When standing, blood pressure in your legs is greater than in your upper body.?
912824
Normally the systolic pressure in the legs is upto 20 mmHg higher than in the arms, but the diastolic pressures are virtually identical. \n\n\nTo be able to explore and work in space, humans have to take their environment with them because there is no atmosphere to supply the pressure and oxygen necessary to support life. Without sufficient atmospheric pressure, body fluids will start to heat up and boil. Without oxygen, we would be unable to breathe. \nThe parts of a spacesuit\n\nSpacesuits serve many functions. Today's spacesuits are pressurized, have an oxygen supply, protect the astronaut from micrometeoroid bombardment while spacewalking, and insulate the astronaut from the severe temperature changes experienced in space. The Space Shuttle astronauts have more than one "outfit" for space travel. What they wear while on a mission is determined by the job they are doing. During the launch and re-entry, the astronauts wear a partially pressurized suit and a parachute pack. The suit has a helmet, gloves, and boots which all serve as protection for the astronaut. Within the suit are bladders that automatically fill with air at reduced cabin pressures. At low pressure, the blood will pool in the lower body causing the astronaut to black out. The bladders maintain the pressure on the lower body to prevent this from happening. While working in the Shuttle during orbit, astronauts work in comfortable clothes such as knit shirts, pants, or flight suits. In addition, prior to each mission, flight crews are outfitted with lined jackets, sleep shorts, slippers, and underwear. \nWhile working outside of the Shuttle during a mission, astronauts wear an extravehicular mobility unit (EMU). This suit has interchangeable parts so it can be assembled to fit different astronauts. This makes the suit more cost effective since it can be reused. The EMU has a liquid cooling garment, which is a one piece suit made of spandex, and keeps the astronaut cool while in the suit. The unit also contains headphones and microphones, a drink bag which carries water, a life support system containing oxygen, and a urine collection device. Gloves are included with the unit along with a helmet and a visor. All of this is necessary to protect the astronaut from micrometeoroids, solar radiation, infrared radiation, temperature changes, pressure changes, and oxygen deprivation.
356224
when does this happen? after exercise the feeling could be associated with a heightening in blood pressure. If they throb, and ache, its a pretty good indication of a raise in blood pressure, or temperature change, (ie eating cold things, breathing cold air/ quickly) remember your teeth actually have nerves and some blood vessels in them.
172466
That's not an abnormal reaction.  Your blood pressure dropped suddenly as you stood, because blood tries to pool in your legs. This is usually stopped by nerves, which contract the veins in your legs ensuring that enough blood returns to your heart and that there is no reduction in the amount of blood that your heart pumps. This maintains the blood supply to your brain.\n\nHowever, if there is pooling of blood in your veins, less blood returns to your heart and less is pumped out which means a reduction in the amount of blood going to your brain. This causes symptoms of dizziness and some people may faint. \n\nIf you have low blood pressure and you also have symptoms of dizziness or faintness when standing up suddenly you should have your blood pressure checked, both when you are lying down and when you then stand up. This drop in blood pressure when you stand up is called orthostatic hypotension.\n\nSee this site http://www.merck.com/pubs/mmanual_ha/sec3/ch20/ch20b.html for an explanation of some possible causes of low blood pressure.
621556
You're right in saying low blood pressure. The average persons blood pressure is around 130 / 70, although this can vary dramatically, depending on your overall fitness, weight etc. The lightheadedness comes from your blood surging down to your feet when you stand up, resulting in a reduced pressure of blood to the main organs of the body.
620387
They say it is the spikes in blood pressure that are the most dangerous, rather than having steady hypertension.  Those spikes, caused by stress like your commute, put sudden stress on your heart.  So, measuring when you are unstressed can tell you what your bp should be, but measuring when it's high (seeing how much you spike) should be a red alert to learn to control stress better.
