Well for starters, a weight loss diet or a weight loss program have three things in common. They all have a beginning, middle, and end point.If one is exercising vigorously, such as at a marathon momen trim keto or triathlon, then it is very important to fuel and refuel the body properly before and after each exercise session. In order for one to work hard and put in all of his/her effort into the workout to burn as many calories as possible, there needs to be fuel (food) in the body before starting the workout. Thus a pre-workout meal is very important in the weight loss process.