Explain why the body needs a higher cardiac output during exercise.?
459295
during muscular exercise ,venous return is increased by the pumping action of the muscles and the increse in respiration.in addition due to the the vasodialation in the contracting muscles, peripheral resistance and consequently afterload are decresed.and so cardiac output increases. during exercise there is incresed sympathetic discharge so that myocardial contraction increases and heart rate increases.there will be more forceful contraction of heart
116440
All parts.\nCardio-vascular system, because it gets your heart rate up.\nStretches muscles in the legs, back, arms, torso, and neck.\n\nIt does not actually "target" any one group or area, if that helps.  It is a general warm-up exercise.
483322
Yes circulation is increased in trained athletes.  The blood also carries and delivers more oxygen to the cells
64546
to keep your heart pumping and the blood flowing.
172218
Relative oxygen consumption in human beings is usually expressed as VO2.  \n\nThe supply of oxygen is dictated by how often the heart beats, the volume of blood transported by every beat and the amount of oxygen in that blood. It is also dependent on how well the tissue or muscle extracts the oxygen (O2).\nCardiac output is the product of stroke volume and heart rate and is measured in milliliters per minute.  When you multiply this by the difference in oxygen concentration, you have the liters of O2 processed per minute.\n\nhttp://www.preventdisease.com/news/articles/vo2_max_how_fit_athlete.shtml
95500
During exercise, the quantity of blood pumped by the heart increases to match the increased skeletal muscle demand. Heart rate (HR) monitoring is a method commonly used to determine and assess exercise intensity levels. Exercise intensity is a key component of the training response. Therefore, it is important to understand the factors that can influence HR during exercise, so modifications can be made when establishing training heart rate (THR).
381308
Any exercise that gets your heart rate up is good for the cardiovascular system, if 100 is becoming easy increase the number.
977883
Because exercise IS good for your metabolic rate and your digestion. Its a good thing you have to go to the loo right after eating, it means all the blood is flowing around your system and this has been stimulated from the exercise. You have nothing to worry about - you are right on track!
121549
because the heart pumps the blood round your body which transports all the things you need to live (like oxygen and glucose). In an unhealthy heart this doesn't work as well so parts of your body aren't supplied properly.
1009759
Increased blood flow...?
1155223
Got to increase your VO2 Max, that is, the volume of oxygen your body can process in a given time.  When you're out training, switch back and forth between a steady pace and brief spurts of very fast running.  The trick is to keep your heart rate at about 90% of max.  Only do this if you're already in decent shape.
804419
My best knowledge would be excitment, which gives a boost of adrenaline, causing the heart to have to pump harder due to the adrenaline rush, causing it to sometimes skip a beat.
885495
Your heart is not controlled by sound.  If you hear a particular sound and your brain interprets it in a way that makes you stressed or excited, your heart rate may go up.\n\nAn example of this would be hearing a siren right behind you when you are driving - that will make most people's heart rate increase.\n\nHeart rate is controlled by your sympathetic nervous system.
38647
Your heart beat rises when you start having to work harder to get oxygen to your blood.  The better shape you're in, the faster we can begin to get oxygen after we stop exercising.  As the oxygen returns, your heart can slow down.
67467
No.  The heart is just a muscle.  If you exercise, it beats more, but gets stronger and lasts longer.
931027
Your heart heart has to pump harder to go the distance \nto your legs, which also are larger and burn more oxygen\nbut the difference is small.
659493
body needs more oxygen(in blood) to provide energy for the excercise, excitement etc.