“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. Unless you want your sweat sesh to turn into a struggle-fest, hydrating before a workout is clutch.
But what you put in your body pre-workout definitely matters. According to Columbia University, you’re supposed to drink 20 ounces of water two hours before a workout, another eight ounces during warm-up, and an additional eight ounces every 10 to 20 minutes depending on the amount of sweat you’re producing. That’s a lot of liquid—so you best be sure you’re sipping the right stuff.
Here what you should never chug before a workout.