This product is free for SHPN members.
This webinar was presented live on May 17, 2022.
Fluid balance and electrolyte balance are inextricably linked, with normal hydration (euhydration) dependent upon the maintenance of the amounts and the distribution of intracellular and extracellular electrolytes. Hypohydration and hyperhydration are common examples of disruptions in fluid-and-electrolyte balance that are rectified only with the replacement of lost (or excess) fluid and electrolytes. Water-and-salt balance is maintained by single- and double-negative-feedback loops that govern thirst and kidney function, with electrolytes such as potassium, calcium, phosphorus, and magnesium playing an important role in intracellular fluid-electrolyte balance. This presentation will review important scientific and practical aspects of fluid-electrolyte balance, with special reference to the positive hydration characteristics associated with the electrolyte profile of cow's milk.
Sponsored by GoodSport®
CPE Level: 2
- Describe the role of intra- and extracellular electrolytes in maintaining euhydration and list at least two examples of each category of electrolytes.
- Explain how disruptions in fluid-electrolyte balance affect key physiological functions that influence physical and mental performance.
- Discuss why the electrolytes in cow’s milk are associated with superior hydration/rehydration responses.
Bob Murray, PhD, FACSM
Bob Murray, PhD, FACSM is managing principal of Sports Science Insights, LLC, a consulting firm that assists companies and organizations in need of targeted expertise in exercise science and sports nutrition. SSI's clients range from start-ups to larger companies such as Nike, Coca-Cola, Clif Bar, Dogfish Head Brewery, Petco, Gryphon Investors, and Aegis Sciences Corporation.
Prior to starting SSI in August 2008, Dr. Murray was co-founder and director of the Gatorade Sports Science Institute (1985 to 2008). Dr. Murray's research and publications on the hydration needs of athletes and the physiological and performance responses to fluid, carbohydrate, and electrolyte ingestion have contributed to the broader understanding of the importance of being well hydrated during exercise and of the role that carbohydrates and electrolytes play in helping athletes and non-athletes alike get the most out of their bodies during physical activity.
Before joining The Gatorade Company, Dr. Murray served on the faculties of Boise State University (1980-1985; Associate Professor), Ohio State University (1979-1980; Lecturer), and Oswego State University (1974-1977; Assistant Professor and Men's Swimming & Diving Coach).
Bob received his PhD in exercise physiology from Ohio State University, is a Fellow of the American College of Sports Medicine, and an honorary member of the Academy of Nutrition and Dietetics. Bob and his wife, Linda, reside in Crystal Lake, IL, 55 miles northwest of Chicago.
In addition to authoring numerous articles in peer-reviewed scientific journals, Bob has coauthored three books: Sports Drinks: Science and Practice (2000), Practical Guide to Exercise Physiology (2016, 2020), and Food and Fitness After 50 (2018).
Dr. Larry Kenney
Dr. Larry Kenney is the Marie Underhill Noll Chair in Human Performance and Professor of Physiology and Kinesiology at the Pennsylvania State University. Dr. Kenney was awarded the prestigious Faculty Scholar Medal by Penn State for his research contributions and has published 2 books, more than 230 journal articles, and dozens of book chapters on the topic of human responses to exercise, heat and cold stress, and dehydration as well as the biophysics of heat exchange between humans and the environment. His research was continuously funded by NIH from 1986 through 2015, one of the longest-running R01 grants, and he continues to be funded by that organization. He has mentored 38 M.S. or Ph.D. students throughout his career along with 8 postdoctoral fellows and numerous undergraduate scholars.
Dr. Kenney is the primary author of Physiology of Sport and Exercise, a best-selling textbook in exercise physiology now in its 7th edition; it has now been translated into 13 languages. He served as President of the American College of Sports Medicine from 2003-04 and received the Honor Award from that organization in 2022. He is also a Fellow of the American Physiological Society and was presented with the Adolph Distinguished Lectureship Award by APS in 2017. He was the former chair of the Gatorade Sports Science Institute and serves on many scientific advisory panels including Nike's Science Advisory Board.