculopathy, Labral Tear …

The Impact Of Trekking Poles On Smart-Watch Step Counts During Outdoor Hiking In Healthy Adults, Josie Gines, Bethany Hoag, Kavon Mcarthur, Myranda Peck, Catalina Kerwin, Wyatt Fullmer, James W. Navalta, Kelly Goonan, Marcus M. Lawrence, Julie E. Taylor

International Journal of Exercise Science: Conference Proceedings

Hiking is a popular form of recreation with over 57 million participants in the U.S. Many of those hikers also use smart-watches to track their steps, distance and other variables. Anecdotally, the use of trekking poles appears to reduce the accuracy of these smart-watch measures, most notably step counts. PURPOSE: To determine if differences were observed in step counts when hiking with or without trekking poles. METHODS: 10 recreationally active adults (n=5 males, n=5 females, aged 20-39 yrs) randomly completed three trekking pole hiking conditions (no poles, 1 pole, or 2 poles) of ~10 min. uphill and ~10 min. downhill …

The Effects Of Fasting And Circadian Rhythms On Hunger And Mood: A Randomized Cross-Over Study, Bridger H. Murdock, Lizzy Gipson, Bruce W. Bailey

International Journal of Exercise Science: Conference Proceedings

Recent research highlights the role of circadian rhythms in regulating hunger and satiety. Preliminary evidence suggests that fasting earlier in the day may better align with circadian rhythms, potentially leading to lower hunger compared to later fasting windows. PURPOSE: This study aimed to explore the impact of different 24-hour fasting windows on subjective measures of hunger and mood. METHODS: A randomized crossover design was implemented with 24 participants (11 males, 13 females) with a BMI greater than 27. Each participant completed three 24-hour fasts, starting at either 8 am, 1 pm, or 6 pm, with a 5-day washout period …

The Impact Of Trekking Poles On Respiratory And Metabolic Physiological Responses During Outdoor Hiking In Healthy Adults, Bethany Hoag, Josie Gines, Kavon Mcarthur, Myranda Peck, Catalina Kerwin, Wyatt Fullmer, Alexander Jarvis, Cameo Knight, Mckay Pollmann, James W. Navalta, Facsm, Kelly Goonan, Julie E. Taylor, Marcus M. Lawrence

International Journal of Exercise Science: Conference Proceedings

Limited information exists on the effects of trekking poles on respiratory and metabolic physiological responses in outdoor (as opposed to indoor/treadmill) hiking settings on variable (i.e., non-well-groomed) long distance (>250 meters) terrain. Moreover, no study has examined the impact of one or two poles compared to no poles on physiological outcomes in any outdoor hiking setting. PURPOSE: To determine the impact one or two trekking poles has on respiratory and metabolic physiological responses during outdoor hiking compared to no poles. METHODS: 11 recreationally active adults (n=6 males, n=5 females, age: 24.9±6.5 yrs; height: 176.2±12.0 cm; mass: 76.8±13.1 kg) randomly …

Meal Glucose Tolerance Test (Mgtt): A Validation Study, Lindsey P. Stallworth, Jacob Meeks, Mike Nelson, Eliza Middleton, Jacob Page, Alexander Black, Neil Peterson, James Lecheminant, Chad Hancock

International Journal of Exercise Science: Conference Proceedings

Continuous Glucose Monitoring devices (CGMs) allow for a dynamic assessment of postprandial glycemic variability (GV). Using a CGM device, such as the Freestyle Libre Pro, researchers can monitor research participants blood glucose levels continuously for up to 14 days in a free-living environment. Because of this, researchers have begun to rely on CGMs as a tool to understand chronic changes in glycemic responses. PURPOSE: For this research study, we are investigating the viability of using a CGM and standard meal test (MGTT) to assess the glycemic response against a standard Oral Glucose Tolerance Test (OGTT). METHODS: On two separate …

Cross-Sectional Diet Analysis For Musculoskeletal Performance In College Students, Atithi K. Multani, Alexis Bowers, Todd C. Shoepe

