According to the US Food and Drug Administration , "Piracetam is not a vitamin, mineral, amino acid, herb or other botanical, or dietary substance for use by man to supplement the diet by increasing the total dietary intake. Further, piracetam is not a concentrate, metabolite, constituent, extract or combination of any such dietary ingredient. [...] Accordingly, these products are drugs, under section 201(g)(1)(C) of the Act, 21 . § 321(g)(1)(C), because they are not foods and they are intended to affect the structure or any function of the body. Moreover, these products are new drugs as defined by section 201(p) of the Act, 21 . § 321(p), because they are not generally recognized as safe and effective for use under the conditions prescribed, recommended, or suggested in their labeling." 
If you are looking to put size on try a program called P90X. The program is very intense and even caters towards athletics. Cuation, this program is extreme but works wonders…I started at 175 lbs and 22% body fat at 5’″ at 26yrs old and know down to 17% body fat after only 3 months. They even suggest what foods to eat and how much depending on what you want to do. The programs are brole down into toning, weight lose, and building muscle mass. The program is a little high priced but real worth it. I take creatine with my workout and seemed to do wonders. As far as speciallized workout for football, I have a very close friend who has been a varsity coach for 10+ years and said he has never seen anything like this program…….he started making his players do it in the off season and plans to set something up for summer workouts…..trust me, this program will give you great results!!!