Found this great site from the US - www.organicathlete.org
Members of OrganicAthlete's Pro-Activist Team are elite and professional athletes from many different sports who live and support a vegan diet and lifestyle. They're using their collective voice to champion the benefits of a healthy plant-based diet for athletes of all ages and abilities. Whilst I'm not saying that you need to be vegan (I don't think I could ever do it!), the website clearly takes a look at some of the trickier issues with getting a balanced diet from organic vegan sources.
Well worth a look around... saves me duplicating too much of it!