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Full-Text Articles in Physiology
Nutrient Intake, Performance, And Body Composition Of Preseason Wrestlers, Gregory-James Coapstick, Allison Barry, Crystal Levesque, Marni Shoemaker
Nutrient Intake, Performance, And Body Composition Of Preseason Wrestlers, Gregory-James Coapstick, Allison Barry, Crystal Levesque, Marni Shoemaker
International Journal of Exercise Science
International Journal of Exercise Science 17(2): 517-530, 2024. College athletes, especially in weight class sports, often experience energy deficits. Athletes competing in weight class sports such as wrestling are at greatest risk for deficiencies and little is known about the relationships between body composition, nutrient intake, and performance in these athletes. The purposes of this study were to (1) quantify macronutrient and micronutrient intake of pre-season male collegiate wrestlers and compare to estimated needs, and (2) examine relationships among nutritional intakes, body composition, and performance measurements of strength and anaerobic capacity. Male Division I wrestlers (n = 11, age: …
Progressive Arm Cycling Ergometry With 3- And 5-Minute Stage Durations Yields Similar Estimates Of Substrate Oxidation In Healthy Adults, Todd A. Astorino Ph.D, Zachary Jordan, Cristian Gonzales, Carly Schuerger, Muhammed M. Atakan
Progressive Arm Cycling Ergometry With 3- And 5-Minute Stage Durations Yields Similar Estimates Of Substrate Oxidation In Healthy Adults, Todd A. Astorino Ph.D, Zachary Jordan, Cristian Gonzales, Carly Schuerger, Muhammed M. Atakan
International Journal of Exercise Science
International Journal of Exercise Science 17(2): 468-479, 2024. Arm cycling ergometry (ACE) leads to a lower maximal oxygen uptake (VO2max) than cycling which is related to a smaller active muscle mass. This study compared estimates of fat and carbohydrate oxidation (FOx and CHOOx) between progressive exercise protocols varying in stage duration in an attempt to create a standard exercise protocol for determining substrate metabolism using ACE. Four men and seven women (age = 24 ± 9 yr) unfamiliar with ACE completed incremental exercise to determine peak power output and VO2peak. During two subsequent sessions completed after …
Low Energy Availability, Disordered Eating, Exercise Dependence And Fueling Strategies In Trail Runners, Keely Henniger, Kelly Pritchett, Namrita Kumar Brooke, Leah Dambacher
Low Energy Availability, Disordered Eating, Exercise Dependence And Fueling Strategies In Trail Runners, Keely Henniger, Kelly Pritchett, Namrita Kumar Brooke, Leah Dambacher
International Journal of Exercise Science
International Journal of Exercise Science 16(2): 1471-1486, 2023. Under fueling, disordered eating (DE), exercise dependence (EXD), and high training demands relative to energy intake may increase the risk of low energy availability (LEA) in endurance and ultra-endurance athletes. The purpose of this study was to evaluate the prevalence of LEA risk and relationship with risk of DE, EXD, and fueling habits during training and competition in endurance runners. Trail runners between the age of 18-40 (n = 1,899; males: n = 510, females: n = 1,445) completed a 45-question survey using Qualtrics that included training and racing characteristics, questions …
Quercetin In Sports And Exercise: A Review, Jennifer Kurtz, Trisha Vandusseldorp, Jeff Otis
Quercetin In Sports And Exercise: A Review, Jennifer Kurtz, Trisha Vandusseldorp, Jeff Otis
International Journal of Exercise Science
International Journal of Exercise Science 16(2): 1334-1384, 2023. This paper systematically reviews the latest evidence regarding Quercetin’s (Q) effect following exercise performance, aerobic and anaerobic exercise, muscle-damaging bouts and highlights blood biomarkers associated with muscle damage and recovery. Google Scholar, Web of Science, and MedLine (PubMed) searches were conducted through July- December 2021. Peer-reviewed studies that investigated Q as a single ingredient or in combination with other ingredients at dosages of 500 mg - 3000 mg, ranging from 15 min-to-1 h prior to exercise bout or chronic dose (7 days - 8 weeks) of consumption were included. A total of …
