The only real energy drink I've had is pre-workout, which gave me a good smooth ride throughout my training and also helped on none training days when I was crawling to get to the end of the day.

I'm out of Pre-workout but still training hard. However, I had a couple of really long days where by the end (I teach privately) I felt sorry for the kids I was teaching because mentally and physically I was exhausted. So, I decided to pound back a Monster Energy Zero.

I don't know if it was a placebo effect or if it worked, but I got through the last couple of hours focused. Are there drinks that definitely work? Are there ones to stay away from. I only plan on using them during working hours towards the end of the day when I need that extra boost.