Explain why the link between pulse rate and activity is valid. This link makes sense because as you exercise, your heart rate increases and you begin to take in more oxygen to clear your body of the lactic acid that has accumulated. Some people can squeeze the clothespin more than others in a minute. That's because they have stronger muscles.
The more powerful your muscles are, the more work they do when you use them. In other words, the harder you work, the more your muscles will grow. This is how athletes and bodybuilders build size and strength.
So, as you can see, the connection between pulse rate and activity is very strong. Your heart rate increases as you exercise, so it is easy to know if you are being active enough to keep yourself healthy.
During exercise, the heart must beat faster because boosting the heart rate allows the body to enhance cardiac output and supply the required blood flow to the muscles. Muscles in the body increase their activity level and require more oxygen during exercise. The only way to meet this increased demand for oxygen is by increasing the rate at which the lungs and heart pump blood throughout the body. The two main ways by which the body increases cardiac output are through increases in heart size or cardiac muscle mass and increased blood volume.
The heart rate of an individual exercising in the resting state is called the resting heart rate. It varies between individuals but is usually less than 100 beats per minute (bpm). As you get older, your resting heart rate tends to be higher than that of someone who is not aging-relatedly. Also, the heart rate of people who have been diagnosed with cardiovascular disease or who have a risk factor for such disease is often listed as a part of their medical history.
At rest, most people's hearts beat 60-100 times per minute. This rate is called the resting heart rate. During exercise, your heart rate increases to meet the demands of the exercising muscles. The maximum heart rate is the highest heart rate you can achieve while still maintaining your breathability. At first, as you begin an exercise program, your maximum heart rate will be lower than it is later after you have become fit.
Physical activity increases during exercise, and muscle cells respire more than when the body is at rest. During exercise, the heart rate rises. The pace and depth of breathing increase, allowing more oxygen into the blood and removing more carbon dioxide from it. This process requires energy, so the body uses its stores of glycogen for fuel. Glycogen is found in the muscles and liver.
When physical activity ceases, the body returns to its normal state of rest, including your heart rate and breath rate. These things remain increased for some time after exercise ends.
The more intense the exercise, the longer these changes last. Moderate exercise increases the heart rate and slows the breath rate for about 30 minutes, while vigorous exercise does so for nearly an hour. Afterward, the body's systems return to normal.
Effects of Exercise on Respiratory System
Increased Physical Activity: Increases air flow through the lungs causing bronzation of skin and increased temperature of blood
Decreased Physical Activity: Slows down air flow through the lungs causing coldness of blood and gray coloration of skin
Exercise can also affect the respiratory system by changing the size of certain areas of the lung. For example, exercise has the effect of widening the airways that lead from the nose to the lungs.
The number of breaths taken in one minute can be used to calculate the rate of breathing. This is called the respiratory rate.
The respiratory rate increases to help supply more oxygen to the muscles and remove more carbon dioxide from the body. As the body gets more exercised, it needs more oxygen and so it increases the rate at which it breathes. At any given time, most people breathe between 12 and 20 times per minute. During intense activity, such as running or cycling, this number may rise to 30 or more breaths per minute.
People who do not get enough sleep will have slower breathing rates. When you are tired, your brain sends out signals to certain organs including the lungs and heart. It tells them to function less efficiently for when you are sleeping soundly. This means that they work harder than normal to deliver the same amount of oxygen to all the parts of your body. This is why people who do not get enough sleep feel sluggish and have difficulty concentrating.
Slow breathing also indicates that you are afraid. If you are anxious about an exam or a meeting, you will experience rapid breathing. To calm yourself down, you might want to take some deep breaths. This will help you relax and reduce the rate at which you breathe.
The rate of the first few heartbeats after exercise is proportional to the intensity of the activity and the resting rate. The pace of deceleration after exercise is proportional to the intensity of the activity and the increase in pulse rate immediately after exercise. At low levels of exertion, the rate of recovery is about 100 beats per minute (bpm). As effort increases, the rate of recovery decreases.
At rest, most people have a pulse rate between 60 and 100 bpm. With increasing physical activity, your heart rate increases to meet the demands of exercising more vigorously. It can range from 120 to 150 or more at high levels of activity. The number of beats per minute varies depending on how much stress you place on your body by exercising at different rates. For example, if you walk at a moderate pace for 30 minutes, your heart rate will be 70-80% of its maximum value. If you sprint up a flight of stairs or cross a field trying to catch a bus, it could go as high as 190-200 bpm.
After exercise, your heart rate declines as blood flows back to your lungs and liver and as your muscles relax. The rate of decline depends on the intensity of your workout and your age. For example, someone who has been walking at a moderate pace for 30 minutes would expect his or her pulse to drop 10-20 bpm.
When you exercise, especially jogging, your heart rate rises, causing your pulse to quicken since your body is under physical stress. When you are stressed, your heart has to pump more blood that contains oxygen and nutrients throughout your body, which causes your pulse to rise. As your body gets used to the stress, it changes some of the muscle fibers in your chest cavity to be faster beating muscles so your heart doesn't have to work as hard and your pulse will gradually return to its normal rate.
Here are several other reasons why your pulse might change:
If you are sitting still for a long time, like when you are in class or at work, your pulse will slow down.
If you are standing up very quickly, like when you jump off a stepstool or climb stairs, your pulse will quicken.
If you are scared or excited, your pulse will increase.
If you are feeling pain in your chest, your pulse will probably go up.
Pulse rates over 100 per minute are usually not healthy because they can be an early sign of serious problems such as heart failure or coronary artery disease. A pulse rate under 60 per minute is called bradycardia and may be a warning sign of serious problems such as heart attack or stroke.
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