Premature ventricular contractions, or PVCs, can occur at any time, and are generally considered benign. However, it can be physically and psychologically stressful to experience PVCs during exercise.

The average American diet includes 8 oz. of meat each day, twice the world's average, according to "The New York Times." If you have concerns about heart disease, the number one health problem in the U.S., restricting your consumption of meat is important.

Knowing your target heart rate every year is important because this rate changes as you get older. The rate for a 40-year-old man or woman at the beginning of middle age is lower than for younger adults and higher than older adults.

Peroneal tendons are located along the outside portion of your ankle, running into the rear of your foot. Although these tendons are designed to take a tremendous amount of stress while running, excessive repetitive forces on them can cause a burning sensation and/or irritation in the ankles.

The sternum, which is commonly referred to as the breastbone, is a long, flat bone in the center of the chest. The sternum is connected to the rib bones by cartilage. Its primary function is to provide protection for your lungs, heart and major blood vessels.

One of the benefits of exercise is that over time, your blood pressure may become lower. However, having your blood pressure drop and your heart rate go up during an exercise session is a sign of a problem. Numerous issues, including nutritional deficiencies and health conditions, may cause this situation.

Blacking out involves a sudden reduction of blood flow to the brain that results in a temporary loss of consciousness. Sudden black outs can sometimes occur during high-energy exercise activities such as running. There are several reasons why a runner might black out.

Burping while running is not an uncommon affliction. If you run frequently, it's common to experience burping at some point during one of your runs. While researchers cannot pinpoint a single cause for this widely shared trait, they have identified several possible culprits.

The normal heart rate for an average adult is 60 to 100 beats per minute. This number can increase to a maximum heart rate during exercise that varies with age. Your heart rate, both at rest and during exercise, is controlled by the nervous system.

Irregular heartbeat during exercise, known also as a heart arrhythmia, premature heart contractions or colloquially as skipping a beat, can result from a variety of causes. Some of these causes relate to permanent conditions or diseases, while others are temporary conditions.

Your heart rate while exercising is an indicator of the level of intensity and effort you are putting into the ongoing activity. A high heart rate verging on the maximum does present more risks and could be considered dangerous depending on a variety of factors.

Exercise done in water, or aquacise, offers a multitude of benefits and options. Aquatic fitness provides buoyancy, taking away most or all impact on your bones, joints and muscles, while the water adds pressure to your body, which comforts joints and internal organs and reduces stress on your heart.