Since blood is mostly water, dehydration can increase the risk of coronary heart disease, due to the increased viscosity of the blood. (drlaurell.com)
Raise the viscosity of your blood and you ARE playing with your life. (sbnation.com)
As mentioned above, the water influences the viscosity of the blood and the process of burning fat, meaning that dehydration will affect the quality of your workout by decreasing your energy levels and slowing down your efforts to lose body fat. (fitnessandpower.com)