As raindrops splash against the ground, they loosen the soil. When the soil can no longer absorb anymore rain, the rain washes across the ground, carrying loose soil with it. This type of runoff carries fertilizers and other types of pollution to larger bodies of water, which can harm fish and reduce drinking water quality. Soil carried into the water can also build up in rivers and streams and may eventually cause them to dry out or flood their banks. Even soil that doesn't make it all the way to the water can end up as ugly layers of mud on walkways and other paved surfaces.
“Having an extremely low body-fat percentage can affect the cardiovascular system’s ability to function normally,” says cardiologist Kevin Campbell , ., fellow of the American College of Cardiology. For example, in one study published in the International Journal of Sports Physiology and Performance , when bodybuilders prepared for competition by lowering their body fat, their heart rate dropped to 27 beats per minute. Too low heart rates, called bradycardia, can lead to dizziness, passing out, and cardiac arrest. Meanwhile, other electrolyte imbalances due to too-low of a body fat percentage, not to mention caloric intake, can lead to “cardiac arrhythmias and sudden cardiac death, he says.