fainting during exertion

[ontolome]

Hi, I fainted after playing tennis for about 5-10 minutes. This happened to me years ago while working out in a gym.

I haven't done any strenuous exercise in years-- I walk instead of driving, but I am otherwise very sedentary. I am a slender 23 year old female. I have no history of illness.
The only possibly related anomalies I have experienced are vasovagal syncope after blood tests, injections etc. And my lips turn blue when it is cold or when I visit a (non-pressurized) place at very high altitude. My legs fall alseep often.
Was the fainting simply due to being out of shape? or is it likely that I have a heart problem? None was ever detected during childhood checkups.

I would be very grateful to hear your opinion on the matter.

[Mom2four85]

you should mention a tilt table test to your dr to rule out anything cardiac related and for them to see if they can figure out what's going on as well as doing a full cardiac workup with an EKG, Stress test and echo

[ontolome]

not often, no. i have only experienced a weird-feeling heartbeat a couple of times in my life.

[r9c]

Any time you fainted plz make sure u seek medical attention and do not take the risk,u mentioned ur last check up was in ur child hod time so its been a long time since then so its better you go for a full cardiac testing

[CMoore416]

Do you feel your beating irregularly?