International Journal of Exercise Science: Conference Proceedings

Dietary nutrients are a valuable component of musculoskeletal health and performance. PURPOSE: This study aims to describe quality of dietary intake and relationships of nutrients on muscle strength performance through nutritional diet logs in college students. METHODS: The 41 participants (21 females and 20 males, aged 20.19±1.74 years, BMI: 24.57±4.11) recorded a single-day nutrient diet record which was analyzed with NutriCalc. Maximal voluntary contractions were acquired for ten isokinetic, isotonic, and handgrip strength variables and analyzed via bivariate correlation on SPSS. RESULTS: In men, daily fiber (grams/kg/bw) showed significance for elbow extension (r=0.413, p=0.035), knee flexion peak …

Relationship Between Fat-Free Mass Index, Body Composition, Sports Nutrition Knowledge, And Sleep Quality In Female Soccer Players, Samantha Campuzano, Michael Rodriguez, Haydin Pazdur, Guillermo Escalante, Jason Ng

International Journal of Exercise Science: Conference Proceedings

Previous research has reported an inverse relationship between body fat percentage (BF%) and sports nutrition knowledge (SNK) in athletes. Fat-free mass index (FFMI) is a related measurement that allows for the normalization of fat-free mass (FFM) by dividing the FFM in kg by height in meters squared. However, it is unknown whether this variable is influenced by an athlete’s SKN and sleep quality. PURPOSE: To examine the relationship between FFMI, BF%, total body water (TBW), SNK, and sleep quality score (SQ) in Division II female soccer players. METHODS: Twenty-eight women (Mean + SD: Age = 19.4 ± 1.1 …

The Effect Of Percussive Massage On Skeletal Muscle Mitochondrial Respiration During Limb Immobilization, James Bartling, Robert D. Hyldahl, Mohadeseh Ahmadi, Chad Hancock

International Journal of Exercise Science: Conference Proceedings

Skeletal muscle disuse is a common occurrence due to injury, illness, or other factors. Periods of disuse can have a profound negative impact on muscle mitochondrial function and metabolic health. Passive mechanical stimulation of skeletal muscle has demonstrated potential to improve muscle metabolic function in previous research. PURPOSE: Investigate the effect of percussive massage (PM), a trending form of muscle mechanical stimulation, on mitochondrial function and cellular metabolic pathways during a period of disuse. METHODS: 8 women and 9 men (18-35 yrs.) were randomly assigned to a control or massage group during a period of lower limb immobilization for 10 …

Dietary Supplement Use And Motivations In Competitive Vs. Non-Competitive Athletes, Amber Hadfield, Abigail Larson

International Journal of Exercise Science: Conference Proceedings

Dietary supplements come in various forms, including powders, bars, gummies, liquids, tablets, and capsules and are commonly used by athletes. Motivations for supplement use are varied and may be influenced by sport type and competitive goals. PURPOSE: This study aimed to compare supplement usage and reasons for consumption between competitive (C) and non-competitive (NC) strength and power athletes. METHODS: Strength and power athletes were recruited from a local training center to complete an online survey distributed via QR code and online link. Data collected included competition status, supplements consumed, reasons for use, and knowledge of U.S. supplement regulations. Responses were …

The Relationship Between Light Physical Activity And 10-Year Weight Change In 2,868 U.S. Adults: An Nhanes Investigation, Chloe Cory, Larry A. Tucker

International Journal of Exercise Science: Conference Proceedings

The prevalence of obesity has steadily increased for the past several decades. About 13.4% of Americans aged 20-74 had obesity in 1960-1962 and the prevalence jumped to 42.8% in 2017-2018—more than a 3-fold increase. PURPOSE: The aim of this study was to evaluate the relationship between time spent in light physical activity (LPA) and 10-year weight change in a random sample of 2868 women and men representative of the U.S. adult population. METHODS: Cross-sectional data was used from the National Health and Nutrition Examination Survey (NHANES) from the 2003-2006 data cycles. Participants were limited to non-pregnant U.S. adults …

The Impact Of Music On Rating Of Perceived Exertion And Perceived Fatigue During An Acute Light And Moderate Intensity Deadlift Session In Recreationally Active Adults, Spencer M. Maxwell, Olivia Perez, Seterah (Star) Zarei, Devin Green, Micheal Wong, Dustin Davis, Wyatt Fullmer, Alex Jarvis, Jeffery C. Cowley, Merrill Funk, James Navalta, Facsm, Marcus M. Lawrence

