Best Pre-Workout

Eating a bar with roughly 35 to 45 grams of carbs an hour before a cardio or strength workout can help boost energy. But check labels closely, says sports nutritionist Dr. Suzanne Nelson, and drop those with more than 4 grams of fat, 10 grams of protein, or 5 grams of fiber, all of which can slow digestion.

Winner: Skout Blueberry + Almond Trailbar has 32 grams of carbs and tastes like a Fig Newton. It's high in sugar you need, but gets it only from real fruit.