They have initially discussed the need to maintain the body fluid balance at all times as one of the principal homeostatic mechanisms of the human body and that this maintenance is of vital importance during exercise via fluid replenishment, in order to overcome inadvertent fluid losses and to restore the normal body fluid balance (ACSM, 1995; Gisolfi & Dutchman, 1992; Murray, 1987 cited in Passe et al, 2000:219). They further discuss that the phenomenon of voluntary dehydration was first observed and elucidated in adults several decades ago and has more recently been discerned in children too. However, they did not define the term voluntary dehydration adequately. Greenleaf and Sargent (1965:719) defined the term voluntary dehydration as 'the delay in complete rehydration following water loss' (Greenleaf & Sargent, 1965) and this phenomenon is of prime concern in individuals involved in vigorous physical activity including athletes, military personnel, etc . Hypohydration, on the other hand, has been defined as 'the state of decreased water content while the osmotic concentration of the body is maintained (Greenleaf & Sargent, 1965:719). ...
e the severity of voluntary hydration and it has been shown that cool water, as opposed to warm water and addition of flavor and carbohydrate electrolyte components were important factors which contributed towards an increased fluid intake thereby reducing the severity of voluntary dehydration (Rothstein et al., 1947, Sohar et al., 1962, Wilk et al., 1996 and 1998 cited in Passe et al, 2000:219).
Since the main focus of this study is the impact of hedonic value of a beverage on its consumption, the authors describe the concept of hedonic value, as being a sensory measure of liking and discuss the studies conducted previously in this regard, highlighting their important findings (Hubbard et al., 1984; Wilmore et al., 1998 cited in Passe et al, 2000:220). Since conflicting views exist on the use of the terms such as acceptability and palatability, the authors have discussed the different views. For this study, the authors have taken both these terms to be used interchangeably and have used a pre-validated 9 point scale for the measurement of hedonic value as done previously by Cardello (1996) and suggested by Yeomans (1998) (Cardello 1996; Yeomans 1998 cited in Passe et al, 2000:220)
The authors proposed that although several studies have investigated the factors influencing voluntary fluid intake during exercise, relationship of the qualities and composition of the beverage and the taste preference of the individuals with intake of a particular beverage, there are no existing studies which have investigated the impact of hedonic value of a beverage on its voluntary consumption and its relationship with exercise. An extensive literature showed that this was indeed the case.
Therefore, the objectives of this study were to investigate the effect of the hedonic value of