Gray Cook, MSPT, OCS, CSCS, is a practicing physical therapist and orthopedic-certified specialist, and is certified as a strength and conditioning specialist, as an Olympic weightlifting coach and as a kettlebell instructor. The founder of Functional Movement Systems, Cook lectures extensively on the concept of movement pattern screening and assessment. His work and ideas are at the forefront of fitness, conditioning, injury prevention and rehabilitation. His first book, Athletic Body in Balance, continues to be a bestseller, and his lecture and workshop instructional DVDs are leaders in the