Training Status Impacts Metabolic Response To A High-Protein Weight Loss Diet In Recreationally Resistance-Trained Females., Alyssa A. Olenick, Regis C. Pearson, Nathan T. Jenkins
Training Status Impacts Metabolic Response To A High-Protein Weight Loss Diet In Recreationally Resistance-Trained Females., Alyssa A. Olenick, Regis C. Pearson, Nathan T. Jenkins
International Journal of Exercise Science
International Journal of Exercise Science 16(2): 377-392, 2023. This study investigated the effects of a novel high-protein diet template on postprandial metabolism and body composition (e.g., waist and hip circumference, body fat (%), fat mass, fat-free mass) in recreationally resistance-trained females. Fifteen females adhered to an eight-week high-protein dietary intervention (~1.5-1.6 g·kg-1·day-1) administered via template format. Pre- and post-intervention visits included anthropometrics, measurement of body composition, and an acute high-fat meal challenge. The high-fat meal challenge (61% fat) consisted of fasting postprandial blood glucose, resting metabolic rate (RMR), fat and carbohydrate oxidation assessed at 60-, 120-, …
The Effects Of Carbohydrate Intake On Body Composition And Muscular Strength In Trained Men Undergoing A Progressive Resistance Training, Alex Silva Ribeiro, Kamila Quintilhano, Witalo Kassiano, João Pedro Nunes, Ademar Avelar, Michele C. Trindade, Andreo Aguiar, Brad Schoenfeld, Edilson Serpeloni Cyrino
The Effects Of Carbohydrate Intake On Body Composition And Muscular Strength In Trained Men Undergoing A Progressive Resistance Training, Alex Silva Ribeiro, Kamila Quintilhano, Witalo Kassiano, João Pedro Nunes, Ademar Avelar, Michele C. Trindade, Andreo Aguiar, Brad Schoenfeld, Edilson Serpeloni Cyrino
International Journal of Exercise Science
International Journal of Exercise Science 16(2): 267-280, 2023. This study's purpose was to compare the effects of different carbohydrate (CHO) intakes on body composition and muscular strength following eight weeks of resistance training (RT) in pre-conditioned men. In addition, we explored the individual responses to different CHO intakes. Twenty-nine young men volunteered to participate in this study. The participants were divided into two groups according to their relative CHO intake: lower (L-CHO; n = 14) and higher (H-CHO; n = 15). Participants performed a RT program four days a week for eight weeks. The lean soft tissue (LST) and fat …
Astaxanthin Reduces Heart Rate And Carbohydrate Oxidation Rates During Exercise In Overweight Individuals, Alissa Wika, Kyle W. Reason, Matt Green, Lauren Killen, Matthew J. Mcallister, Hunter Waldman
Astaxanthin Reduces Heart Rate And Carbohydrate Oxidation Rates During Exercise In Overweight Individuals, Alissa Wika, Kyle W. Reason, Matt Green, Lauren Killen, Matthew J. Mcallister, Hunter Waldman
International Journal of Exercise Science
International Journal of Exercise Science 16(2): 252-266, 2023. Astaxanthin (AX) is an antioxidant which may spare endogenous carbohydrates and improve fat oxidation rates, thus improving metabolic flexibility. To date, no studies have attempted to examine the impact of AX in an overweight cohort, whom often suffer from metabolic inflexibility. Nineteen subjects (mean ± SD: age: 27.5 ± 6.3 years; height: 169.7 ± 9.0 cm; body mass: 96.4 ± 17.9 kg; BF%: 37.9 ± 7.0%; BMI: 33.4 ± 5.6 kg/m2; VO2peak: 25.9 ± 6.7 ml·kg−1·min−1) were recruited and supplemented with either 12 mg …
A Pilot Study On Cannabidiol (Cbd) And Eccentric Exercise: Impact On Inflammation, Performance, And Pain, Whitley J. Stone, Danilo Tolusso, Guillermo Pacheco, Shea M. Brgoch, Van T. Nguyen
A Pilot Study On Cannabidiol (Cbd) And Eccentric Exercise: Impact On Inflammation, Performance, And Pain, Whitley J. Stone, Danilo Tolusso, Guillermo Pacheco, Shea M. Brgoch, Van T. Nguyen
International Journal of Exercise Science
International Journal of Exercise Science 16(2): 109-117, 2023. Cannabidiol (CBD) is a non-psychoactive cannabinoid purported to reduce symptoms of discomfort. Individuals are now using CBD to treat symptoms of multiple sclerosis, seizures, and chronic pain. Animal models indicate that CBD may be effective at reducing inflammation post fatiguing exercise. However, little evidence is available to evaluate these findings in humans. Therefore, the purpose of this investigation was to evaluate the impact of two doses of CBD oil on inflammation (IL-6), performance, and pain after an eccentric loading protocol. Participants (n = 4) participated in three conditions (placebo, low dose, …
