Health: Heart Disease Essay

1413 words - 6 pages

How much does my heart rate change after running in place for 10 minutes?
Introduction
The leading cause of death in the US is heart disease and the fourth leading cause of death in the US is stroke. Both are related to the heart. Both can be prevented (or at least somewhat alleviated) by engaging in exercise. Among the other leading causes of death is diabetes, which is related to being obese (and therefore sedentary). Exercise can reduce the chance of becoming diabetic and is also important in managing diabetes. In fact, 250,000 deaths in the US can be credited to leading an exercise-free lifestyle. Less than 1/3 of adults actually do enough physical activity.
Heart rate is the amount of times the heart beats per minute. The heart beats every time the muscle contracts in order to pump oxygen through the medium of blood throughout the body. When you exercise, your muscles need more oxygen in order to undergo cellular respiration for energy. Therefore, during exercise the heart must contract more often for the muscles to receive sufficient oxygen. However, how much faster is related to the fitness level of each individual and the intensity of the exercise. Therefore, understanding how a physical activity, such as running in place for 10 minutes, affects heart rate can help us understand cardiovascular health and possibly preventing cardiovascular diseases.
Research and Current Ideas
Resting heart rate is the amount of times a heart beats per minute (bpm) when the individual is sitting or lying down without having previously engaged in intense of physical activity. In other words, the resting heart rate is taken when the heart is working the minimum so at the very least the individual remains alive. Stress can cause an increase in resting heart rate.
It has been found that those who do exercise are at a lower risk for cardiovascular disease. If people who exercise regularly do develop cardiovascular disease, they are usually older and their condition is less severe. Currently, by the American Heart Association’s standards, every adult should do 150 minutes of moderate exercise or 75 minutes of intense exercise a week. A similar recommendation comes from the 1996 Surgeon General’s Report on Physical Activity and Health; adults are advised to exercise moderately 30 minutes a day, every day.
Individuals who do follow this recommendation tend to have a lower resting heart rate. Usually the lower the heart rate, the higher the fitness level of the individual. The average adult’s heart rate is between 60-100 beats per minute. This is because during exercise muscles need more oxygen so they end up sending more blood to the heart and receiving more blood from the heart. After a while, the heart chambers dilate to hold more blood, and the muscle hypertrophies in response to the increase of stimulation. Thus the heart becomes more efficient at pumping blood. Aerobic exercises like running and swimming are particularly...

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