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.
Mitch Diamond/Photodisc/Getty Images. Because digestion is quite a variable process, most people experience hard stools from time to time, while for others, hard stools may be more of a chronic problem. Let's take a look at what might be causing you to experience hard stools and what you can do to soften them up.