Introduction
Fluid deficits, thirst
FLUID RETENTION
Ageing is accompanied with changes in the homeostatic control systems that regulate fluid and electrolyte balance (Rolls and Philips However, under free-living conditions, older adults are more prone to become dehydrated than their younger counterparts. Fluid deficits in older adults can occur through a variety of routes such as: a blunted thirst response, resulting from a decrease in the sensitivity of volume and osmoreceptors (Kenney and Chiu Data on young adults highlights that electrolyte composition, as well as certain macronutrients (i.e., protein/carbohydrate), are important in determining the fluid retention response to beverage ingestion (Maughan et al. 