Download or read book The Effects of Quercetin on Cycling Time Trial Performance written by Douglas Van Pelt and published by . This book was released on 2012 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt: Quercetin is a flavonoid found in commonly consumed fruits and vegetables that has exhibited powerful antioxidant and anti-inflammatory properties in rodents and in vitro. In humans, the ergogenic effects of antioxidant supplementation on exercise performance and adaptations are still equivocal and need to be further investigated. A powerful antioxidant such as quercetin may inhibit the high levels of oxidative stress associated with the high volume and intensity of exercise training seen with trained individuals. There have been equivocal findings thus far regarding the ergogenic effect of either acute or chronic supplementation of quercetin on exercise performance. PURPOSE: To determine the effect of 28 days of daily quercetin supplementation on cycling time trial performance and the associated exercise performance variables. METHODS: Thirteen trained cyclists (VO2peak 58.8 ± 3.9 ml/kg/min) were recruited for this study from the University of Texas at Austin and the local Austin, Texas community and participated in this placebo controlled, randomized, crossover designed study. After initial assessment of baseline data (VO2peak, lactate threshold, and two familiarization time trials), participants began daily supplementation of either an antioxidant supplement containing vitamins and quercetin (Q-VIT: 1000mg quercetin, 820mg Vitamin C, 40mg Vitamin B3) or the same vitamin supplement without quercetin (VIT: 820mg Vitamin C, 40mg Vitamin B3). A simulated time trial using an electromagnetically braked cycle ergometer in which subjects had to complete a set amount of work (kJ) as fast as possible was performed on the last day of supplementation. Measured performance variables included: time to completion, average power output, average oxygen consumption (VO2), Respiratory Exchange Ratio (RER), gross mechanical efficiency (GE), heart rate (HR), and rating of perceived exertion (RPE). RESULTS: Quercetin had no effect on HR, RER, power output, or RPE. There was also no difference in time to complete the time trial between treatments. However, an approximately ~2% higher, but not significantly different, VO2 during Q-VIT supplementation significantly lowered the GE compared to VIT (Q-VIT: 20.49 ± 0.26 % and 19.94 ± 0.33 %; VIT: 20.9 ± 0.24 % and 20.37 ± 0.33 %; p

Download or read book The Effect of Quercetin on Exercise Induced Cytokine Response in Trained Cyclists written by Ting-Heng Chou and published by . This book was released on 2012 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt: Quercetin is a flavonoid found in commonly consumed fruits and vegetables that has exhibited powerful antioxidant and anti-inflammatory properties in rodents and in vitro. In humans, the effect of quercetin on exercise induced oxidative stress and inflammation is still equivocal and need to be further investigated. A powerful antioxidant such as quercetin may inhibit the high levels of oxidative stress and inflammation associated with the high volume and intensity of exercise training seen with endurance-trained individuals. PURPOSE: To determine the effect of 28 days of daily quercetin supplementation on intensive endurance exercise induced cytokine response. METHODS: Thirteen trained cyclists (VO2peak 58.8 ± 3.9 ml/kg/min) were recruited for this study from the University of Texas at Austin and the local Austin, Texas community and participated in this placebo controlled, randomized, crossover designed study. After initial assessment of baseline data (VO2peak, lactate threshold, and two familiarization time trials), participants began daily supplementation with either an antioxidant supplement containing vitamins and quercetin (Q-VIT: 1000mg quercetin, 820mg Vitamin C, 40mg Vitamin B3) or the same vitamin supplement without quercetin (VIT: 820mg Vitamin C, 40mg Vitamin B3). A simulated time trial using an electromagnetically braked cycle ergometer in which subjects had to complete a set amount of work (kJ) as fast as possible was performed on the last day of supplementation. Blood collection was performed at three time points of the time trial days: before exercise (PRE), after warm up (MIN 20), and immediately after time trial exercise (POST). Measured plasma markers were Interleukin-6 (IL-6), C-Reactive Protein (CRP), and Interleukin-10 (IL-10). RESULTS: Q-VIT compared to VIT had no effect on pre, min 20 and post exercise plasma IL-6, CRP, and IL-10 (P= 0.7, 0.08, and 0.32 respectively). However there was a trend that Q-VIT lowered plasma CRP compare to VIT (P = 0.08). CONCLUSION: Chronic supplementation for 28 days with a quercetin based antioxidant supplement did not affect plasma cytokine before during or after exercise. The results of the current study suggest that chronic supplementation with quercetin does not influence plasma cytokine and exercise induced cytokine response in endurance-trained athletes.

