Fluid replacement remains an important strategy for preserving exercise performance as dehydration in excess of 2% of body weight consistently impairs aerobic exercise performance. Too much of a good thing, however, can have negative health consequences as persistent drinking in excess of sweating rate can induce symptomatic exercise associated hypontremia. This short review highlights new position stands and/or policy statements regarding fluid replacement for sport, evidence that laboratory findings translate to team sport performance, and current hydration practices of athletes. It is culminated with practical strategies for drinking appropriately during physical activity.
Military Nutrition Division, U.S. Army Research Institute of Environmental Medicine, Natick, MA
Address for correspondence: Scott J. Montain, Ph.D., FACSM, Military Nutrition Division, USARIEM, Bldg 42, Kansas St., Natick, MA 01746 (E-mail: firstname.lastname@example.org).