Four Weeks Of Hericium Erinaceus Supplementation Does Not Impact Markers Of Metabolic Flexibility Or Cognition, Corey Grozier, Victor Alves, Lauren Killen, Eric O'Neal, Jeffrey Simpson, Hunter Waldman
Four Weeks Of Hericium Erinaceus Supplementation Does Not Impact Markers Of Metabolic Flexibility Or Cognition, Corey Grozier, Victor Alves, Lauren Killen, Eric O'Neal, Jeffrey Simpson, Hunter Waldman
International Journal of Exercise Science
International Journal of Exercise Science 15(2): 1366-1380, 2022. Hericium erinaceus (HE), also known as Lion’s Mane mushroom, has been found to enhance cognition and metabolic flexibility in various animal models. To date however, only four studies exist in humans and none have evaluated the effects of HE on markers of metabolic flexibility or cognitive performance. A single-blind, placebo controlled, parallel-longitudinal study was used to determine the effects of HE on markers of metabolic flexibility and cognition. Twenty-four participants completed a graded exercise test on a cycle ergometer to analyze substrate oxidation rates and markers of cardiorespiratory fitness. Additionally, two dual-task …
The Acute Effect Of In Natura Beetroot Juice Intake On Intra-Session Exercise Sequences During Concurrent Training, Diego Souza, Julio Ribeiro, Andrea Simão, Millán Aguilar-Navarro, Marcos Polito
The Acute Effect Of In Natura Beetroot Juice Intake On Intra-Session Exercise Sequences During Concurrent Training, Diego Souza, Julio Ribeiro, Andrea Simão, Millán Aguilar-Navarro, Marcos Polito
International Journal of Exercise Science
International Journal of Exercise Science 15(2): 1075-1085, 2022. The purpose of this study was to analyze the acute effects of in natura beetroot juice intake on intra-session exercise sequences during concurrent training. Following a randomized double-blind placebo-controlled crossover design, 20 well-trained men (21.4 ± 2.9 years; 74.8 ± 6.3 kg; 175.7 ± 5.0 cm) performed two concurrent training sessions with different intra-session exercise sequences: CT1 (aerobic exercise + resistance exercises) and CT2 (resistance exercises + aerobic exercise). The resistance exercises were bench-press, lat-pull down, and shoulder-press (three sets to failure; 2 s cadence for the concentric and eccentric phases; 90 …
The Effects Of Acute Caffeine Supplementation On Repeated-Sprint Ability In Healthy Young Non-Athletes, Michael D. Belbis, Peter J. Chomentowski 3rd, Clayton L. Camic, Steve M. Howell, Shuqi Zhang
The Effects Of Acute Caffeine Supplementation On Repeated-Sprint Ability In Healthy Young Non-Athletes, Michael D. Belbis, Peter J. Chomentowski 3rd, Clayton L. Camic, Steve M. Howell, Shuqi Zhang
International Journal of Exercise Science
International Journal of Exercise Science 15(2): 846-860, 2022. The ergogenic effects of caffeine supplementation on repeated-sprint ability (RSA) have produced equivocal results. This study aimed to examine the effects of 200 mg of caffeine during repeated-sprint running on heart rate (HR), rating of perceived exertion (RPE), blood lactate (BLa) concentration, and sprint time (ST). Thirty-two individuals (males: n = 17, females: n = 15; age: 22 ± 1 years) participated in the study. The study followed a double-blind, randomized, placebo-controlled, crossover design, in which each participant ingested 200 mg of caffeine or placebo on separate visits 60 minutes prior to …
Lifestyle Choices And Risk Of Developing Cardiovascular Disease In College Students, Dieu-My T. Tran, Angela E. Silvestri-Elmore, Angela Sojobi
Lifestyle Choices And Risk Of Developing Cardiovascular Disease In College Students, Dieu-My T. Tran, Angela E. Silvestri-Elmore, Angela Sojobi
International Journal of Exercise Science