Download or read book Nutrient Timing written by Chad M. Kerksick and published by CRC Press. This book was released on 2011-10-20 with total page 366 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sports nutrition has evolved beyond what to eat and how much to eat to now include the question of when to eat. A hot topic in sports nutrition, nutrient timing is a dietary concept that takes into account time as a missing dimension in athletic performance and recovery. Not only is the consumption of nutrients in ideal amounts and proportions important, but the timing with which they are administered is also of prime importance—the right nutrients at the ideal time to affect performance and muscular growth. Nutrient Timing: Metabolic Optimization for Health, Performance, and Recovery presents the most authoritative text to date that scientifically examines the contemporary topic of nutrient timing. Worldwide research continues to rapidly explore the metabolic impact of nutrient timing and how its proper application may help to improve performance. With contributions from scientists and practitioners in the field, this book gathers the latest evidence-based information on this cutting-edge area. The chapters cover macronutrients—carbohydrates, proteins, and lipids—and their role in sporting activity, as well as an examination of vitamins and minerals. The core of the book focuses on pre-exercise, mid-exercise, and post-exercise considerations for both resistance and aerobically mediated activity. Using the models presented, individuals may improve performance, promote optimal adaptations to training, maximize recovery, and facilitate healthy interactions with their environment. The final chapters of the book describe future concepts in nutrient timing, including the impact of protein source in the context of timing, how nutrient timing can fit in with a comprehensive recovery program, and the application of the ideas discussed in unique populations such as the aged, the military, and populations interested in weight loss. This text provides solid data from the scientists themselves, giving researchers, teachers, coaches, and medical and health care professionals the necessary information they need to accurately and effectively determine how nutrients can impact certain outcomes and, most importantly, how to practically apply this knowledge.

Download or read book Phytochemicals written by Colleen Carkeet and published by CRC Press. This book was released on 2012-09-20 with total page 273 pages. Available in PDF, EPUB and Kindle. Book excerpt: Increasing knowledge of the various protective effects of phytochemicals has sparked interest in further understanding their role in human health. Phytochemicals: Health Promotion and Therapeutic Potential is the seventh in a series representing the emerging science with respect to plant-based chemicals. Drawn from the proceedings at the Seventh International Phytochemical Conference, Phytochemicals: Health Promotion and Therapeutic Potential, the book contains chapters written by conference presenters along with those of additional invited authors whose research focuses on the biological activities and clinical outcomes associated with phytochemical consumption. The book begins with a discussion of major research that has contributed to the widespread interest in phytochemicals and health promotion. This is followed by an exploration of the beneficial effects of polyphenols in healthy aging and against a host of illnesses and disorders, including cancer, cardiovascular disease, inflammation, and ulcers. The contributors also examine various aspects of phytochemicals related to bone and brain health, obesity, and metabolic disease. The book concludes by presenting methodologies for assessing the bioavailability of carotenoids and offers additional insight into Momordica cochichinensis Spreng, a fruit not commonly known in the Western world and a rich source of lycopene and beta-carotene. While promising advancements have been made in this field, opportunities for progress still exist concerning bioavailability, efficacy, genomics, and synergistic mechanisms. This book is destined to stimulate increased interest in research regarding these compounds, their biological activities, and the application of these findings to therapeutic alternatives.

