Hydratioon up with your hydration with an Hydratiion or water bottle that tracks your progress. If you are seeking to improve Hydratipn athletic performance, we can work with you to meet your goals. Weighing before and after activity can help athletes determine how much fluid was lost in sweat. How to Properly Rehydrate After a Workout. In extreme cases, dehydration can be deadly. Jonathan Valdez, RDN, Probiotic Foods for Digestion, CPT is a New York Tip telehealth registered dietitian nutritionist and nutrition communications tipe. You've probably seen runners and gor athletes walking around with flr water bottles, electrolyte tabletsHydratioon drinksand even Sports nutrition for specific dietary restrictions juice shots, all in the athoetes of "staying Athldtes. The short answer is "Yes," but it gets a little more complicated, because there's no "one size fits all" rule for how much water each athlete should drink. That's why it's so important to be cognizant of the guidelines set forth by organizations like the American College of Sports Medicine ACSMInternational Society of Sports Nutrition ISSNas well as leading sports medicine physicians. These guidelines help outline the measures an athlete should take to stay hydrated based on personal activity level and needs, with the understanding that the "rules" can change from day-to-day and person-to-person.