Stretching is essential for a good workout!

I highly recommend this book!

Charles Poliquin is a Canadian strength training coach who has trained and/or consulted numerous world class athletes and professional sports teams.

The International Sports Sciences Association is an organization that operates as a teaching institution and certification agency for fitness trainers, athletic trainers, aerobic instructors, and medical professionals.

John Berardi is the mastermind behind Precision Nutrition, such an amazing Nutrition Course for Athletic trainers. http://www.precisionnutrition.com