I dont do MMA but Ive been training BJJ for 25 years. In my early days I never liked training after vaping. Even now, because I teach usually before I train I need a clear head. But when we do our competition training, so hard stand up to ground training (and I dont teach beforehand), I hit my vape. I have to tell you Im more relaxed and I see things so much clearer. also Im more creative and have more fun. I wish i could do it before every training session.