International Journal of Exercise Science 15(2): 808-819, 2022. The purpose of the study was to examine and evaluate the cardiovascular risk factors in college students including their nutritional and social choices and how those choices related to their cardiovascular health. A descriptive, cross-sectional study of 148 college students, obtaining their blood pressure, body mass index, fasting lipid panel, fasting glucose, hemoglobin A1c, serum cotinine levels, physical activity, alcohol consumption, and dietary habits. A high prevalence of cardiovascular disease risk factors was found: 23.8% were current or past smokers with more male than female smokers (p = .009); 65.5% consumed …
The Relationship Between Eating Disorders, Weight Control Methods, And Body Satisfaction In Elite Female Runners Competing At The 2020 U.S. Olympic Marathon Trials, Sophia Charitou, Kelly Pritchett, Dana Ogan, Abigail Larson
The Relationship Between Eating Disorders, Weight Control Methods, And Body Satisfaction In Elite Female Runners Competing At The 2020 U.S. Olympic Marathon Trials, Sophia Charitou, Kelly Pritchett, Dana Ogan, Abigail Larson
International Journal of Exercise Science
International Journal of Exercise Science 15(2): 721-732, 2022. Athletes participating in endurance sports report frequent attempts to lose weight and greater training volumes in attempt to gain a competitive advantage. Increased exercise energy expenditure through training, weight periodization, and prevalence of eating disorder (ED) may affect energy availability. Low energy availability (LEA) is associated with negative physiological effects and an increased risk of bone fractures and illness in athletes. This study investigated the relationship between self-reported history of an ED with training, body satisfaction, and weight-control methods among female Olympic marathon trials participants. Female runners (n = 146; 30.8 …
Stimulus Expectancy And Stimulus Response Of Caffeine On 4-Km Running Performance: A Randomized, Double-Blind, Placebo-Controlled And Crossover Study, Giovanna Rohloff, Diego Souza, Carlos Ruiz-Moreno, Juan Del Coso, Marcos Polito
Stimulus Expectancy And Stimulus Response Of Caffeine On 4-Km Running Performance: A Randomized, Double-Blind, Placebo-Controlled And Crossover Study, Giovanna Rohloff, Diego Souza, Carlos Ruiz-Moreno, Juan Del Coso, Marcos Polito
International Journal of Exercise Science
International Journal of Exercise Science 15(2): 645-654, 2022. The placebo effect of caffeine has been poorly investigated in endurance exercise. Therefore, the aim of this study was to analyze the placebo effect of caffeine on 4 km running performance in amateur runners. Twenty-two healthy and recreational male runners (25.5 ± 8.4 yrs; 75.0 ± 7.1 kg; 173.7 ± 6.3 cm) underwent a deceptive experimental design consisting of three different sessions: a) control (CON) in which participants did not ingest any substance; b) placebo (PLA) in which participants ingested a capsule filled with maltodextrin but they were informed that they would …
Fluid Restriction Dehydration Increase Core Temperature During Endurance Exercise Compared To Exercise Induced Dehydration, Jessica E. Sansone, Mary S. Guyer, Elizabeth M. Mullin, Brian Thompson
Fluid Restriction Dehydration Increase Core Temperature During Endurance Exercise Compared To Exercise Induced Dehydration, Jessica E. Sansone, Mary S. Guyer, Elizabeth M. Mullin, Brian Thompson
International Journal of Exercise Science
International Journal of Exercise Science 15(2): 166-176, 2022. This study aimed to evaluate the difference in heart rate and core temperature during aerobic exercise between two forms of dehydration: exercise-induced (EI) and fluid restricted (FR). Twenty-two subjects (N = 22; 83.35 ± 13.92 kg) completed the current study, performing a familiarization session, a pre-experimental exercise session, and two exercise testing sessions. The EI exercise trial (81.52 ± 13.72 kg) was conducted after performing exercise in a hot environment to lose three to four percent of body weight and partial rehydration. The FR exercise trial (81.53 ± 14.14 kg) …
Caffeinated Gum Does Not Influence Rpe-Regulated Cadence In Recreationally-Active, College Females Regardless Of Habitual Caffeine Consumption, Maria L. Mask, Bandar A. Alghamdi, Lauren G. Killen, James M. Green, Eric K. O'Neal, Hunter S. Waldman
Caffeinated Gum Does Not Influence Rpe-Regulated Cadence In Recreationally-Active, College Females Regardless Of Habitual Caffeine Consumption, Maria L. Mask, Bandar A. Alghamdi, Lauren G. Killen, James M. Green, Eric K. O'Neal, Hunter S. Waldman
