I am a CSCS. Certified strength and conditioning specialist. It's a national cert. provided by the NSCA. It's a fairly tough test. and you can sort of consider it like a fitness specialist - not like the know-nothing trainers at the gym - this includes REAL knowledge of how to improve athletic performance and includes nutritonal aspects as well.
requirements are at:
http://www.nsca-cc.org/
Why do you ask?