How Does Heart Rate Variability Work? Your heart rate is governed by the balance of the sympathetic and parasympathetic nervous systems, explainsNino Isakadze, MD, a cardiac electrophysiology fellow at Johns Hopkins Medicine in Baltimore. These systems are part of the autonomic nervous system, which...
As you get older, your gut -- particularly your colon -- may become sluggish and less toned. One in three people age 60 or older have diverticula, which are outpouchings in the lining of the large intestine. These pouches are the result of increased pressure within the intestine caused ...