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Exercise Physiology Faculty and Staff

Zac Callahan

Assistant Professor of Exercise Physiology

Zachary Callahan, assistant professor of exercise physiology, joined the Ohio Northern University family in 2015. Previously, he taught exercise physiology classes at Western Kentucky University (WKU) in Bowling Green, Ky., and anatomy and physiology courses in the biology department at Miami University in Oxford, Ohio.

After spending some time outside academia, Callahan received his undergraduate and master’s degrees in exercise science from WKU. His master’s thesis investigated the effect that varying cadence had on sub-maximal VO2 estimations of VO2 max. Basically, he was interested in seeing if the standard test (exercise bike) used to estimate a person’s maximal oxygen capacity could be improved by having the subject pedal at different RPMs. 

Callahan taught for two years at WKU before moving to Oxford to work on his Ph.D. at Miami University. At Miami, Callahan completed his doctoral thesis while investigating the effect that inactivity and high-fat diet had on the development of diabetes.

At ONU, Callahan teaches Introduction to Exercise and Health, Sport Nutrition, Advanced Exercise Testing and Assessment, Motor Learning, Kinesiology, and Anatomical Structure and Function.

Scott Swanson

Associate Professor of Exercise Physiology

Scott Swanson is an associate professor of exercise physiology at Ohio Northern University. From 1998-2001, he served a dual-teaching role in the Department of Biological Sciences and Allied Health and the Department of Human Performance and Sport Sciences, teaching anatomy and physiology as well exercise physiology. Swanson agreed to teach exclusively in the exercise physiology program in 2002; he also serves as that program's coordinator. 

Swanson completed his undergraduate degree from Alma College in Alma, Mich., with a major in biology and minor in chemistry. His undergraduate thesis examined pesticide levels and control in Tribolium Brevicornis. Swanson completed his master's degree in exercise physiology from Kent State University in Kent, Ohio, where his research focused on the role of protein metabolism during aerobic exercise. He completed his Ph.D. from Ohio State University. His doctoral thesis examined the effect of eccentric exercise muscle damage on muscle glycogen resynthesis.

At ONU, Swanson teaches Exercise Physiology, Exercise Testing and Prescription I/II, Exercise Biochemistry, and Introduction to Exercise and Health. He also coordinates the Exercise Physiology internships.

Ed Potkanowicz

Associate Professor of Exercise Physiology

Dr. Edward S. Potkanowicz arrived at Ohio Northern in 2011. In addition to his teaching and research responsibilities at ONU, Dr. Potkanowicz is responsible for the coordination and development of new clinical experiences.

Dr. Potkanowicz received his undergraduate degree in exercise science from Youngstown State University (Youngstown, Ohio). After stints at both the White House (Washington, D.C.) and the Cleveland Clinic Foundation (Cleveland, Ohio) where he served as an exercise specialist, Dr. Potkanowicz began his graduate work at Kent State University (Kent, Ohio) receiving both his master’s and doctorate degrees in 2002 and
2003, respectively.

Prior to his arrival at Ohio Northern, Dr. Potkanowicz served as a faculty member and graduate program coordinator at Northeastern Illinois University in Chicago from 2003 until 2006. From 2006 until 2011, Dr. Potkanowicz was on faculty in the exercise physiology program at Ohio University in Athens, Ohio. In 2011 Dr. Potkanowicz arrived at Ohio Northern and assumed his position in the exercise physiology program. Dr. Potkanowicz has two research agendas and has been fortunate enough to be able to combine them at times. The first is in the area of the physiology of aging, while the second is in the area of human thermoregulation and sports performance.

With regard to his interest in aging, Dr. Potkanowicz has, for a long time, had a desire to uncover and discover ways of improving the quality of life of the aging adult. It is Dr. Potkanowicz’s belief that, through the inclusion of regular physical activity, the aging adult can have a more fulfilling life experience and enjoy a much better quality of life.

His second research interest is in the area of human thermoregulation and sports performance. More specifically Dr. Potkanowicz examines the performance deficits that an athlete experiences while performing in extreme environments. His most current project is called “The R.A.C.E.R. Project”. This is an acronym for The Real Assessment of Core and Environmental Responses. The project has been examining the physiological responses exhibited by closed and open cockpit racecar drivers (i.e. Indy Car, Formula 1, and NASCAR). The project’s goal is to design a new biometric sensor that will allow for the real-time assessment of the driver’s physiological response to the microenvironment of the cockpit during actual race events.

Dr. Potkanowicz and his wife Deanna (a clinical psychologist and full time faculty member in Psychology at Bluffton University in Bluffton, Ohio) are regular runners and have completed a number of 5k, 10K, and half marathons together and enjoying running on the Green Monster. Dr. Potkanowicz can be found most days, working in his office located in the King Horn Sports Complex, Room 106B. Feel free to stop by.

Department of Human Performance and Sport Sciences

Rosanne Hoersten

Administrative Assistant for HPSS
King Horn Sports Center 219
525 South Main Street
Ada, Ohio 45810
8 a.m.-4:30 p.m.
8 a.m.-4:30 p.m.
8 a.m.-4:30 p.m.
8 a.m.-4:30 p.m.
8 a.m.-4:30 p.m.