Gold Member Badge


  • You're all caught up!

What Are the Benefits of a Good Cardiovascular System?

author image Paula Quinene
Paula Quinene is an Expert/Talent, Writer and Content Evaluator for Demand Media, with more than 1,500 articles published primarily in health, fitness and nutrition. She has been an avid weight trainer and runner since 1988. She has worked in the fitness industry since 1990. She graduated with a Bachelor's in exercise science from the University of Oregon and continues to train clients as an ACSM-Certified Health Fitness Specialist.
What Are the Benefits of a Good Cardiovascular System?
Two mountain bikers riding together Photo Credit: Karl Weatherly/Photodisc/Getty Images

Your cardiovascular system is made up of your heart, arteries, veins and capillaries. The heart has four separate chambers--two atria, or upper chambers, and two ventricles, or lower chambers. The right atrium and ventricle accept blood from your body and pump it into your lungs. The left atrium and ventricle receive blood from your lungs and pump it into the main artery of your body, the aorta.

Video of the Day

Stroke Volume

Stroke volume is the amount of blood the left ventricle pushes out in one beat. Aerobic exercise increases your stroke volume. When your stroke volume increases, your heart does not have to beat as many beats to deliver the same amount of blood to your body. A healthy cardiovascular system means your heart can easily expand and contract, increasing your stroke volume.

Blood Flow

Arteries deliver oxygenated blood to your cells. Your arteries are elastic in that they easily open and contract to pump blood throughout your body, especially to those parts farthest from your heart. When plaque builds up within your artery walls, it decreases their elasticity and the size of the opening. Less blood can flow through diseased arteries.

Cardiovascular exercise reduces the amount of plaque buildup and maintains the elasticity of your arteries. Aerobic exercise also increases the number of capillaries in your working muscles. A healthy cardiovascular system can deliver more blood at a faster rate to exercising muscles.

Energy Production

A healthy cardiovascular system through aerobic exercise stimulates the production of more enzymes, which convert the food you eat into energy your cells can use. It also stimulates the formation of more mitochondria, the cell structure where energy production takes place. The more aerobic exercise you do, the greater the improvement in your cardiovascular system. A more improved cardiovascular system enhances your aerobic fitness, making you a faster runner, swimmer or cyclist.

Disease Risk

The ease at which your cardiovascular system can pump and transport blood and enhance energy production decreases your risk of chronic disease. Such diseases include heart disease, high blood pressure and high cholesterol. Aerobic exercise stimulates the production of the good cholesterol in your blood. These good cholesterol carriers remove plaque/cholesterol, maintaining the function of your blood vessels, decreasing your risk of a heart attack and stroke and preserving normal blood pressure.

Temperature Regulation

A healthy cardiovascular system improves your body's ability to regulate body temperature. In a hot environment, the blood vessels leading toward your skin dilate to cool your blood and therefore your body. In cold temperatures, your cardiovascular system must work to constrict the blood vessels in your limbs, directing blood to your internal organs, maintaining core body temperature.

LiveStrong Calorie Tracker
Lose Weight. Feel Great! Change your life with MyPlate by LIVESTRONG.COM
  • Gain 2 pounds per week
  • Gain 1.5 pounds per week
  • Gain 1 pound per week
  • Gain 0.5 pound per week
  • Maintain my current weight
  • Lose 0.5 pound per week
  • Lose 1 pound per week
  • Lose 1.5 pounds per week
  • Lose 2 pounds per week
  • Female
  • Male
ft. in.



  • “Anatomy & Physiology”; Gary Thibodeau, Ph.D. and Kevin Patton, Ph.D.; 2007
  • “Exercise Physiology, Energy, Nutrition & Human Performance”; William McArdle, Frank Katch and Victor Katch; 2007
  • “Personal Trainer Manual”; American Council on Exercise; 1997
Demand Media