Water still rules 99% of the time.

Taking energy drinks and sports drinks basically just provides your body with loads of sugar (or high fructose corn syrup). Many people drink these because they think it’s healthier than soda but some have MORE caffeine and sugar.  Others drink them because they think it will enhance their training routine or give them stamina by replacing necessary electrolytes or glucose.

There are much better ways to supply electrolytes and glucose to your system if you are truly working out to the point where you need them.

Read more here.