I am a 65 year old shop teacher in Hawaii, as you can well imagine, it is a very physically demanding job. By the end of classes, I am drained. Usually, uI drink a large sugar free Monster or a 20 oz. Gatorade at the end of the day and they seem to help. I also drink a lot of water through out the day, the problem arises in that I've been told by other teachers that these energy drinks are very bad for me. I do have some other health issues like a heart arrithemia , border line hypertisive and diabetic, and I have an occasional bout with gout. So, are these energy drinks beneficial and would a male supplement (testosterone replacement) help with my stamina issues ? Aloha, Art