So we all know the importance of the pre-workout meal. Well, maybe I'm jumping the gun. I should say that I hope we all know the importance of the pre-workout meal.And I should qualify the position I'm coming from on this topic. This is based upon training for performance and athletic excellence. The reason I make the distinction is that there is a growing movement and popularity for intermittent fasting when it comes to weight loss and body composition changes. I'm not referring to this type of goal.When it comes to pre-workout nutrition for a performance goal wer're looking to hydrate and top up the body's supply of glycogen. Glycogen is the body's stored form of carbohydrate which can be found in the muscle and liver. If we have some carbs before training this can help 'spare' muscle glycogen or minimize the depletion of this energy source.And while carbs are our best source to accomplish this we want to make sure to keep the pre-workout levels of fats and protein a little lower. This may seem contrary to what you'll see many 'meat heads' doing as they suck on a protein shake while warming up on the treadmill. Don't follow this lead. Too much protein slows gastric emptying and impairs performance.But while we hear all the time how important it is to eat before training, how important is it really? How much does it impact your performance? Can one meal really make a difference?Consider the following session I had with a client this week. This client wears a heart rate monitor while training and of course we are monitoring loads, recovery times and outputs on energy system work. And for this particular workout the client had not had a pre-workout meal.Here's what happened.When we got to some of the conditioning sets...