Wear your heart rate monitor correctly to accurately gauge your heart rate during cardio exercise. Women should wear it right against their skin under their sports bra.

Though chills are typically associated with cold weather, runners can develop chills all over their bodies in both hot and cold weather. The causes for chills in hot weather are vastly different and more serious than those in cold weather.

When you run or perform any other aerobic activity, staying in your target heart rate range can help ensure that you are working hard enough to see results, but not working so hard that you are at risk for injury or illness. Your optimal target heart rate depends on your age and how fit you are.

The most effective exercise programs engage all the major muscle groups. Following a regular, routine exercise regimen has a host of health benefits than can improve your quality of life and ability to perform everyday tasks.

The target heart zone of a high-intensity intervals workout is between 80 and 95 percent of your maximum heart rate.

Doing a cardio workout twice daily advances your weight-loss efforts, improves your health and saves time.

When exercising, knowing several statistics about your workout can help you determine whether you've reached your fitness goals for the day. You might be interested in how many calories you've burned, for example, or how far you ran on the treadmill.

Bradycardia is a heartbeat that is slower than normal. A pulse less than 60 beats a minute is generally considered cause for concern, although some young people and trained athletes may have a slow pulse because they are physically fit.

Food and water are essential to the body. Therefore, dehydration and lack of food greatly impact your body's ability to function properly. Even a temporary lack of food and water can affect your health, and ongoing deprivation is life threatening.

A stress test can be used to identify heart problems and other health issues. One type of stress test is performed on a treadmill while technicians gradually increase speeds and inclines and monitor your heart's response.

Your diaphragm is the muscle that separates your abdomen from your chest cavity while acting as the main muscle controlling respiratory activities.

A high heart rate could be the result of stress or anxiety. When you are under duress, your body releases a chemical called adrenaline as part of the “fight or flight” response. Adrenaline increases your breathing and heart rates in an effort to help you deal with the cause of the stress.