How Dehydration Affects Your Heart Water Is essential for life, but many overlook exactly how a lack of fluids strains the cardiovascular system. If you lose more water than you consume, whether through sweating, breathing, exercise, illness, or daily bodily functions, your body begins to work harder to maintain balance. https://www.tumblr.com/dramitpatil/820316874399203328/how-dehydration-affects-your-heart?source=share