Ch. 7-Basics of Cardiorespiratory Endurance Section 1 and 2

Introduction Define aerobic activity? How do they benefit the body? What is the circulatory system? What is the respiratory system? What are problems or diseases that can develop? What can I do to prevent problems? What is blood pressure?

Aerobic Activities and the Body Continuous activity that requires large amounts of oxygen “With Oxygen” Strengthen your heart Strengthen your lungs More efficient using oxygen

Circulatory System Consists of the heart, blood, and blood vessels Hemoglobin-an iron rich compound in blood that helps carries oxygen Stroke Volume-amount of blood pumped per beat

Blood Vessels Arteries, capillaries, and veins Arteries-carry blood from the heart to body Capillaries-deliver oxygen and nutrients to individual cells Veins-deliver blood back to the heart

Respiratory System Body system the exchanges gases between body and environment Lungs Diaphragm-the muscle between chest cavity and abdomen that helps lungs work

Benefits of Aerobic Activity Increases stroke volume Lowers resting heart rate=more efficient Muscles more efficient Builds on itself=more you condition, the more strenuous activity you are able to do

Long Term Benefits Cardiorespiratory Endurance-the ability for the body to work continuously for long periods of time Lower risks of diabetes, CVD, and obesity Increased energy Less stress Look and feel better

Lifestyle Diseases Diseases that are a result of certain lifestyle choices Inactivity Being overweight Smoking or other forms of tobacco Eating foods high in fat and cholesterol

Cardiovascular Disease (CVD) Any medical disorder that affects the heart or blood vessels Leading cause of death in US Atherosclerosis-condition in which fatty deposits called plaque build up in arteries, restricting blood flow

Cardiovascular Diseases Heart Attack-blockage of blood vessel Sudden Cardiac Arrest-during game or practice Stroke-blood flow to brain is blocked Peripheral Vascular Disease-legs, arms

Diseases of the Lungs Lung Cancer-more than half smoking related Emphysema-disease in which airways of the lungs lose their normal elasticity making them less efficient in helping to move air Emphysema Man – True Story https://www.youtube.com/watch?v=VUecUEkECrA

Changeable Risk Factors Physical Activity Avoid Tobacco Maintain Healthy Weight Eating Right Having Regular Check-Ups

Blood Pressure Force of blood in the main arteries Systolic-when heart muscle contract (top number) Diastolic-when heart muscles relax (bottom number) Ex: 120/80

Hypertension High Blood Pressure “Silent Killer” Main risk factor in heart attack, stroke, and heart failure Explanation of Hypertension https://www.youtube.com/watch?v=tTKnNp7bw8Y Heart Conditions: https://www.youtube.com/watch?v=T8zkvdkzU7A

What happens during a Heart Attack

Aortic Dissection

Body Invaders: Heart Attack Signs, Symptoms, Risks http://health.howstuffworks.com/human-body/heart-attack-videos-playlist.htm   New way to see inside the heart http://abcnews.go.com/GMA/OnCall/video/inside-heart-10698053 HDL & LDL Cholesterol: https://www.youtube.com/watch?v=0U7YHRW5dyc How a Heart Bypass operation works https://www.youtube.com/watch?v=3Nf6Q2skGOM https://www.youtube.com/watch?v=YU-AB_THem8 (actual – more graphic)

Cardiorespiratory Endurance Chapter 7 Lessons 3 & 4 Cardiorespiratory Endurance

Measuring Cardiorespiratory Endurance Maximal Oxygen Consumption=VO2 MAX Largest amount of oxygen your body is able to process during strenuous aerobic exercise How is it measured? http://www.youtube.com/ watch?v=fn3Yr-LS_l0 http://www.youtube.com/ watch?v=Ca0qhTkaOt8

Factors Affecting Cardiorespiratory Age Heredity Body Composition Level of Conditioning

Factors Affect Cardiorespiratory Age Declines after 25 5ml/kg/min per year Heredity Gender M>F Higher hemoglobin levels Slow-Twitch Long distance runner Increased ability to do aerobic work Fast-Twitch Weight Lifters Little bearing on aerobic levels

Factors Affecting Cardiorespiratory Body Composition Body Fat reduces Aerobic Capacity Reducing body fat increases fitness level Level of Conditioning Genetics Trainability FITT Specific Goals

Making Most of What You Have Factors we cannot control Start while you’re young Stay active Pay attention to fitness factors you can control Make your body work for you, rather than against you

Anaerobic Fitness Muscular strength, muscular endurance, and flexibility Require large amounts of energy Examples: Sprinting Fast-Break in Basketball Fly Route in Football Kick-Boxing Running up two flights of stairs

Interval Training A program in which high- intensity physical activities alternate with low- intensity recovery bouts for several minutes at a time What have we done? Other examples? “Insanity” http://www.youtube.com /watch?v=ZLK28BHJDd8

Physical Activities Aerobic Anaerobic Continuous activity that requires large amounts of oxygen Examples: Jogging/Running Swimming Bicycling Skiing Dancing Activity that requires high levels of energy and is done for only a few seconds or minutes at a high level of intensity “Without Oxygen” Talk Test Examples?

Group Work Pick a sport List the components of the sport that are aerobic List the components of the sport that are anaerobic