Because when you are having an exercise you body needs more oxygen and food to be delivered to different organs. That's way the heart has to work harder.
No it does not. The heart stays the same size, yet its ventricles and atriums get stronger and more efficient allowing blood flow to increase- This works the same as an obese person due to that the heart pumps blood through more miles of vessels.
During and after strenuous exercise, a student-athlete's heart beats quickly to pump more oxygen-rich blood to the muscles and organs that need it. This helps the body meet the increased demand for energy and oxygen during physical activity.
If someone does 50 setups will there heart increas or decreas
The heart rate will increase due to hypovolaemic shock!
A polar heart watch is good for monitoring your heart rate before during and after exercise. If you are an avid athlete or just want to keep track of your heart rate, it would be good for you.
Depending on how light or heavy exercise is will depend on the change that occurs. Typically during exercise heart rate will increase. This is in order to increase blood flow to the working muscles to allow for increased respiration - in order for the muscles to work efficiently. Therefore the more strenuous the exercise, the more your heart rate will increase. Blood pressure will also increase during exercise and again depends on intensity levels. During exercise such as running/cycling/swimming systolic pressure will increase progressively whereas diastolic pressure will increase only slightly. During weight lifting exercises, both systolic and diastolic pressures will rise. Obviously these effects will vary from person to person, depending on age, gender, exercise level, exercise intensity etc. etc.
It would go up because their heart is trained so well it can pump blood round the body with ease.
To decrease the possibility of developing an "athlete's heart" vigorous exercise for young adults should be avoided.
Because the heart has to pump more oxygen than usual to your muscles
I believe so.
your heart rate raises when listening to "loud" music...
During exercise, heart rate and blood pressure typically increase. This is because the heart needs to pump more blood to deliver oxygen and nutrients to the muscles. The increase in heart rate helps to increase blood flow, which in turn raises blood pressure. This relationship is a normal response to the body's increased demand for oxygen and energy during physical activity.