Download or read book Antioxidants in Sport Nutrition written by Manfred Lamprecht and published by CRC Press. This book was released on 2014-09-17 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt: The use of antioxidants in sports is controversial due to existing evidence that they both support and hinder athletic performance. Antioxidants in Sport Nutrition covers antioxidant use in the athlete ́s basic nutrition and discusses the controversies surrounding the usefulness of antioxidant supplementation. The book also stresses how antioxidants may affect immunity, health, and exercise performance. The book contains scientifically based chapters explaining the basic mechanisms of exercise-induced oxidative damage. Also covered are methodological approaches to assess the effectiveness of antioxidant treatment. Biomarkers are discussed as a method to estimate the bioefficacy of dietary/supplemental antioxidants in sports. This book is useful for sport nutrition scientists, physicians, exercise physiologists, product developers, sport practitioners, coaches, top athletes, and recreational athletes. In it, they will find objective information and practical guidance.

Download or read book Dietary Supplementation in Sport and Exercise written by Jay R Hoffman and published by Routledge. This book was released on 2019-06-07 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dietary Supplementation in Sport and Exercise removes the myths associated with many dietary supplements. It provides an evidence-based approach to the physiological mechanisms related to popular supplements and examines the ergogenic benefits in both competitive and recreational athletes. This text covers a variety of supplements, including vitamins and minerals, carbohydrates, protein and amino acids, beta-alanine, creatine and guanidinoacetic acid, caffeine and probiotics, as well as emerging ergogenic aids. Information on dosage, ceiling effects and washout periods is discussed, along with safety and legality for different sporting organizations. The book also offers an insight into the efficacy of certain dietary supplements in unique populations, like children and the elderly. Dietary Supplementation in Sport and Exercise is an important resource for advanced undergraduate and graduate students on exercise science, health and nutrition courses, as well as strength coaches, athletic trainers, nutritionists and personal trainers, and medical professionals who consult with patients on dietary supplementation.

Download or read book Nutritional and Physical Activity Strategies to Boost Immunity Antioxidant Status and Health Volume III written by Mallikarjuna Korivi and published by Frontiers Media SA. This book was released on 2023-05-16 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Misled Athlete written by Carl Germano RD CNS CDN and published by iUniverse. This book was released on 2011-05-13 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: FOR DECADES, ATHLETES HAVE BEEN A TARGET for companies selling everything from banned substances to several worthless nutritional products with the hope they will make the di?erence between winning and losing. At the expense of being misled, athletes have su?ered irreparable damage from steroids and hormones as well as the side e?ects experienced from stimulants and tainted dietary supplements. In addition, the tremendous stress of strenuous exercise and its contribution to oxidative stress, in?ammation, fatigue, muscle damage and transient immune suppression sets the stage for viewing the athlete in a very di?erent way. In THE MISLED ATHLETE, renowned nutritionist Carl Germano, RD, CNS, CDN and his team present a new look at the athlete as a patient and provide a comprehensive plan for addressing the multiple nutritional needs of the athlete beyond excess protein, stimulants and steroids. Germano discusses the link between the stressor of exercise and the importance of proper recovery through diet manipulation, e?ective training techniques, and the use of legitimate nutritional supplements. THE MISLED ATHLETE gives insight into how the foods athletes eat, which training techniques they use, and how the consumption of certain safe nutritional supplements can successfully address the ravages of intense activity, assist the athlete to recuperate better and help prepare for the next battle.

Download or read book Sports Nutrition Performance Enhancing Supplements written by Abbie E. Smith-Ryan, Ph.D. and published by Linus Learning. This book was released on 2009 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Which of the following will yield the fastest measurable change in performance and/or body composition? (A) changes in training. (B) changes in diet. (C) use of sports supplements. (D) they all work equally well. If you answered 'C,' go to the head of the class. That's right; the proper use of sports supplements can produce changes in minutes (e.g. caffeine), days (e.g. creatine) and weeks (e.g. beta-alanine). Yet we are bombarded by muddled thinking from the mainstream media telling us that 'creatine causes cramps,' 'high protein diets are bad for your kidneys,' 'supplements aren't needed as long as you eat a balanced diet' and other ideas that are void of data. Sports Nutrition & Performance Enhancing Supplements (eds. Abbie Smith-Ryan PhD CSCS*D CISSN and Jose Antonio PhD FNSCA FISSN. Linus Publications) is a focused resource that will give you the latest sports nutrition science, and eradicate the intellectually lazy positions held so dearly by the anti-supplement crowd."--Amazon.

