Author : J. Speakman
Publisher : Springer Science & Business Media
Page : 420 pages
File Size : 27,8 MB
Release : 1997-09-30
Category : Science
ISBN : 9780412637803
Divided into three parts, Doubly Labelled Water presents a clear and accessible account of this technique. Part One presents a general introduction to the study of animal energetics: Part Two discusses the theory behind use of doubled labellled water and Part Three evaluates the practical aspects of its use and the methodlologies required for its application.
Author : Patria A. Hume
Publisher : Springer
Page : 294 pages
File Size : 39,45 MB
Release : 2017-12-21
Category : Medical
ISBN : 9811054185
This book outlines best practice protocols for body composition analysis of high-performance athletes and provides guidance on the use of new technologies for anthropometry. While surface anthropometry has traditionally been used to assess body composition through the internationally recognised methodology of the International Society for the Advancement of Kinanthropometry (ISAK), the recent commercialisation of devices, such as bioelectrical impedance technologies, dual-energy X-ray absorptiometry (DXA), ultrasound, 3D photometry and air-displacement plethysmography (Bod Pod), has led to the non-standardised adoption of new measurement techniques. In this textbook, leading researchers detail standardisation procedures for each technology: in terms of athlete preparation, test protocols, test reporting, equipment calibration and data interpretation. Each chapter covers a different tool: how it works, what it is used to measure, and what the issues are surrounding its validity, practicality and reliability. This book provides an essential reference for device technicians and sport practitioners, ensuring that high-performance athletes are afforded accurate and comparable body composition information to guide their training routines.
Author : Klaas R. Westerterp
Publisher : Springer Science & Business Media
Page : 112 pages
File Size : 39,91 MB
Release : 2012-12-13
Category : Medical
ISBN : 3642346278
Energy balance can be maintained by adapting energy intake to changes in energy expenditure and vice versa, where short-term changes in energy expenditure are mainly caused by physical activity. Questions are whether physical activity is affected by over and under-eating, is intake affected by an increase or a decrease in physical activity, and does overweight affect physical activity? Presented evidence is largely based on studies where physical activity is quantified with doubly labeled water. Overeating does not affect physical activity while under-eating decreases habitual or voluntary physical activity. Thus, it is easier to gain weight than to lose weight. An exercise induced increase in energy requirement is compensated by intake while a change to a more sedentary routine does not induce an equivalent reduction of intake and generally results in weight gain. Overweight and obese subjects have similar activity energy expenditures than lean people despite they move less. There are two options to reverse the general population trend for an increasing body weight, reducing intake or increasing physical activity. Based on the results presented, eating less is most effective for preventing weight gain, despite a potential negative effect on physical activity when reaching a negative energy balance.
Author : Institute of Medicine
Publisher : National Academies Press
Page : 639 pages
File Size : 46,45 MB
Release : 2005-06-18
Category : Medical
ISBN : 0309091586
Dietary Reference Intakes for Water, Potassium, Sodium, Chloride, and Sulfate The Dietary Reference Intakes (DRIs) are quantitative estimates of nutrient intakes to be used for planning and assessing diets for healthy people. This new report, the sixth in a series of reports presenting dietary reference values for the intakes of nutrients by Americans and Canadians, establishes nutrient recommendations on water, potassium, and salt for health maintenance and the reduction of chronic disease risk. Dietary Reference Intakes for Water, Potassium, Sodium, Chloride, and Sulfate discusses in detail the role of water, potassium, salt, chloride, and sulfate in human physiology and health. The major findings in this book include the establishment of Adequate Intakes for total water (drinking water, beverages, and food), potassium, sodium, and chloride and the establishment of Tolerable Upper Intake levels for sodium and chloride. The book makes research recommendations for information needed to advance the understanding of human requirements for water and electrolytes, as well as adverse effects associated with the intake of excessive amounts of water, sodium, chloride, potassium, and sulfate. This book will be an invaluable reference for nutritionists, nutrition researchers, and food manufacturers.
Author : P.W. Rundel
Publisher : Springer Science & Business Media
Page : 536 pages
File Size : 40,75 MB
Release : 2012-12-06
Category : Science
ISBN : 1461234980
The analysis of stable isotope ratios represents one of the most exciting new technical advances in environmental sciences. In this book, leading experts offer the first survey of applications of stable isotope analysis to ecological research. Central topics are - plant physiology studies - food webs and animal metabolism - biogeochemical fluxes. Extensive coverage is given to natural isotopes of carbon, hydrogen, oxygen, nitrogen, sulfur, and strontium in both terrestrial and marine ecosystems. Ecologists of diverse research interests, as well as agronomists, anthropologists, and geochemists will value this overview for its wealth of information on theoretical background, experimental approaches, and technical design of studies utilizing stable isotope ratios.
Author : Joan Webster-Gandy
Publisher : Oxford University Press, USA
Page : 842 pages
File Size : 21,93 MB
Release : 2012
Category : Medical
ISBN : 0199585822
Fully updated, the Oxford Handbook of Nutrition and Dietetics, second edition is a practical quick-reference guide to nutrition in the prevention and treatment of disease and the maintenance of good health.
