My friends have been using thermogenic supplements, and they claim to have higher vigor when in the gym. They even claim to use thermogenics on a PR day. I'm thinking of buying thermogenics for this reason, but not before I get some feedback on how thermogenics affected your strength levels.
BTW, there are no Biotest supps here in the Philippines, so HRX is out of my list. My top choice right now is Unidyne. Still, I'd like to hear how HRX or Unidyne or any other thermogenic stuff helped you gain strength.