1. Alcohol, Don’t drink booze before exercise, even if it’s in moderation. Alcohol dehydrates you and messes up your balance. It also impairs your decision making and promotes inflammation. Put those together and you’re more likely to overstretch yourself, get hurt, and have a harder time recovering. You also smell like beer in the gym. Not a good look.
2. Dairy Drinks, If you like any health drinks that have dairy in them, save them for after you work out. They contain a lot of protein, carbs and fat, which take a while to digest. They can also make you gassy. Farting in the gym is almost as bad as dropping the bar from the top of a deadlift.
3. Fruit Drinks,Most fruit-flavored drinks, even the “natural” ones, are loaded with sugar. And most of that sugar is in the form of high-fructose corn syrup. Your fruit drink might be okay – just check the label. If it’s sugary, skip it. Or at least save it until after your workout. Good alternatives are water with fresh fruits added for flavor, or coconut water.