Matthew Klein, PT, DPT, PhD, OCS, GCS, SCS, FAAOMPT, is a physical therapist, researcher and assistant professor at George Fox University’s (GFU) Physical Therapy Program. He is the founder and chief editor of the website Doctors of Running, which is dedicated to educating runners and developers on footwear, running and injury prevention. He teaches Ortho Extremities/Spine, Prosthetics Orthotics and Gait and Modalities at GFU. He practices at GFU’s community clinic where he treats athletes from GFU and as a primary care physical therapist at Virginia Garcia. His research focuses on master’s runners, Achilles tendinopathy, return to running, and footwear.