When you're stumbling around your kitchen at 5 a.m., it's hard to remember how many grams of carbs per kilogram you need to fuel that early-morning swim. (One gram of carb per kilogram of body weight, ...

You finish work, look at the clock, and have an hour before the gym. A huge dinner will sit badly. Going in hungry may make a hard session feel longer than it needs to. The practical answer is simple: ...