International Journal of Exercise Science: Conference Proceedings

Self-selected music has been found to have an ergogenic effect on certain parameters of resistance training (e.g., maximal strength) and studies have largely focused on upper body outcomes (e.g., bench press or handgrip). However, very few studies have examined lower body exercises as well as compared exercise intensities. PURPOSE: To determine, compared to no music, the effect music has on perceived exertion and fatigue during an acute session of the deadlift exercise at various intensities. METHODS: 12 recreationally active adults (n=5 females, n=7 males, age: 29.9±7.5 yrs; mass: 87.7±27.6 kg; height: 178.1±12.1 cm) completed 4 sets of 6 repetitions of …

Early And Later Stage Muscle Recovery From Lengthening Contraction-Induced Injury In Cigarette Smoke-Exposed Mice, Lloyd K.T. Marshall, William Wong, Tyler M. Kent, Jacob Baker, Kyle Parks, Nicholas Trathen, Kyle Dominguez, Kristen Keeble, Christopher Alfaro, Drew Johnson, Rafael Parnes, Andrew Tambunting, Alex Yee, Leonardo Nogueira Phd

International Journal of Exercise Science: Conference Proceedings

The use of tobacco products is associated with lower recovery from strenuous exercise, and mice exposed to cigarette smoke (CS) show impaired myofiber cross sectional area recovery from muscle injury. PURPOSE: To investigate the effects of short-term (i.e., 8 weeks) CS exposure on the early (7 days) and later stage (14 days) in vivo torque recovery of anterior crural muscles, EDL muscle force, and TA myofiber formation recovery after lengthening contractions (LCP). METHODS: Adult male (n=14) and female (n=13) mice expressing tdTomato fluorescent protein in satellite cells (Pax7CreER-Ai9, 8 weeks old) were daily exposed to smoke produced from …

Effect Of Intranasal Insulin On Neurovascular Coupling In Healthy Young Adults, Brian Shariffi, Neil Mcmillan, Anna Gonsalves, Camila Manrique-Acevedo, Jaume Padilla, Jacqueline Limberg

International Journal of Exercise Science: Conference Proceedings

ABSTRACT

Emerging evidence supports an essential role for insulin signaling in neurovascular coupling (NVC) – the link between neuronal activity and cerebral blood flow. In preclinical animal models, impaired insulin signaling is associated with reduced NVC, highlighting the neurogenic role of insulin. However, it remains unclear whether brain insulin stimulation can enhance NVC in humans. PURPOSE: To examine the acute effect of intranasal insulin delivery on NVC. We hypothesized intranasal insulin would augment NVC in healthy young adults. METHODS: Carotid artery blood flow (CBF, Doppler ultrasound) and middle cerebral artery blood velocity (MCAv, transcranial Doppler ultrasound) were measured during …

The Effects Of Stair Stepping On Circadian Dependent Postprandial Glycemic Responses, William Wong, Morgan Van Ness, Jeff Moore, Jochen Kressler

International Journal of Exercise Science: Conference Proceedings

Elevated levels of postprandial blood glucose (PBG) is related to Diabetes Mellitus which is associated with severe health complications. Bouts of stair stepping as little as one minute have shown to be effective at reducing PBG when performed in the morning. Studies have not yet investigated whether the effects of stair stepping on blood glucose translate to different times of day. PURPOSE: The purpose of this study is to test whether one minute of stair stepping at a comfortable pace can reduce blood sugar after meals. METHODS: 23 participants were asked to wear a continuous glucose monitor (CGM) …

Investigating The Impact Of Ssris On Cardiovascular Risk Factors In Young Healthy Individuals: A Preliminary Study, Elena S. Shostak, Jillian M. Lang, William Quinn, Valerie Chervinskaya, Elisa Fioraso, Everett Smith, Christopher J. Kotarsky, Justin A. Deblauw, Jennifer Lloyd, Stephen J. Ives

International Journal of Exercise Science: Conference Proceedings

Selective serotonin reuptake inhibitors (SSRIs) are a class of antidepressants that are commonly used to treat anxiety, depression, and other psychological disorders. The effects of SSRIs on cardiometabolic health in young and healthy populations have not been well described. PURPOSE: We evaluated the effects of SSRI useon blood pressure (BP), heart rate variability (HRV), arterial stiffness, and microvascular function, of young, otherwise healthy adults. METHODS: Fourteen healthy males and females aged 18-41 were included in this study, separated by use of SSRIs, and matched into pairs based on sex, age, height, and weight. Anthropometrics, BP, arterial stiffness, HRV, …