902514
the blood flow changes its direction in a handstand, due to which, the fresh blood rushes to your brain and that is good for mental health, this kinda shakes the blood in the whole body which is good for growth and entire health as a whole.\nthnx
8699
blood pressure, force exerted by the blood upon the walls of the arteries. The pressure in the arteries originates in the pumping action of the heart, and pressure waves can be felt at the wrist and at other points where arteries lie near the surface of the body (see pulse). Since the heart can pump blood into the large arteries more quickly than it can be absorbed and released by the tiny arterioles and capillaries, considerable inner pressure always exists in the arteries. The contraction of the heart (systole) causes the blood pressure to rise to its highest point, and relaxation of the heart (diastole) brings the pressure down to its lowest point.\nBlood pressure is strongest in the aorta, where the blood leaves the heart. It diminishes progressively in the smaller blood vessels and reaches its lowest point in the veins (see circulatory system). Blood pressure manifests itself dramatically when an artery is severed or pierced and the blood (under pressure) ejects in spurts.
803179
Changes in air pressure and possibly humidity.  Your body turns into a barometer.
1091244
this is called postural hypotension it is not considered  a  case by its own  but  it is  usually  a syptom of  some other illness like blood pressure hydration  bad  circulation certain  drugs  cause it ................  go seee your doctor
275636
always in your arm. Blood travels first to your arm from your lungs. Blood is oxygenated in your lungs. Therefore there is more pressure in blood near your lungs. The first places after lungs have hte most pressure. Then slowly it decreases. The legs get teh least pressure. When blood goes across capellaries and hte O2 is used up and the pressure is very low. It is lowest in veins since all oxygen has been used up. It is also lowest far away from the heart because the heart increases pressure.
535188
well high bp or hypertension could have several or no symptoms. When referring to you bp there will be a systolic/diastolic pressure at your age i would worry more about ur diastolic the difference between the two is as follows the systolic pressue is the pressure excerpted against ur arterial walls when ur heart contracts and diastolic is just opposite its the pressure when ur heart relaxes so its bad to have a high pressure when ur heart isn't working because it will be even higher when it does .And if u get red or light headed when u stand up or sit up it could actually mean ur dehydrated and u have a positive ortostatic bp rise when u stand up. however if u r really concerned about it i would check with ur doctor and see it could be controlled with diet or fluid in minor cases..hope it helps
73515
Leg Edema \nSwollen feet and legs, referred to medically as leg edema, occur when fluid is retained in the spaces between body cells. A leg edema typically affects the feet, ankles and lower legs, but can also impact any area of the body, causing systemic symptoms.
961850
I am not sure I understand, but from what you describe I am guessing your friend is becoming dizzy when standing up after being flat on his/her back or straining. It's not a disease.  It just means they are causing a rapid change in their blood pressure.
425715
I am a walker and my hands swell when I walk.  I believe it has something to do with gravity and the blood falling all towards the ground (when your hands are pointed downward)
320624
Artery blockage can cause high BP if blood backs up at the blockage, but it generally won't cause high BP if there's blockage just at one point. The problem is that many people with atherosclerosis (plaque buildup in the arteries) have it throughout their body, just to different degrees at different points. Atherosclerosis will result in high systolic BP (the top number of the blood pressure). Blood pressure is best treated by a combination of methods. Regular exercise (such as walking several times a week more than usual) and diet changes (eating less fatty and salty foods for example) may help blood pressure in addition to medication, but it's important to talk to your doctor about any possible changes to your blood pressure treatment.
466910
are you doing anything just before or during that makes them come on?  like standing up?  a lot of dizzy spells are from low blood preasure, especially when standing up (it's called orthostatic hypotension).  also it can come from low blood sugar.   so make sure you're not getting too hungry by snacking on fruits during the day and drink plenty of water.
520140
I'm guessing by moving your legs you're moving blood up to your brain.  \n\nSoldiers who stand at attention too long can faint, because there's no movement to get blood up to the brain.