its for people who depend on sugar and caffeine to get energy for their workouts, instead of eating a proper pre workout meal.
it is like running your car on fumes vs. putting in high octane gasoline. seems to be the younger dudes who started this nonsense following zyzz and the like. of course your heart and body becomes so weak that you can barely stand up
I will say this works very well for getting 'ripped and weak' as I call it. however long term not only will you develop an addiction where you cannot do any sort of physical activity without the stimulants, but you also will age quicker from the lack of sleep and recovery you are getting .. and it becomes counter productive. remember to achieve stage 3 or 4 sleep you MUST not have stimulants in your system. that stage of sleep is the ONLY stage where you actually repair at the cellular level. so essentially this means you recover less fast and over time it adds up. this means less strength and less muscle
best thing to do is throw out your pre workouts, and stick to eating a healthy pre workout meal like sweet potato, rice, maybe some baked chicken/fish, and a piece of fruit. if you are centered around cardio then eat 2 hours beforehand so you do not throw up
the funny thing these ripped up 25 year old guru's on youtube giving advice always tell you to eat 6 meals a day, hit your macro's etc. yet in reality they themselves might eat 1 or 2 meals a day and are just on stims all day. talk about hypocrisy! they don't even follow them own advice. we will see where they are in 10 years, either dead or on harder drugs cause their addiction
PS. caffeine also inhibits GABA... that's why you see caffeine addicts are nervous wrecks and shaky and high strung all the time. and the dirty secret is as you age GABA will drop so the effects of caffeine abuse will become worse over time. not good.. no wonder people are so stressed and unable to sleep in todays society
if you are going to abuse caffeine, you better be taking GABA will it to offset it