"Nutrition is obviously an important aspect of any players game. The following, used at the Swindon Academy, will hopefully give you a further insight into this important subject.
Question: Why are carbohydrates important to an active footballer? Give examples of the percentage required in the diet and the foods high in carbohydrate.
The average person has about 2000 calories of stored carbohydrate.
An overnight fast (8 to12hrs) and a low-carbohydrate diet can dramatically lower these stores. More importantly, a carbohydrate-rich diet can more than double them. The body's upper limit for carbohydrate storage equates to about 15 grams per kilogram (2.2lbs) of bodyweight. So an 80kg (175lb) person can potentially store up to 1200 grams of carbohydrate or 4800 calories worth of energy - all with just a few dietary modifications. Weight for weight carbohydrates contain the least amount of energy out of the three macronutrients. Yet they are the most important type of fuel to a soccer player. During short, intense bouts of exercise (like sprinting), carbohydrate is the only fuel capable of supplying the body with energy quickly enough. In the first few minutes of any activity, it is carbohydrate that almost exclusively meets energy demands. In addition, the ability to repeat a sprint at the end of a game to the same high level as at the start of the game relies, in part, on the body’s carbohydrate stores. The average Western Diet consists of a carbohydrate/fat/protein average of 46%/ 38%/ 16% whereas
the ideal footballer ratios are 60%/ 25%/ 15%"
http://www.raf.mod.uk/raffootball/teamsanddisciplines/coaching_nutrition.cfm
______________________
So if the player cannot eat from dawn till dusk, and combining the fact that he basically fasts during sleep as well, he will be extremely short on carbs. This cannot in any way be healthy for a footballer.