Heart & Cardiology/Light Headed after laborious activities
Hi Dr. Richardson,
I'm 40. Often when I get my heart rate going through labor around the house, or elsewhere (not labor as in L&D), I will get light headed. I run 5 times a week, usually about 2-3 miles a day. I don't notice it at all during my runs. Today for example I was working the Xmas tree--hardly a strenous activity. Yet it was just enough to accelerate my HR a little. Then the sensation hit--eyes felt heavy and I get light headed/floaty feeling. It slowly subsides after 15-30 minutes.
1- Does this sound heart related.
2- If not, do you have any idea, as an MD, what's causing this?
All my life this has never happened, but it's been on ongoing thing for about 6 months now. It won't happen every time I do laborious activities, but it will occur semi often.
3- Is it possible it's related to general fatigue from either lack of good sleep or over exercise?
Light headedness can be caused by overbreathing, by low blood pressure, by very fast heart rates or very slow heart rates. Your heart rate seems to be okay. Pay attention to your breathing and breathe slowly and shallowly. If necessary, breathe through a tube about 12 inches long and 1 inch in diameter. If you're standing when lightheaded, get your blood pressure measured while sitting and then while standing quietly for 1,3 and 5 minutes. If BP gets below 90, that's the cause of you giddiness. Eat lots of salt and drink lots of water.
Please write back if this doesn’t answer all your questions.