Investigation Into Chin-Force Of Violinists, Ciya Clyde, Miles Mercer, Julia Freedman Silvernail

International Journal of Exercise Science: Conference Proceedings

Pain and discomfort have become a routine part of life for many orchestral musicians. Violinists in particular experience high number of injuries in their upper body, including the neck, shoulders, and arms. Force applied to the instrument at the chin provides the stabilization of the instrument required for performance but may contribute to these injuries. Due to the scarcity of research on musicians' physical health, it is challenging to determine the sources of musculoskeletal injuries in violinists. Nonetheless, examining the force applied at the chin could serve as a valuable starting point for investigation. PURPOSE: To investigate how chin-force is …

Intermittent Amp-Activated Protein Kinase Activation Promotes Myotube Hypertrophy, Isaac S. Stark, Abigail E. Summers, Jack E. Barbeau, Neal A. Secrist, David M. Thomson

International Journal of Exercise Science: Conference Proceedings

Muscle atrophy is a concern in various health conditions, such as aging, cancer, and diabetes. As such, finding effective therapies to treat muscle loss is of significant value. The best treatment for muscle atrophy is exercise. However, many with these conditions either cannot or will not exercise. This highlights the value of finding an effective pharmacologic therapy. AMP-activated protein kinase (AMPK) is one of the best-characterized exercise-responsive molecular signals. Despite suppressing muscle synthesis acutely, chronic AMPK activation has been shown to prevent muscle loss in wasting conditions. Our collaborator company, Biolexis Therapeutics, has identified MLX-0871 as a novel AMPK-activating oral …

Acute Impacts Of A Novel Proprietary Supplement Blend On Aerobically-Focused Outcomes In Trained Crossfit Athletes: A Preliminary Analysis, Ashley Holland, Evan Hedrick, Jason Michael Cholewa, Steven Machek

International Journal of Exercise Science: Conference Proceedings

CrossFit is a high-intensity sport that requires high cardiovascular fitness but aerobically-focused supplements are sparsely investigated within this demographic PURPOSE: to examine the efficacy of a novel ergogenic supplement blend on various cardiovascular metrics in CrossFit athletes. METHODS: 11 trained CrossFit athletes (30±6y; 3M/8F) were recruited for this acute, placebo-controlled study, whereby participants visited the laboratory on a single day to assess baseline resting heart rate (RHR), blood pressure (BP), and fingertip lactate (LAC) immediately prior to being randomly assigned to ingest either 4ml of a proprietary supplement blend (SUP; containing Beetroot, Ashwagandha, Arjuna, Rhodiola, and Cayenne) …

Use Of Caffeine In 19,660 U.S. Adults: The Role Of Overweight And Obesity, Frank Beltran, Larry A. Tucker

International Journal of Exercise Science: Conference Proceedings

Caffeine is one of the most consumed drugs in the United States. PURPOSE: The present cross-sectional investigation was conducted to determine the relationships between BMI and waist circumference, and caffeine intake. The specific objective was to determine whether those with higher BMIs or larger waists consume more caffeine than other adults. METHODS: A sample of 19,960 randomly selected women and men representing the U.S. adult population was studied. Data was collected as part of the National Health and Nutrition Examination Survey (NHANES) from 2009 through 2018. A number of covariates were controlled statistically to minimize their influence on …

Relationships Between Energy Availability, Dietary Restraint, And Body Image Concerns Among Olympic Weightlifters, Hannah Parducho, Michelle Barrack Phd, Rd, Cssd, Fascm, Joshua Cotter Phd, Facsm, Cscs, Nsca-Cpt, Eim, Virginia Gray Phd, Rd

International Journal of Exercise Science: Conference Proceedings

Athletes with low energy availability (LEA) may face reduced health and performance outcomes. Few studies have examined the energy availability (EA) of Olympic weightlifters and its relationships with nutrient adequacy, disordered eating, and body image. PURPOSE: To evaluate EA among weightlifters and to examine the relationship between LEA with dietary restraint and/or body image concerns. METHODS: Twenty-two female and 9 male adult competitive weightlifters (age 30.7 ± 9.0 years; weight 75.5 ± 16.6 kg; height 1.6 ± 0.1 m) completed an online survey. The Nutrition Screening Survey (NSS) assessed nutrient intake and EA. Athletes were classified as having …

