Why does cardiac output double and blood flow to muscles go up durring exercise?
539604
as you move your muscles, they burn oxygen...blod flow increases to muscled to replace this lost oxygen...
475696
blood doesn't need gravity to flow through your body.  The heart pumps it and the veins and arteries have valves which keep it going in the correct direction (ie no back flow).
495205
The heart is a muscle.Like most muscles in the body they need to be excercised regularily to perform at optimum levels.Lack of excercise combined with poor diet may lead to heart disease.As well the vascular system is basically the system that gets "sick" you get build up on the inside of your arteries that in turn increases your blood pressure.which in turn can put you at risk for all sorts of things like strokes and aneurisms.your heart needs to be fed as well and this is done by a series or blood vessel connected to the heart.If they become blocked you may have a heart attack which basically kills the tissue being deprived of blood.Regular excercise and a healthy diet increase your chances of good heart health.
654478
FAT AND MUSCLE CELLS VARY IN COMPOSITION, AND 1 DOES NOT CONVERT TO THE OTHER. YOU CAN GET INCREASED BODY FAT AND DECREASED MUSCLE MASS IF YOU DONT EXERCISE LIKE YOU SHOULD.
347956
this i beleive is due to blood pressure that can come on suddely with physical activity, you really should have your blood pressur checked  because high blood pressur can have a bad toll on your heart
794556
Blood pressure should go up as the blood is pumping harder through your body when exercising, although if your head feels weird you might want to go easy, you might have a head cold or something coming. Youll find if you continue exercising your blood pressure goes down even if your working quite hard, this is a sign your fitness level is improving. Just take it at a comfortable pace for you and then build it up at a harder level when you feel its too easy. xx
759020
It is a part of stress response. your body diverts blood flow to the brain/musculoskeletal syatems for "fight or flight". The body's digestive, elimination and reproductive systems are a low priority for stimulation/metabolic activity because the body is focused on survival.
805589
The increased heart rate will maintain the cardiac output, not the BP.  \n\nThe blood pressure will be maintained by increased sympathetic tone, leading to vasoconstriction.  Sympathetic tone is increased by endogenous catecholamines (adrenalin/epinephrine)
1020074
thats what would happen in a healthy individual because of peripheral vasodilatation.\n\nin sick people the vessels arent as elastic so the heart rate goes up, and the vessels calibre stays the same so their pressure goes up.
252684
Your body requires more oxigen as you exercise (to oxigenate muscles while they perform their work), thus your heart pumps faster to get blood circulating faster and which also requires your lungs to bring in more oxigen to your blood.
67467
No.  The heart is just a muscle.  If you exercise, it beats more, but gets stronger and lasts longer.
534536
EVERYONE SWEATS A DIFFERENT AMOUNT DURING EXERCISE. SWEATING VERY LITTLE MAY BE NORMAL FOR SOME PEOPLE. A BETTER SIGN THAT ITS A GOOD WORK OUT IS IF YOU FIND TALKING AS YOU EXERCISE A LITTLE DIFFICULT, THEN YOUR GETTING A HEART PUMPING, MUSCLE BUILDING WORK OUT.
315055
Yes they do; the more you exercise, the more efficient your pulmonary and cardiovascular systems become, which leads to a greater VO2 Max, or greater lung capacity.
380707
Simply, riding at a fairly constant rate causes the bodies' heart rate, oxygen intake and blood flow to increase, thereby improving your general (aerobic - with oxygen)cardiovascular fitness level. The leg muscles, primarily the quadriceps and calf muscles, also get a work out. Of course, the more resistance you place on the pedalling, the harder you work, and the effects on your body are greater. As you ride, your body also burns calories...the longer the ride, the more calories burned. This, of course, can be important in weight management. Hope this helps.
337565
muscle that pumps blood
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.
532455
When you excercise the blood supply to your muscles increases, causing a visible increase in size. This will subside in about half an hour.