I just started running. When I run long distances (8 miles) near the end I feel lightheaded and dizzy. Why?
968427
Because oxygen is rapidly being used to keep your body going,and less of the oxygen gets to your head as usual.
997605
are you eating properly.  Honestly when your hungry you get dizzy, and headaches.  Then when you eat after fasting for a while it really will "run" right through you.  It could be hundred of diffent things, even stress, so only you know how bad it is go to your doctor if it alarms you further. good luck
1167943
I don't exactly understand your question..... but from what I do understand it sounds like you need eat protien bars or shakes before you run. Also don't dehydrate youself, drink lots of water.
714722
There's so many things that can cause dizziness.  I got new glasses one time and was dizzy for a while because the perscription wasn't right.  You could have a lot of stress too, which can make you dizzy.  Some people feel a slight buzz in their head, usually shooting straight back from your forehead along the sides of your head.  You could also have an ear wax build up.  Since you had those other tests ruled out, you might also ask your doctor about Lyme's Disease, depending on where you live.  You can get it anywhere, but it's really uncommon in some parts.  I live in Pennsylvania, and it's a lot more prevalent here, and one of the symptoms is dizziness.  Either way, don't give up.  It's hard going back into the doctor's office time and time again.
786754
You may be pushing too hard. Do you eat before you run? That can be a factor as well
775384
amoxicllin makes me feel worse than being sick.  is it a sinus infection? they are the worst.  just wait til you feel up to running.  and be prepared to stop quickly if you feel like it too.  no need to push it that much.
1053095
When you are walking, your muscles have gotten used to contracting and flexing just a set amount, to support your weight. When you transition into running again, those muscles have to support your weight while contracting and flexing while propelling you from one step to the next. Your muscles were used to a certain amount of oxygen from the walking, but running makes the muscles use more oxygen. This quick transition will leave your muscles feeling a little tired at the beginning, but once you start breathing well enough for running and your muscles are warmed up again, you should be better. \nGood luck! If you have any other questions, don't hesitate to ask!
325765
It sounds like it may be migraine associated dizziness. It is not uncommon for people who have migraines to experience dizziness along with them.
828837
This sensation can be caused by a broad range of conditions... anemia, low blood pressure, head trauma, etc. Sounds like yours is a lingering symptom of an inner ear infection or fluid on the ear drum. Do you hear a garbling of words when around LOUD noise?\nIf the light headed-off balance sensation is a chronic symptom, I would recommend contacting your physician and seeing if they can find & treat the cause. It may be as simple to alleviate as taking a series of antibiotics &/or decongestants to dry up the fluid that is impairing your equilibrium.
1088680
medication and/or blood loss, external or internal. If that is your blood pressure, you must be feeling very tired and light headed. See a doctor.
889515
it might be a sinus problem, or sinus infection, or ear infection, or swollen lymph nodes caused by another infection,,i suggest you see a dr,  and even consider going to an emergency room, all of those symtoms combined together really dont fit into any one problem that i know of , i would be especially concerned about the numbness and dizziness
573694
Well lets ee... everyone starts off not doing so hot in track and the gradually their times decrease and distance grow....if you are doing the high hurdles, the high jump and the shot could be taking some of your energy... or you could practice harder and gain endurance... alway practice one race over what you actually run and you will feel energized! In the hurdles make sure to come out strong, attack, and get low...the 800 also takes endurans.. well i'm sleepy so buh bye
1017203
The most common reason for lightheadedness when you sit up or stand up is that not enough time was allowed for the blood to reach your head.  The next question though, is why are you feeling that way now and maybe your weren't before.  Things to consider are whether you started any new medications recently, suffered any injuries, have gone through any dramatic life changes, etc.  If it persists, then I believe conventional wisdom would be to consult with your family physician.  As a safety measure, when you suddenly sit up....pause for a few seconds before actually standing up and walking.  Give blood a chance to get circulating.
1113872
I used to have the same problem while I ran cross country. I went from running 2 mile races to 5 mile work outs to prepare for state championship. It took me a while to finally master it but, as long as you run two miles a day without stopping it will get easier and easier. Every day run a little bit more. Then, try speed walking for the next two miles for a "cool down". If this fails, doutful, than try jogging 4 miles VERY SLOWLY--- go at your own pace. Don't get fustrated if it hurts and takes a while. That is natural. Best wishes!
952935
You should be OK, listen to your body you may want to cut it a little shorter than 18 miles.If you have been running you really should be OK\n\nPS you might want to ask this question in Diet and Fitness. Most of us runners seem to be there more often than sports.
547892
It has a lot to do with your breathing (make sure you take deep enough breaths) and not stretching enough or eating too much before you run.
298699
light headedness is most often caused by low blood sugars, and anemia. If you feel better when you eat it might be your blood sugars. If it's anemia you'd have to take iron pills for a while.\n\nThe best bet is to go to the doctor and have a blood test.