International Journal of Exercise Science
International Journal of Exercise Science 14(2): 1375-1387, 2021. Caffeine (CAF) has been extensively studied for its ergogenic and analgesic effects during exercise. However, the majority of these studies have been conducted in male populations. This study investigated the effects of acute CAF chewing gum on self-selected exercise intensity during a rating of perceived exertion (RPE) production trial in active females (n = 16, 21.0 ± 2.8 y). Data were also analyzed based on habitual CAF consumption level. Participants completed a V̇O2peak trial, followed by a familiarization and two randomized, triple-blinded experimental RPE production trials on an arm ergometer …
Alterations In Glycemic Variability, Vascular Health, And Oxidative Stress Following A 12-Week Aerobic Exercise Intervention-A Pilot Study, Joshua R. Sparks, Mark A. Sarzynski, J. Mark Davis, Peter W. Grandjean, Xuewen Wang
Alterations In Glycemic Variability, Vascular Health, And Oxidative Stress Following A 12-Week Aerobic Exercise Intervention-A Pilot Study, Joshua R. Sparks, Mark A. Sarzynski, J. Mark Davis, Peter W. Grandjean, Xuewen Wang
International Journal of Exercise Science
International Journal of Exercise Science 14(3): 1334-1353, 2021. The state of being overweight or obese leads to an increased risk of development of cardiometabolic disease. Increases in glycemic variability have been associated with greater induction of oxidative stress and declined vascular health, which may be exacerbated by higher weight status and improved through exercise. The purpose of this study was to examine the impact of a twelve-week aerobic exercise intervention on continuous glucose monitor (CGM) assessed glucose concentrations and glycemic variability, and biomarkers of vascular health and oxidative stress in overweight or obese adults. Eight adults (Age = 48.9 ± …
Predictive Accuracy Of The Nelson Equation Via Bodpod Compared To Commonly Used Equations To Estimate Resting Metabolic Rate In Adults, Bryndan Lindsey, Daniel Shookster, Joel Martin, Nelson Cortes
Predictive Accuracy Of The Nelson Equation Via Bodpod Compared To Commonly Used Equations To Estimate Resting Metabolic Rate In Adults, Bryndan Lindsey, Daniel Shookster, Joel Martin, Nelson Cortes
International Journal of Exercise Science
International Journal of Exercise Science 14(2): 1166-1177, 2021. Indirect calorimetry (IC) is considered the gold standard for assessing resting metabolic rate (RMR). However, many people do not have access to IC devices and use prediction equations for RMR estimation. Equations using fat free mass (FFM) as a predictor have been developed to estimate RMR, as a strong relationship exists between FFM and RMR. One such equation is the Nelson equation which is used by the BodPod (BP). Yet, there is limited evidence whether the Nelson equation is superior to other common equations to predict RMR. To examine the agreement between …
Excess Post-Exercise Oxygen Consumption And Substrate Oxidation Following High-Intensity Interval Training: Effects Of Recovery Manipulation, Márcio Sindorf, Moisés Germano, Wellington Dias, Danilo Batista, Tiago Braz, Marlene Moreno, Charles Lopes
Excess Post-Exercise Oxygen Consumption And Substrate Oxidation Following High-Intensity Interval Training: Effects Of Recovery Manipulation, Márcio Sindorf, Moisés Germano, Wellington Dias, Danilo Batista, Tiago Braz, Marlene Moreno, Charles Lopes
International Journal of Exercise Science
International Journal of Exercise Science 14(2): 1151-1165, 2021. The recovery manipulation during high-intensity interval training (HIIT) may have the potential to modulate the responses of post-exercise energy metabolism. The purpose of this study was to investigate how the type (i.e., passive and active) and duration (i.e., short and long) of the recovery between the intervals in HIIT affect the excess post-exercise oxygen consumption (EPOC) and oxidation of fats and carbohydrates during the post-exercise recovery. Eight physically active men performed a maximal incremental test, to determine the peak oxygen consumption (O2peak) and the first ventilatory …
Epoc Comparison Between Resistance Training And High-Intensity Interval Training In Aerobically Fit Women, Beau Kjerulf Greer, Julie O'Brien, Lyndsey Hornbuckle, Lynn Panton
