23 years
Each time I start sports like Jogging , after 5-10 mins I got dazzy , my heart is ok everything is ok in my blood , but my friend mention that it might be caused by less of oxigen in my head ,true ?
Aug 19, 2014
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First you need to distinguish between dizziness and vertigo: Are these episodes of dizziness (you feel you are dizzy) or vertigo (you feel your environment is spinning)?The most common causes of dizziness are:
1- vasovagal or neurocardiogenic: the blood running in the veins, going from the legs and back into the heart can be decreased by increased pressure in the chest (like with straining or coughing), increased vagal tone (the vagus nerve, when excited, can affect consciousness), and loss of sympathetic tone (the sympathetic branch of the nervous system partially controls heart rate and blood vessel contractions or tone. Sometimes, this systems does not function well and does not increase blood pressure as needed in exercise to meed the increased oxygen demands by organs, so you get dizzy). Syncope involving these mechanisms is often termed and is common and benign. You will notice that if you rise from a sitting/lying position, you get dizzy - this can be confirmed at the doctor's office by measuring your blood pressure when lying down , then 1 min after you've sat up, then again 1 mon after you've stood up. If your blood pressure (the upper value) drops by more than 10, then this is the diagnosis.
2- Idiopathic: there is no known explanation for it.
Hyperventilation may also produce these symptoms: when you breathe too fast, calcium in your blood goes into the cells and is not available for the muscles, so you get dizzy, feel numbness and get muscle cramps.
Things to worry about are a cardiac problem, or a drop in blood sugar.
Symptoms that suggest a heart problem (especially if there is positive family history of heart disease at young age, or sudden collapse and death in an otherwise healthy young individual) are:
Do you have associated shortness of breath, chest pain, or palpitations (heart rate faster than expected after only few minutes of starting to work out)? Have you ever had an episode of loss of consciousness (fainting), syncope (a sudden, brief loss of consciousness with loss of postural tone _stumbling down- followed by spontaneous resumption of consciousness) or near-syncope (light-headedness and a sense of an impending faint without losing consciousness)?
If you are worried about any of these, get a basic heart tracing (electrocardiogram).
Vertigo (room spinning) is due to inner ear problems and can be easily treated by a special maneuver at the doctor's office.
1- vasovagal or neurocardiogenic: the blood running in the veins, going from the legs and back into the heart can be decreased by increased pressure in the chest (like with straining or coughing), increased vagal tone (the vagus nerve, when excited, can affect consciousness), and loss of sympathetic tone (the sympathetic branch of the nervous system partially controls heart rate and blood vessel contractions or tone. Sometimes, this systems does not function well and does not increase blood pressure as needed in exercise to meed the increased oxygen demands by organs, so you get dizzy). Syncope involving these mechanisms is often termed and is common and benign. You will notice that if you rise from a sitting/lying position, you get dizzy - this can be confirmed at the doctor's office by measuring your blood pressure when lying down , then 1 min after you've sat up, then again 1 mon after you've stood up. If your blood pressure (the upper value) drops by more than 10, then this is the diagnosis.
2- Idiopathic: there is no known explanation for it.
Hyperventilation may also produce these symptoms: when you breathe too fast, calcium in your blood goes into the cells and is not available for the muscles, so you get dizzy, feel numbness and get muscle cramps.
Things to worry about are a cardiac problem, or a drop in blood sugar.
Symptoms that suggest a heart problem (especially if there is positive family history of heart disease at young age, or sudden collapse and death in an otherwise healthy young individual) are:
Do you have associated shortness of breath, chest pain, or palpitations (heart rate faster than expected after only few minutes of starting to work out)? Have you ever had an episode of loss of consciousness (fainting), syncope (a sudden, brief loss of consciousness with loss of postural tone _stumbling down- followed by spontaneous resumption of consciousness) or near-syncope (light-headedness and a sense of an impending faint without losing consciousness)?
If you are worried about any of these, get a basic heart tracing (electrocardiogram).
Vertigo (room spinning) is due to inner ear problems and can be easily treated by a special maneuver at the doctor's office.
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