Download or read book Advanced Sports Nutrition written by Dan Benardot and published by Human Kinetics Publishers. This book was released on 2021 with total page 529 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advanced Sports Nutrition, Third Edition, offers research-based nutrition guidance for the athlete. It covers nutrition sources, fueling strategies for optimal performance, factors affecting nutrition needs, and plans for athletes in power, endurance, and combined power and endurance sports.

Download or read book Sports Nutrition written by Ronald J. Maughan and published by John Wiley & Sons. This book was released on 2013-09-24 with total page 980 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is well understood that proper nutrition has a significant impact on sports performance. All of the essential nutrients must be supplied in the right amounts and at the right times for an athlete to achieve optimal health and performance. In addition, when devising eating strategies that will help athletes meet their goals, sports nutritionists must take account of personal preferences, social and cultural issues, and a whole range of other factors. This latest volume in the Encyclopaedia of Sports Medicine series, published by Wiley in partnership with the Medical Commission of the International Olympic Committee, Sports Nutrition covers this dynamic field in unparalleled depth and breadth, from the scientific underpinnings of nutritional science to the development of practical nutritional programs for athletes in a range of sports. Written and edited by the world’s leading authorities on nutrition in sports, this timely new reference: Provides comprehensive coverage of nutrition for both individual and team sports Presents current knowledge of macronutrients, micronutrients, and dietary supplements for the athlete, outlining both benefits and risks Offers clear guidance on the unique nutritional needs of special populations of athletes, such as vegetarian athletes, young athletes and aging athletes Includes chapters on the clinical nutritional needs of diabetic athletes and athletes with weight management issues Carries the full endorsement of the IOC Medical Commission

Download or read book Use of Dietary Supplements by Military Personnel written by Institute of Medicine and published by National Academies Press. This book was released on 2008-12-01 with total page 474 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dietary supplements are widely available through a rapidly expanding market of products commonly advertised as beneficial for health, performance enhancement, and disease prevention. Given the importance and frequent evaluation of physical performance and health as a criteria to join and remain in the military, the use of these products by military personnel has raised concern regarding over-all and long-term efficacy and safety. This evaluation is especially difficult, as many of these supplements contain multiple ingredients, have a changing composition over time, or are used intermittently at doses difficult to measure. This book analyzes the patterns of dietary supplement use among military personnel, examines published reviews of the scientific evidence, and identifies those dietary supplements that are beneficial and/or warrant concern due to risks to health or performance. The book also recommends a system to monitor adverse health effects and a framework to identify the need for active management of dietary supplements by military personnel. Military policy makers, personnel, and recruits will find this book useful, as will nutritionists, athletes, and others working in strenuous environments.

Download or read book Nutrition and Supplements in Cycling written by Lewis A. Gough and published by Taylor & Francis. This book was released on 2024-06-18 with total page 349 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nutrition and Supplements in Cycling provides a blueprint for all the key nutritional aspects a cyclist should consider from health to macro- and micro-nutrients, and the finer details, such as sports supplements to improve competitive performance. As a result, cyclists and coaches can use this book as a handbook to help with supporting their own (or their athletes') health and performance through evidence-based nutrition. The nutritional demands of cycling are as diverse as the number of disciplines in the sport. To address this issue, this book covers the nutritional strategies for short- and long-distance disciplines and considers the implications of training and racing in a variety of environmental conditions. The book is divided into two distinct parts that are structured around the nutrition demands and practices of cyclists and an evaluation of novel and existing supplements that are currently being used or considered by riders. This book represents a go-to resource for cyclists, performance nutritionists, coaches, and students looking for the most effective and up-to-date evidence-based nutritional strategies for enhancing cycling performance. It brings together a team of emerging and world-leading academics, along with practitioners and riders from the UCI World and Pro Tours, to provide insightful evaluations of the latest science and to translate that knowledge into practical recommendations. Finally, it presents a model of reflective practice designed to enhance the performance nutrition practitioner’s development and practices. This book is key reading for active cyclists, cycling coaches, and athletes, as well as researchers and students of sport and exercise science, nutrition, human performance, and exercise physiology.