Epoc Comparison Between Resistance Training And High-Intensity Interval Training In Aerobically Fit Women, Beau Kjerulf Greer, Julie O'Brien, Lyndsey Hornbuckle, Lynn Panton
International Journal of Exercise Science
International Journal of Exercise Science 14(2): 1027-1035, 2021. Previous research has shown that various modes of exercise may elicit significant increases in resting metabolism for up to 24 hours post-exercise, but typically using untrained or moderately active subjects. The purpose of the present study was to compare excess post-exercise oxygen consumption (EPOC) between circuit-style resistance training (RT) and high-intensity interval training (HIIT) in young, aerobically fit women. During the follicular phase of the menstrual cycle, seven participants reported to the laboratory for evening and morning baseline resting metabolic rate (RMR) measurements via indirect calorimetry. Participants fasted and slept overnight in …
Beta-Alanine Supplementation For Four Weeks Increases Volume Index And Reduces Perceived Effort Of Resistance-Trained Men: A Pilot Study., Julio Benvenutti Bueno De Camargo, Felipe Brigatto, Rafael Zaroni, Moises Germano, Raphael Conceicao, Alexandre Martins, Marcelo Aoki, Tiago Braz, Charles Lopes
Beta-Alanine Supplementation For Four Weeks Increases Volume Index And Reduces Perceived Effort Of Resistance-Trained Men: A Pilot Study., Julio Benvenutti Bueno De Camargo, Felipe Brigatto, Rafael Zaroni, Moises Germano, Raphael Conceicao, Alexandre Martins, Marcelo Aoki, Tiago Braz, Charles Lopes
International Journal of Exercise Science
International Journal of Exercise Science 14(2): 994-1003, 2021. The aim of the present study was to assess the short-term effects of four weeks of beta-alanine supplementation (BA) (6.4 g/day) on the total volume performed and perceived effort of resistance-trained individuals. Sixteen trained men (age: 27.3 ± 5.0 years, height: 1.78 ± 0.1 cm, total body mass: 84.3 ± 8.4 kg, RT experience: 5.9 ± 3.3 years) were allocated in one of the following groups: BA or Placebo (PLA). In addition, during the same period, participants were submitted to a resistance training program. Volume index (VI) and the rate of perceived …
Leucine Supplementation Does Not Improve Muscle Recovery From Resistance Exercise In Young Adults: A Randomized, Double-Blinded, Crossover Study, Jeferson L. Jacinto, João Pedro Nunes, Alex S. Ribeiro, Juliano Casonato, Mirela C. Roveratti, Bruna N. S. Sena, Edilson S. Cyrino, Rubens A. Da Silva, Andreo F. Aguiar
Leucine Supplementation Does Not Improve Muscle Recovery From Resistance Exercise In Young Adults: A Randomized, Double-Blinded, Crossover Study, Jeferson L. Jacinto, João Pedro Nunes, Alex S. Ribeiro, Juliano Casonato, Mirela C. Roveratti, Bruna N. S. Sena, Edilson S. Cyrino, Rubens A. Da Silva, Andreo F. Aguiar
International Journal of Exercise Science
International Journal of Exercise Science 14(2): 486-497, 2021. This study aimed to investigate the effects of free leucine supplementation on muscle recovery from resistance exercise (RE) in young adults. Fourteen untrained subjects (23.9 ± 3.6 years old) underwent RE sessions (leg press and hack squat: three sets of 8-12 reps at 70% 1RM) supplemented with leucine (LEU: two daily doses of 3g) or a placebo (PLA), separated by a seven-day washout period. Following each occasion, participants were evaluated in three subsequent days (24h, 48h, and 72h) for muscle recovery via a repetition-to-failure test. The following markers were assessed: repetition performance, …
Effects Of Caffeine On Exercise Duration, Critical Velocity, And Ratings Of Perceived Exertion During Repeated-Sprint Exercise In Physically Active Men, Jesse A. Stein, Heath Gasier, Blake Goodman, Melitza Ramirez, Blanca Delatorre, Cassandra Beattie, Thomas J. Barstow, Katie Heinrich
Effects Of Caffeine On Exercise Duration, Critical Velocity, And Ratings Of Perceived Exertion During Repeated-Sprint Exercise In Physically Active Men, Jesse A. Stein, Heath Gasier, Blake Goodman, Melitza Ramirez, Blanca Delatorre, Cassandra Beattie, Thomas J. Barstow, Katie Heinrich
International Journal of Exercise Science
