I am 45 years old, been training off and on for 20 years. In the last couple years I have been having Fatigue that I have never experienced before, I recently went to my PCP and told him about the way I am feeling. It has got to the point that when I do a set and rack the weight my heart is racing and I feel dizzy and way out of breath, more so that normal.. My PCP put a heart monitor on me and had me go workout, so he could see what my heart was doing under a load, he called me at home after I took it back and he read it. He said my heart was pausing and I need to see a heart specialist about my Arrythemia. I went on 1/9/12 and he told me when I lift I am activating my Vagal Nerve, which when activated it slows my heartrate and lowers my blood pressure quite a bit. He said this is what I am experiencing in the Gym and I need to stop lifting immediately, he ordered a heart monitor for me to wear for two weeks to see exactly what my heart is doing 24 hrs. a day. He said it was ok for me to do cardio, but to not lift anything over 50 lbs. This has been a HUGE blow for me personally, because like alot of us here at AM, lifting is my Antidepressant and what has got me through alot of things in life. I am throwing this out to everyone here to see if anyone can offer any advice or experience with this condition.. I have googled quite a bit about this , but have yet to find a cure or treatment.