Heart wobbles beats

I am a 30 year old male that runs all the time. Just a few months ago i started to feel my heart skipping a beat mabey once a week then fijnally last week a big "off rythem" beat that lasted about 5 seconds. No pain when i run or exercise,I have also recently done a stress test along with a EKG that was normal. Now i just started running hard in the beggining of 2008 year ,and have not run at all in over 10 + years before this( only weight lift). Anyway I dont like this and can this be caused by pushing myself to hard, Or not enough exercise? Or a possible bad upcoming problem?

[Jerry_NJ]

Any change in your body is worth checking on.  As your recent heart check-up passed, you may want to try a reduction in running intensity, or longer warm-up, cool-down and see if anything changes.

I do recommend you keep a "record" of your skipped beat experiences, write them down, time and description (develop your own short-hand code) so that you can accurately compare current with past and so you will know if a trend to worse is developing, that being the case discuss with you doctor.