Dr. G. John Mullen , DPT, CSCS is the founder of Center for Optimal Restoration . A former collegiate and national-level swimmer, he graduated with a Doctorate in Physical Therapy from the University of Southern California in 2010. He is a highly prolific writer for the aquatic community and is widely experienced with a specialty focus in sports (ranging from Professional to Master’s athletes) and chronic pain. At USC, he worked on projects regarding physical activity and type II diabetes in Hispanic boys and lung adaptations in swimmers. He was also a coach at Southern California Aquatic Club ( SCAQ )