Benefits of Aerobic Exercise

Written by Gary Gresham


Continued from page 1
Aerobic workouts make you feel better about yourself so you can enjoy life more. It boosts your mood, strengthens your heart muscle, helps you maintain your weight and can even lower your blood sugar levels. It can help increase your stamina and help you manage stress. A session of aerobic activity can help you relax after a stressful day at work. It can even improve your sexual performance. If you maintain a regular aerobic exercise program as you get older, your muscles will stay stronger and help you avoid fractures and falls. This will help keep you independent and on your own longer. People who engage in exercise and cardiovascular fitness appear to live longer than those who don't. Aerobic activity comes in many forms and you can benefit fromrepparttar time you spend in doing them. The benefits of aerobic exercise are good for your body and your mind and will help to make you live longer, stay healthier and feel great. Copyright © 2005 Treadmill Info.com All Rights Reserved.

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The Fitness Stress Test

Written by Brian D. Johnston


Continued from page 1

VO2max is another important consideration ofrepparttar stress test and this correlates well with physical fitness at least in a cardiorespiratory and cardiovascular sense. The amount of oxygen consumed byrepparttar 144932 myocardium is dependent on oxygen demand: heart rate, contractility, and wall tension. The individual will exercise untilrepparttar 144933 oxygen demand byrepparttar 144934 myocardial cells exceedsrepparttar 144935 ability ofrepparttar 144936 stenotic coronary artery to deliver oxygen. In other words, exercise continues untilrepparttar 144937 coronary reserve has been exhausted. At this point, ischemia is induced and exercise must be terminated. Duringrepparttar 144938 exercise test, ifrepparttar 144939 individual experiences pectoral angina, intense dyspnea or unusual changes on repparttar 144940 electrocardiogram, or significant rhythm change due to a heart block or ventricular disturbance, an unsupervised exercise program may be contraindicated.

The test may be stopped for reasons other than reaching a VO2max upper threshold or having chest discomfort; fatigue, dyspnea, and musculoskeletal problems may causerepparttar 144941 mature adult to discontinue exercise. The test also will be terminated ifrepparttar 144942 blood pressure drops asrepparttar 144943 work increases. Blood pressure is recorded beforerepparttar 144944 test, at an exercise peak, and at recovery. Diastolic BP should remain constant, but could increase slightly because of anxiety. It then could decrease oncerepparttar 144945 test begins. Systolic BP usually increases by 60+/-25 mm Hg in males 50-64 years of age, and by 40+/-20 mm Hg in women inrepparttar 144946 same age group. For example, ifrepparttar 144947 systolic BP fails to increase, or initially increases then drops by more than 20 mm Hg during exercise, then it may indicate severe left ventricular dysfunction. Shouldrepparttar 144948 systolic blood pressure fall more than 30mm Hg, then an unsupervised exercise program may be contraindicated.

Sometimesrepparttar 144949 stress test shows heart complications when, in fact, extrinsic factors are responsible, and this will cause a false-positive result. These include:

-Hypertension

-Fasting

-Drug use (e.g., antidepressants) -repparttar 144950 physician will take into accountrepparttar 144951 effects of any medicationrepparttar 144952 individual may be taking

-Malfunctioning ECG recording equipment

-And a host of other minor heart complications that should not stop an individual from participating in an exercise program.

It will be up torepparttar 144953 physician to removerepparttar 144954 causative agent and re-testrepparttar 144955 patient. This especially is necessary to discover ifrepparttar 144956 patient is asymptomatic or hasrepparttar 144957 potential for a high exercise capacity. A false-negative test resulting from an extrinsic factor is even more disturbing as this would indicate failure to diagnoserepparttar 144958 presence of abnormal coronary arteries. It then is up torepparttar 144959 physician to rely on other test procedures and forrepparttar 144960 individual orrepparttar 144961 fitness professional to monitor progress carefully and to supplyrepparttar 144962 physician with any information in regard to physical difficulty during exercise.

Ifrepparttar 144963 test is performed properly, and there is a negative ECG response to exercise,repparttar 144964 test does not indicate coronary disease necessarily. Rather, it implies a risk factor that must be taken into consideration when an exercise program is created, and that there must be close monitoring ofrepparttar 144965 individualís health and fitness level.

CONTRAINDICATIONS FOR A STRESS TEST

-Acute myocardial infarction (heart attack)

-Uncontrolled congestive heart failure

-Acute inflammatory cardiac disease, e.g., active rheumatic heart disease, myocarditis

-Acute asthma or pneumonia

-Blood pressure greater than 240/120 mm Hg and uncontrolled

-Acute renal (kidney) disease

Brian D. Johnston is the Director of Education and President of the I.A.R.T. fitness certification and education institute. He has written over 12 books and is a contributing author to the Merck Medical Manual. An international lecturer, Mr. Johnston wears many hats in the fitness and health industries, and can be reached at info@ExerciseCertification.com. Visit his site at www.ExerciseCertification.com for more free articles.


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