Magnesium and potassium, along with sodium and calcium, are examples of electrolytes that are present in the blood. Electrolytes help trigger and regulate electrical impulses in the heart and low levels of magnesium and potassium can lead to an electrolyte imbalance, which can contribute to arrhythmia.
Passing hard stools is usually as a result of constipation or the infrequent movement of the bowels. Most healthy people have at least three bowel movements per week, according to MedlinePlus. If you are unable to have a bowel movement or are having difficulty passing stool, contact your doctor.
Low-Fiber Foods. White rice is a low-fiber food Photo Credit Yelena Yemchuk/iStock/Getty Images. A diet that is low in fiber is more likely to cause hard stools, according to Emedtv.com. Fiber is the indigestible part of plant foods and is important for softening stools because it absorbs large quantities of fluids.