pre workout supplement

Hi,

I was wondering if there are others on here that have Mitral Valve Prolapse but also take a pre workout supplement to get them moving in the gym. I get up at 430 in the mornings to head to the gym and really could use a boost. I have seen quiet a bit about Genetx pump but didn't know if anyone has tried it. The only stimulant I can see in it is 150 mg of caffeine, which so far my coffee has not affected me while managing my MVP. Any information would be grateful.

Thanks