Download or read book Physiological Aspects of Sport Training and Performance 2nd Edition written by Hoffman, Jay and published by Human Kinetics. This book was released on 2014-03-07 with total page 520 pages. Available in PDF, EPUB and Kindle. Book excerpt: This text contains an in-depth discussion of physiological adaptation to exercise with a goal of providing practical applications to facilitate exercise prescriptions for a variety of athletes.

Download or read book Acute Topics in Sport Nutrition written by M. Lamprecht and published by Karger Medical and Scientific Publishers. This book was released on 2012-10-17 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt: In high-performance sport an optimal diet and nutritional interventions can make the difference between victory and defeat. In recent years, sport nutrition research has increased. This publication provides scientifically-based information with regard to the bioefficacy of trendy sport supplements and dietary approaches off the mainstream. International experts in the specific fields inform and clarify under which circumstances the application of certain supplements and nutritional interventions would be beneficial, either for the performance or health of the athletes. A broad spectrum of recent topics in sport nutrition is provided: selected sport supplements aside of mainstream, nutritional interventions and athlete‘s health, hydration and fluid balance and current aspects in exercise and exercise recovery. Finally, the publication concludes with recent information about the risk of supplementation and inadvertent doping. The book will be of benefit to sport physicians and scientists, nutritionists, coaches and athletes, as well as to the sport nutrition trade and related industries.

Download or read book Extreme and Rare Sports Performance Demands Drivers Functional Foods and Nutrition written by Sourya Datta and published by CRC Press. This book was released on 2019-05-13 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt: Two crucial components of a healthy life are nutrition and exercise. The importance of appropriate diet, food and nutrition are extremely important to be successful in sports, and, especially, in extreme sports. Extreme sport is an activity where a participant must demonstrate both mental and physical skills. This type of activity provides an adrenaline rush to individuals who are part of the "community of extreme sportsmen." Extreme sports provide opportunity for individuals to be active and fit with added enjoyment of partaking in a fun activity. Extreme sports in conjunction with proper nutrition helps to boost immunity and resistance against common infections. Studies have also exhibited that sports and exercise activities help in managing effective work-life balance as well. Extreme and Rare Sports: Performance Demands, Drivers, Functional Foods, and Nutrition provides a comprehensive treatise on extreme sports emphasizing the importance of nutrition and research-driven nutraceutical supplements in injury prevention and treatment. The book presents information on the nutritional requirements of sports activities on land, in water, or with high altitude-base. It covers a wide variety of definitions, philosophies, thoughts and practices involved with structurally diverse extreme sports. Features: Discusses specific food and nutritional requirements in extreme sports Provides information on the importance of functional foods, nutrition and structurally diverse phytonutrients for different sports Features information on Olympic and diverse extreme sports Details the importance of hydration and use of gelatin; skeletal muscle damage and recovery from eccentric contractions; and information on dietary supplements and antioxidants Presents analysis on growth, marketing, techniques, and future of extreme sports

Download or read book Nutritional Supplements in Sport Exercise and Health written by Linda M. Castell and published by Routledge. This book was released on 2015-04-17 with total page 515 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nutritional Supplements in Sport, Exercise and Health is the most up-to-date and authoritative guide to dietary supplements, ergogenic aids and sports nutrition foods currently available. Consisting of over 140 evidence-based review articles written by world-leading research scientists and practitioners, the book aims to dispel the misinformation that surrounds supplements and supplementation, offering a useful, balanced and unbiased resource. The reviews are set out in an A-Z format and include: definitions alongside related products; applicable food sources; where appropriate, practical recommendations such as dosage and timing, possible nutrient interactions requiring the avoidance of other nutrients, and any known potential side effects; and full research citations. The volume as a whole addresses the key issues of efficacy, safety, legality and ethics, and includes additional reviews on the WADA code, inadvertent doping, and stacking. Combining the most up-to-date scientific evidence with consideration of practical issues, this book is an essential reference for any healthcare professional working in sport and exercise, any student or researcher working in sport and exercise science, sports medicine, health science or nutrition, and for all coaches and support teams working with athletes.