Gray Cook is a practicing physical therapist and Orthopedic Certified Specialist (OCS). He is also a certified strength and conditioning specialist and kettlebell instructor. Cook is the founder of Functional Movement Systems which promotes the concept of movement pattern screening and assessment. In his book “Movement,” Cook explains the importance of mapping out movement patterns and developing a better understanding of how movement is learned, maintained, and restored. Cook’s work cuts to the core of problems like low back pain, obesity, and the general physical decline of a modern culture.