In 2001 he underwent an extensive lumbar spine fusion. He brings a perspective as both professional and patient. He lives in Denver, Colorado. Jeff Falkel, Ph.D. P.T., is a physical therapist who has treated hundreds of patients with total knee replacements over the past 25 years. In 2000 Dr. Falkel had bilateral total knee arthroplasties performed simultaneously. He also is co-author of Sports-Vision: Training for Better Performance, to be published by Human Kinetics in 2003. He lives near Denver, Colorado.