The Effects Of Resisted Sprinting, Motor Imagery, Or A Dynamic Warm-Up Alone On Sprinting Performance In Recreationally Active Adults, Kimberly Rogers, Suzanne L. Young, Marcus M. Lawrence

International Journal of Exercise Science: Conference Proceedings

Limited information exists on directly comparing active (e.g., involving physical movement/muscle contractions) or passive (e.g., no physical movement/muscle contractions) warm-ups to enhance sprint performance. PURPOSE: To determine the effects of an active dynamic warm-up with a resisted sprinting potentiating stimulus (DyWU+RS), a dynamic warm-up with motor imagery (DyWU+MI), or a dynamic warm-up alone (DyWU) on max velocity sprinting performance in recreational athletes. METHODS: 16 recreational adult athletes (n=8 female, n=8 male, aged 18-34 years old) randomly completed three warm-up conditions in the same session. Participants performed a standardized dynamic warm-up alone (DyWU), a DyWU followed by a resisted sprinting (10% …

Identifying Predictors Of Fat Oxidation In Response To Exercise Prescribed According To Relative And Metabolic Intensities, Athrva Deshpande, Todd Astorino Ph.D

International Journal of Exercise Science: Conference Proceedings

Capacity for fat oxidation (FOx) is related to endurance performance and metabolic health. Chrzanowksi-Smith et al. (2021) revealed that maximal O₂ consumption (VO₂max), resting FOx, and physical activity level significantly predict maximal fat oxidation. PURPOSE: To identify predictors of the metabolic response to endurance exercise. METHODS: Active, non-obese men and women (N = 36, age and VO₂max = 24 ± 4 yr and 2.8 ± 0.8 L/min) underwent 3 sessions of cycling separated by 3 – 7 days. All bouts were performed at the same time of day within participants. Initially, body fat and fat-free …

The Effect Of Beetroot Juice Supplementation Dose On Neuromuscular Performance During Resistance Exercise, Raymond T. Gerardo, Isabella G. Lincoln, Keonabelle P. Paniagua, Justin M. Foster, Lauren E. Wideen, Nathan J. Ornelas, Isaac Tchaprazian, Jeffrey Li, Michael Egiazarian, Adam Pennell, Rachel Tan

International Journal of Exercise Science: Conference Proceedings

Nitrate-rich beetroot juice may have more pronounced ergogenic effects on exercise that requires high-power and high-velocity muscle contraction; however, the efficacy of, and the optimal dosing for nitrate to enhance resistance exercise performance is unknown. PURPOSE: To assess whether nitrate elicits dose-dependent ergogenic effects during a battery of resistance exercises in resistance-trained men. METHODS: Eighteen resistance-trained men were assigned in a randomized, double-blind, crossover design to consume 280 ml nitrate-depleted beetroot juice (PL; negligible nitrate), 70 ml nitrate-rich beetroot juice and 210 ml nitrate-depleted beetroot juice (BR-LOW; ~6.5 mmol nitrate), 140 ml nitrate-rich beetroot juice and 140ml nitrate-depleted …

No Sex Differences In Metabolic Responses To Submaximal Exercise, Alexander J. Macdonald, Alexander M. Anderson, Hanna Lauritzen, Ryan Pinter, Madison Mower, Todd Astorino Ph.D Facsm

International Journal of Exercise Science: Conference Proceedings

Tarnopolsky et al. (1990) showed significantly higher fat oxidation (FOx) in women versus men during endurance exercise, likely due to their higher concentrations of estrogen and type I muscle fibers. Prior studies support this stance (Venables et al. 2000), yet Wallis et al. (2006) showed no effect of sex on the metabolic response to exercise. PURPOSE: To compare substrate metabolism between men and women during submaximal exercise prescribed using metabolic (percent ventilatory threshold, %VT) and relative (percent maximal heart rate, %HRmax) intensities. METHODS: Healthy, non-obese men (n = 23) and women (n = 13) (age, % fat, and VO_{2 …}