Basics of Cardio Respiratory Endurance Chapter 7

Aerobic Activities and the Body Cardio Aerobic activity is continuous activity that requires large amounts of oxygen

Your Circulatory System The circulatory system consists of the heart, blood, and blood vessels; sometimes called the cardiovascular system. The heart- the main component of the circulatory system. The Heart Video Hemoglobin- is an iron rich compound in the blood the helps carry oxygen. Stroke Volume- the amount of blood pumped per beat Blood vessels- the way blood is transported in the body Arteries- carry blood from the heart to the major extremities (oxygenated) Veins- deliver deoxygenated blood back to the heart Capillaries- deliver oxygen and other nutrients to individual cells.

Your Respiratory System Respiratory System- The body system that exchanges gases between your body and the environment. The-Respiratory-System Video Diaphragm- muscle found between the chest cavity and abdomen.

Benefits of Aerobic Activity Increases stroke volume (heart works more efficiently) Conditions muscles Increased Energy Less Stress Look and feel better Will Power

Problems and Care of Your Heart and Lungs Lifestyle Disease- diseases that are a result of certain lifestyle choices, such as: Inactivity Being overweight Smoking and using other forms of tobacco Eating unhealthy foods

Cardiovascular Disease (CVD) Cardiovascular Disease- any medical disorder that affects the heart or blood vessels. Angina Aortic disease Atrial fibrillation Blood clots Chest pain Congestive heart failure Heart attack Murmur Palpitations Just to name a few

Atherosclerosis Atherosclerosis- a condition in which fatty deposits called plaque build up inside the arteries, restricting or cutting of blood flow.

Heart Attack One million people in the United States suffer a heart attack. A heart attack results from a blockage of a blood vessel that feeds the heart muscle. Heart Attack Signs Clip

Other Diseases Sudden Cardiac Death: Less than 35 attributed to heart defect Over 35 attributed to atherosclerosis Stroke- when the blood flow to a persons brain is interrupted or cut off entirely by the blockage of an artery. Sudden numbness in face or limbs (especially on one side) Sudden confusion, trouble speaking Trouble seeing out of one or both eyes Trouble walking or dizziness Sudden severe headache with no known cause

Other Diseases Peripheral Vascular Disease- CVD that occurs mainly in the legs, and less frequently in the arms High Blood Pressure/Hypertension (the silent killer)- a key risk factor in heart attacks, strokes, and heart failure Can live for years without knowing you have it

Diseases of the Lungs 200,000 deaths from lung cancer each year, most preventable cause of death. Emphysema- is a disease in which the small airways of the lungs lost their normal elasticity, making them less efficient in helping move air in and out of the lungs. Changeable Risk Factor: Avoiding tobacco

Measuring Cardiorespiratory Endurance Maximal Oxygen Consumption- the largest amount of oxygen your body is able to process during strenuous aerobic exercise The more fit you are the higher your VO2 Max Slow-Twitch Muscle Fiber- muscle fibers that contract at a slow rate Endurance activities Fast-Twitch Muscle Fiber- muscle fibers that contract rapidly, allowing for greater muscle strength

Factors Affecting Cardiorespiratory Endurance Age Heredity Gender Body composition Level of conditioning

Aerobic vs. Anaerobic Aerobic Activity- Aerobic activity is continuous activity that requires large amounts of oxygen Hiking Cross country skiing Anaerobic Activity- higher levels of muscular strength and muscular endurance and flexibility 40 yard dash Fast break in basketball Swimming 100 meters as fast as you can

Interval Training A program in which high-intensity physical activities alternate with low-intensity activities Advantages: Workout at higher intensity for longer period of time compare to a traditional workout Burn more calories Improves both health and skill-related fitness