Three physiologists tell us why the prescription "drink when you are thirsty" is usually the best guideline for deciding when and how much to drink. We will talk toHeinz Valtin of Dartmouth Medical School (retired);Mark Knepper, the chief of the Laboratory of Kidney& Electrolyte Metabolism of the National Heart Lung and Blood Institute; andSamuel Cheuvront, of the Thermal and Mountain Medicine Division of the U.S. Army Research Institute of Environmental Medicine about water consumption. They will answer the question: "Must I drink 64 ounces of water each day?" (Begins at 3:47) To read the review of the eight-by-eight rule by Heinz Valtin, clickhere: In theBuzz in Physiology, we look at studies involving a prosthetic device known as the Cheetah Flex Foot and whether it gives arunner who is a bilateral amputee an unfair advantage over limb-intact runners. We also summarize a study in mice in which adult bone marrow stem cells were used as anon-invasive therapy to repair cardiac tissue. And finally, we'll look at a study that finds that electro-acupuncture successfully reduced sympathetic nerve activity, normalized menstrual cycles and reduced testosterone in women withpolycystic ovarian syndrome. (Begins at 1:05)
Life Lines is a general interest science podcast of The American Physiological Society dedicated to conveying the "phizz" in physiology. Physiology is the study of how the body works, from all the body's major systems and functions to the molecules and cells that work in such remarkable ways to keep us healthy. Each episode includes three segments: - An interview with the author of a recent physiological study - An answer to a question about how the body works - A feature interview with a physiologist about his or her work If you would like a summary of the recent physiological studies featured on the program, please visit www.lifelines.tv. To ask Life Lines a question about physiology please skype "Physcast" or call 301-637-5634.