Body fluid banlance and cardiovascular adaption

Dehydration affects not only temperature regulation,performance,but also normal cardiovascular functions.Usually,the negative effects induced by dehydration vary with dehydration levels.When a human body is gradually dehydrated during exercise,the environmental temperature is an important factor influencing cardiovascular functions.However,when a human body is well hydrated,this effect becomes not significant.Fluid replacement during exercise can prevent and correct dehydration,maintain and improve cardiovascular functions.It has been also suggested that the effect of fluid replacement on cardiovascular functions is directly related to ingested volume,ingesting time and the composition of ingested beverage.