I love to hit it and then do an hour of yoga or half an hour of dancing . Best feeling there is and I ' m doing it in the next hour . Good times ! <| sep |> Idk that ' s a pretty loaded question . Obviously , most stimulants have the ability to cause Tachycardia as well as other pathologies related to the Circulatory System , but I find my self asking a question there myself If it ' s bad for the circulatory system isn ' t it also bad for the brain ? The heart will heal , and the brain has shown to regenerate as well and be adaptable , but how do you quantify cardiotoxicity to neurotoxicity in relation to each other , and say one is less or more important than each other unless one is causing irreversible problems . I ' m not sure modern medicine even knows the amount of changes that happen in the brain due to drug use , so what we can see based off what we know and what may be happening is kind of a gray area that hopefully the human brain project will shed light on . I ' m personally more afraid of losing a % of my neurons taking a drug than I am worrying about my heart , even though both are important . You can at least watch for signs of cardiotoxicity like Tachycardia , and know you ' re dosage is too high , but if something is neurotoxic you may feel like you ' re having the time of your life like meth addiction .