You Skip Your Morning Oatmeal
Many women skip breakfast before their morning workout to either save calories or to prevent digestive upset. Eating first thing not only boosts your metabolism, but it also gives you energy to get through your solid calorie-burning workout. Without the proper fuel, you'll end up with a headache or dizzy spell and are more likely to not push yourself as hard, or worse — to throw in the towel before your workout is complete.
Since devouring an enormous plate of scrambled eggs, bacon, pancakes, and hash browns is also a bad idea, fuel your workout with something small that contains easily digestible carbs and protein (like these pre-workout snacks).