A seemingly healthy and electrolyte-filled 20-ounce sports beverages can often pack in around 34 grams of sugar. Ask yourself if the elixir's really needed to sustain your workout. If it’s not, it'll just add empty calories, which is counterproductive to creating the calorie deficit you need for weight loss. For workouts lasting longer than an hour, use sports drinks in moderation. When your workout clocks in at under 60 minutes, stick to good ol' H2O.