| A | B |
|---|
| recovery heart rate | the return of your heart to resting levels within 5-10 min. after activity |
| diaphragm | a muscle in your chest used in breathing |
| intercostal | a muscle around your ribs used in breathing |
| abdominal | a muscle in your lower stomach used in breathing |
| asthma | a restriction of your breathing passage due to allergies or even exercise |
| hemoglobin | an iron rich compound in the blood that helps carry oxygen from the lungs to muscles |
| circulatory system | the heart and the blood vessels |
| artery | a blood vessel that carries blood away from yout heart |
| capillary | a blood vessel that delivers oxygen and other nutrients to individual cells |
| vein | a blood vessel that collects blood from the capillaries and carries it back to the heart |
| muscle pump | a contraction of the muscles to squeeze the veins to help blood move back to your heart |
| blood pressure | the force at which blood is pushed against the walls of the arteries |
| systolic blood pressure | the pressure on the arteries when the heart contracts (top #) |
| diastolic blood pressure | the pressure on the arteries when the heart relaxes after contraction (bottom #) |
| atherosclerosis | a disease process that causes substances to build up inside the arteries, reducing are blocking blood flow |
| myocardial infarction (MI) | a heart attack; a blockage of a blood vessel that feeds the heart |
| stroke | a blockage of an artery that feeds the brain |
| hypertension | high blood pressure |
| aerobic | activity that requires your muscles to use oxygen |
| anaerobic | activity that lasts only a few seconds and does not require large amounts of oxygen |
| aerobic fitness level | cardiovascular fitness level |
| interval training | alternating high intensity exercises with low intensity for several minutes at a time |
| slow-twitch muscle fiber | a muscle cell that is associated with the ability to do aerobic exercise |
| fast-twitch muscle fiber | a muscle cell that is associated with the ability to do anaerobic work |
| percentage of maximum heart rate | a method of calculating your maximum heart rate |
| target heart rate zone | the recommended intensity for aerobic conditioning |