International Journal of Exercise Science 14(2): 435-445, 2021. Caffeine improves short-to-moderate distance running performance, but the effect of caffeine on repeated sprints are equivocal. This research determined if caffeine improved exercise tolerance during repeated-sprint exercise. iCV is a running velocity that distinguishes intermittent running velocities (velocities ≤ iCV) that are sustainable from those resulting in a predictable time to exhaustion (velocities > iCV). Seven physically active men (age = 21.6 ± 1.5 years, body mass = 72.8 ± 5.1 kg, VO2max = 56.9 ± 9.8 mL/kg/min) ingested caffeine (5 mg/kg) or placebo (crossover design) 60 min prior to an intermittent …
Dark Chocolate Supplementation Elevates Resting Energy Expenditure In Exercise Trained Females, Katie M. Presler, Michael Webster
Dark Chocolate Supplementation Elevates Resting Energy Expenditure In Exercise Trained Females, Katie M. Presler, Michael Webster
International Journal of Exercise Science
International Journal of Exercise Science 14(2): 250-259, 2021. Several recent reports have indicated positive health and exercise benefits of (-)-epicatechin-rich cocoa products. This study investigated the influence of dark chocolate (DC) supplementation on resting and steady state exercise metabolism in a group of athletically fit females. Using a randomized, single-blind design, 18 exercise trained female subjects were assigned to a 30-d supplementation with either 20g· d-1 of 70% DC (n = 9) or a calorically matched white chocolate (WC) (n = 9). Pre-supplementation (PRE), subjects underwent indirect calorimetry assessment for resting energy expenditure (REE) and exercise energy …
Acetic Acid Supplementation: Effect On Resting And Exercise Energy Expenditure And Substrate Utilization, Kolton M. Cobb, Domenico A. Chavez, Jonathan D. Kenyon, Zachary J. Hutelin, Michael Webster
Acetic Acid Supplementation: Effect On Resting And Exercise Energy Expenditure And Substrate Utilization, Kolton M. Cobb, Domenico A. Chavez, Jonathan D. Kenyon, Zachary J. Hutelin, Michael Webster
International Journal of Exercise Science
International Journal of Exercise Science 14(2): 222-229, 2021. The purpose of this study was to investigate the influence of acetic acid (apple cider vinegar; ACV) supplementation on resting and exercise energy expenditure and substrate utilization. Using a randomized, double blind, crossover design, 16 healthy subjects were supplemented for 4 d with either ACV (30-ml/d) mixed in 1 L of a non-nutritive lemon-flavored drink or a placebo (PLA). They were then assessed via indirect calorimetry for resting energy expenditure (REE) and substrate utilization. This was immediately followed by the assessment of steady state cycling exercise energy expenditure at 40 W (EEE-40) …
A Short-Term Paleolithic Dietary Intervention Does Not Alter Adipokines Linked To Adiposity, Rachel M. Graff, Kristofer Jennings, Natalie A. Davies, Andres E. Carrillo, Emily C. Lavoy, Edward J. Ryan, Melissa M. Markofski
A Short-Term Paleolithic Dietary Intervention Does Not Alter Adipokines Linked To Adiposity, Rachel M. Graff, Kristofer Jennings, Natalie A. Davies, Andres E. Carrillo, Emily C. Lavoy, Edward J. Ryan, Melissa M. Markofski
International Journal of Exercise Science
International Journal of Exercise Science 14(2): 113-122, 2021. The Paleolithic diet, characterized by an emphasis on hunter-gatherer type foods accompanied by an exclusion of grains, dairy products, and highly processed food items, is often promoted for weight loss and a reduction in cardiometabolic disease risk factors. Specific adipokines, such as adiponectin, omentin, nesfatin, and vaspin are reported to be dysregulated with obesity and may respond favorably to diet-induced fat loss. We aimed to evaluate the effects of an eight-week Paleolithic dietary intervention on circulating adiponectin, omentin, nesfatin, and vaspin in a cohort of physically inactive, but otherwise healthy adults. Methods: …
Acute Beet Juice Supplementation Does Not Improve 30- Or 60-Second Maximal Intensity Performance In Anaerobically Trained Athletes, Scott A. Conger, Clare M. Zamzow, Matthew E. Darnell
Acute Beet Juice Supplementation Does Not Improve 30- Or 60-Second Maximal Intensity Performance In Anaerobically Trained Athletes, Scott A. Conger, Clare M. Zamzow, Matthew E. Darnell