Author : Anthony C. Hackney
Publisher : Elsevier
Page : 137 pages
File Size : 41,60 MB
Release : 2016-03-14
Category : Science
ISBN : 0128096918
A new volume in the Emerging Issues in Analytical Chemistry series, Exercise, Sport, and Bioanalytical Chemistry: Principles and Practice focuses on the basic and applied aspects of energy metabolism in humans. Concise and scientific, yet intelligible to the nonscientist, the book consists of two parts. Part I, Introduction: Basics and Background, provides the biochemistry necessary to understand the rest of the book and describes analytical processes and results as an aid to grasping the science. Part II, Applications: Knowledge into Practice, explores measurement techniques for metabolism, energy expenditure of various activities, techniques that enhance expenditure, metabolic adaptation, foods and drugs that enhance expenditure, and the role of bioanalytical chemistry in future research in exercise and sport. Discussion of the benefits of exercise and practices for improving the capacity to perform exercise is illustrated by many useful and entertaining examples. This volume allows readers to come away with a grasp of the scientific concepts, how they are manifested in research techniques, and how the results of research can be applied in the real world of public health and personal development. The Emerging Issues in Analytical Chemistry series is published in partnership with RTI International and edited by Brian F. Thomas. Please be sure to check out our other featured volumes: - Thomas, Brian F. and ElSohly, Mahmoud. The Analytical Chemistry of Cannabis: Quality Assessment, Assurance, and Regulation of Medicinal Marijuana and Cannabinoid Preparations, 9780128046463, December 2015. - Tanna, Sangeeta and Lawson, Graham. Analytical Chemistry for Assessing Medication Adherence, 9780128054635, April 2016. - Rao, Vikram, Knight, Rob, and Stoner, Brian. Sustainable Shale Oil and Gas: Analytical Chemistry, Biochemistry, and Geochemistry Methods, 9780128103890, forthcoming September 2016. - Farsalinos, Konstantinos, et al. Analytical Assessment of e-Cigarettes: From Contents to Chemical and Particle Exposure Profiles, 9780128112410, forthcoming November 2016. - Provides readers with the fundamental biochemistry and some elements of the physiology behind physical activity/exercise and describes the analytical techniques used to elucidate the science - Written in clear, concise, compelling prose that is neither simplistic to scientists nor too sophisticated for a large, diverse global audience - A one-page Close-Up in each chapter illustrates key topics to catch, engage, entertain, and create a novel synthesis of thought
Author : John R. B. Lighton
Publisher : Oxford University Press, USA
Page : 285 pages
File Size : 12,84 MB
Release : 2018-12-24
Category : Science
ISBN : 0198830394
This is the only authoritative textbook on metabolic measurement of animals, ranging in mass from fruit flies to whales. It integrates a rigorous theoretical background with detailed practical guidelines for making actual measurements in the field and laboratory.
Author : Dale A. Schoeller
Publisher : CRC Press
Page : 700 pages
File Size : 10,87 MB
Release : 2017-08-15
Category : Medical
ISBN : 1351648322
Diet is a major factor in health and disease. Controlled, long-term studies in humans are impractical, and investigators have utilized long-term epidemiological investigations to study the contributions of diet to the human condition. Such studies, while valuable, have often been limited by contradictory findings; a limitation secondary to systematic errors in traditional self-reported dietary assessment tools that limit the percentage of variances in diseases explained by diet. New approaches are available to help overcome these limitations, and Advances in the Assessment of Dietary Intake is focused on these advances in an effort to provide more accurate dietary data to understand human health. Chapters cover the benefits and limitations of traditional self-report tools; strategies for improving the validity of dietary recall and food recording methods; objective methods to assess food and nutrient intake; assessment of timing and meal patterns using glucose sensors; and physical activity patterns using validated accelerometers. Advances in the Assessment of Dietary Intake describes new avenues to investigate the role of diet in human health and serves as the most up-to-date reference and teaching tool for these methods that will improve the accuracy of dietary assessment and lay the ground work for future studies.
Author : Herman Pontzer PhD
Publisher : Penguin
Page : 385 pages
File Size : 28,37 MB
Release : 2022-04-19
Category : Health & Fitness
ISBN : 0593421043
One of the foremost researchers in human metabolism reveals surprising new science behind food and exercise. We burn 2,000 calories a day. And if we exercise and cut carbs, we'll lose more weight. Right? Wrong. In this paradigm-shifting book, Herman Pontzer reveals for the first time how human metabolism really works so that we can finally manage our weight and improve our health. Pontzer's groundbreaking studies with hunter-gatherer tribes show how exercise doesn't increase our metabolism. Instead, we burn calories within a very narrow range: nearly 3,000 calories per day, no matter our activity level. This was a brilliant evolutionary strategy to survive in times of famine. Now it seems to doom us to obesity. The good news is we can lose weight, but we need to cut calories. Refuting such weight-loss hype as paleo, keto, anti-gluten, anti-grain, and even vegan, Pontzer discusses how all diets succeed or fail: For shedding pounds, a calorie is a calorie. At the same time, we must exercise to keep our body systems and signals functioning optimally, even if it won't make us thinner. Hunter-gatherers like the Hadza move about five hours a day and remain remarkably healthy into old age. But elite athletes can push the body too far, burning calories faster than their bodies can take them in. It may be that the most spectacular athletic feats are the result not just of great training, but of an astonishingly efficient digestive system. Revealing, irreverent, and always entertaining, Pontzer has written a book that will change how you eat, move, and live.
