In 1980, Feltz joined the Department of Kinesiology at Michigan State University (MSU) as an assistant professor, specializing in sport psychology.[2] By 1984, she earned an adjunct position in the Department of Psychology and became an associate professor. Her research primarily focused on self-efficacy, anxiety, and their impacts on sport performance, including the psychological effects of youth sports.[2]
Her early work included studying self-efficacy in high-avoidance motor tasks, published extensively in refereed journals such as the Journal of Sport Psychology and Research Quarterly for Exercise and Sport.[2] Her 1981 dissertation received the outstanding dissertation award from the Sport Psychology Academy of the National Association of Sport and Physical Education (NASPE). In 1985, Feltz was awarded the early career distinguished scholar award from the North American Society for the Psychology of Sport and Physical Activity.[2]
In 1989, Feltz became a professor and chairperson of the Department of Kinesiology at MSU, a role she held for 17 years. During that same year, she was named a fellow of the American Psychological Association (APA) in Division 47, exercise and sport psychology.[2] Her administrative contributions included overseeing program expansions and developing the undergraduate specialization in athletic training. She facilitated partnerships with Lansing Community College and established a student exchange program with the College of Ripon and York St John. In 1990, Feltz was listed as a classic author in the Journal of Sport and Exercise Psychology.[2]
In 1992, Feltz was inducted into the American Academy of Kinesiology and Physical Education.[2] Feltz investigated collective efficacy and coaching efficacy, developing models and measurement tools that became widely adopted.[2] Her research includes collaborative projects such as the Center for Physical Activity and Health, launched in 2003 with MSU's Department of Epidemiology.[2] Feltz co-developed the Coaching Efficacy Scale-II and collaborated with researchers, including Sandra E. Short, Philip Sullivan, and Melissa Chase, on collective efficacy and sport confidence studies, furthering research on gender differences, athletic performance, and team dynamics in sports. Feltz received the MSU distinguished faculty award in 1992 and served on the Committee on Techniques for the Enhancement of Human Performance with the National Research Council from 1991 to 1993.[2]