International Journal of Exercise Science
International Journal of Exercise Science 14(2): 60-75, 2021. Research suggests that beet juice is beneficial during aerobic exercise. However, the impact of beet juice during primarily anaerobic exercise is equivocal. The purpose of this study was to determine the effects of acute beet juice supplementation on maximal intensity performance during 30-s and 60-s maximal-intensity cycling sprints. Using a double-blind, crossover-study design, 14 anaerobically trained male hockey players completed six Wingate cycling tests: familiarization trials of a 30-s and 60-s Wingate test, followed by 30-s Wingate placebo/beet juice trials, and 60-s Wingate placebo/beet juice trials. Repeated measures ANOVAs were used to …
Effect Of Pre-Exercise Ice Slurry Ingestion On Physiological And Perceptual Measures In Athletes With Spinal Cord Injuries, Alexis Moore, Kelly Pritchett, Robert C. Pritchett, Elizabeth Broad
Effect Of Pre-Exercise Ice Slurry Ingestion On Physiological And Perceptual Measures In Athletes With Spinal Cord Injuries, Alexis Moore, Kelly Pritchett, Robert C. Pritchett, Elizabeth Broad
International Journal of Exercise Science
International Journal of Exercise Science 14(2): 19-32, 2021. Athletes with cervical level spinal cord injuries (SCI) have an impaired ability to thermoregulate during exercise, leading to an increased core temperature (Tcore) due to a decrease in sweat response. Elevated Tcore may result in premature onset of fatigue and decreased athletic performance. Therefore, precooling techniques that decrease Tcore before exercise may increase the storage capacity for metabolic heat production, thereby delaying the time before reaching a critically high Tcore. The purpose of this study was to investigate the effects of pre-exercise ice slurry ingestion …
No Changes In Appetite-Related Hormones Following Swimming And Cycling Exercise Interventions In Adults With Obesity, Brandon G. Fico, Mohammed Alkatan, Hirofumi Tanaka
No Changes In Appetite-Related Hormones Following Swimming And Cycling Exercise Interventions In Adults With Obesity, Brandon G. Fico, Mohammed Alkatan, Hirofumi Tanaka
International Journal of Exercise Science
International Journal of Exercise Science 13(2): 1819-1825, 2020. Swimming is a favorable and ideal modality of exercise for individuals with obesity and arthritis as it encompasses a minimal weight-bearing stress and a reduced heat load. However, the available evidence indicates that regular swimming may not be effective in reducing body weight and body fatness. A current hypothesis is that exercise in cold water stimulates appetite. We determined the effect of swimming training on appetite-related hormones. Thirty-nine adults with obesity and osteoarthritis were randomly assigned to 12 weeks of supervised swimming or cycling training. In the initial few weeks, participants exercised …
Metabolic Flexibility And Weight Status May Contribute To Inter-Individual Changes In Breastmilk Lipid Content In Response To An Acute Bout Of Exercise: Preliminary Findings From A Pilot Study, Jill M. Maples, Charlotte Mccarley, Maire M. Blankenship, Kristin Yoho, K.Paige Johnson, Kimberly B. Fortner, Rachel A. Tinius
Metabolic Flexibility And Weight Status May Contribute To Inter-Individual Changes In Breastmilk Lipid Content In Response To An Acute Bout Of Exercise: Preliminary Findings From A Pilot Study, Jill M. Maples, Charlotte Mccarley, Maire M. Blankenship, Kristin Yoho, K.Paige Johnson, Kimberly B. Fortner, Rachel A. Tinius
International Journal of Exercise Science
International Journal of Exercise Science 13(2): 1756-1769, 2020. The purposes of this pilot study were to describe changes in breastmilk lipid content in response to an acute bout of moderate intensity exercise and to explore maternal metabolic health factors, including metabolic flexibility, which may impact this change. A cross-sectional, observational, pilot study design was performed in 14 women between 4 and 6 months postpartum. Whole body fasting lipid oxidation was assessed, a standardized high-fat breakfast was consumed, and lipid oxidation was again measured 120-minutes post-meal. Metabolic flexibility was determined by comparing the change in lipid oxidation before and after the …