5 Things You Should Avoid Drinking Before a Workout 

Hydrating the right way before a workout helps your muscles operate at prime condition.  “When your body is dehydrated, you don’t have the proper muscle power, accuracy, and balance you need to complete a decent workout,” says Angela Onsgard, R.D., resident nutritionist at Miraval Resort & Spa in Tucson, Arizona.
MILK-BASED ENERGY DRINKS

SUGARY FRUIT DRINKS

BOOZE

CARBONATED BEVERAGES

SPORTS DRINKS

Source: 5 Things You Should Avoid Drinking Before a Workout : Milk-based energy drinks | Men’s Health