Remember: once your glycogen stores are full, adding further carbohydrates without the sets and reps required to burn them up will only result in a burgeoning waistline. Forget fancy diets. If you are finding it hard to lose unwanted weight, along with adopting a basic higher protein and complex carbohydrate (at least 35 and 45 percent of your daily caloric intake respectively), lower fat (around 20 percent) diet, simply eliminate carbohydrate consumption in the evening.
So how does all of this relate to fat loss or weight loss? Initially, during aerobic exercise, glycogen is used. But, in its absence or when the activity lasts a long time, fat metabolism is initiated and fat is broken down to be turned into ATP. Generally, a workout performed at a moderately high level of intensity over a long period of time will use fats for energy. But, research also shows that HIIT can activate fat metabolism as well.