George R Biltz, MD

Senior Lecturer, Exercise Physiology
Contact Information


27R - URC
1900 University Avenue S.E.
Minneapolis, 55455


Graduate education faculty

Professional experience
  • 2008-2009. Course Director and Instructor for Kinesiology 3027 - Human Anatomy, University of MN.
  • 2007-2009. Pediatrician, Children’s Emergency Department.
  • 2004-2009. Course Director and Instructor for Kinesiology 3385 - Human Physiology, University of MN.
  • 2002-2003. Minnesota Bush Foundation Medical Fellowship.
  • 1999-2001. Pediatric Sports Medicine Clinic, Children’s Hospital, St. Paul, MN.
  • 1989-1996. Founder and Director, Pediatric Center for Exercise and Nutrition Therapy, HealthPartners Como Clinic, St. Paul, MN.
  • 1979-2007. Pediatrician, HealthPartners Clinics and Urgent Care.
  • 1976-1979. Research Specialist, Department of Pediatrics, University of MN, Minneapolis, MN.
Research support and awards

Reducing Clinical Inertia in Diabetes Care [A03-083]. NIDDK - National Institute of Diabetes & Digestive & Kidney Diseases. PI: Patrick O’Connor. Start Date: 9/1/2004; Duration: 4 years. Clinical inertia, defined as lack of treatment intensification in a patient not at evidence-based goals for glycated hemoglobin (A1c), systolic blood pressure (SBP), or LDL-cholesterol (LDL), is a factor in about 80% of the 40 million office visits made each year by adults with diabetes in the U.S. Clinical inertia is a major obstacle to high quality diabetes care, and contributes too many potentially preventable macrovascular and microvascular complications, premature disability and mortality, and at least $4 billion a year of potentially preventable health care charges in the U.S. In this randomized trial we evaluate two conceptually distinct but potentially synergistic interventions designed to reduce clinical inertia in the outpatient care of adults with type 2 diabetes. Detailed economic analysis will identify short-term direct medical costs related to interventions. Results of this project will have significant clinical and policy implications.

Use of Phoneline Support and an Activity Monitor in Pediatric Weight Control [98-051]. HPRF - HealthPartners Research Foundation. PI: George Biltz. Start Date: 7/1/1998; Duration: 6 months. This study will assess two interventions to aid in control of weight in supraobese adolescents. The Partners for Better Health phoneline has designed a pediatric weight counseling module. Part of the group will periodically use an activity monitor to encourage exercise. This study will determine the effectiveness of these approaches.

Patent applications

Biltz, G., Dutta, P., Johnson, P., O’Connor, P., Rush, W. and Sperl-Hillen, J. Disease Treatment Simulation, U.S: Publication Number: US -2006 – 0292535 - A1 on December 28, 2006.

Professional and personal associations
  • North American Society for Pediatric Exercise Medicine.
  • Board Certified American Board of Pediatrics - 1994, 2001, 2008
  • Sub Specialty Qualification in Sports Medicine - 2001
  • Residency, University of Minnesota, 1979
  • M.D., medicine, University of Minnesota, 1974
  • B.A., biometry, University of Minnesota, 1970

Selected Publications
  1. Biltz GR, Harmon JH, Unnithan VB, Witten G, Dengel DR. RER variability analysis by sample entropy: a preliminary comparison of obese and lean children. In: Jurimae,T., Armstrong, N. and Jurimae, J. eds. Children and Exercise XXIV, Routledge, Taylor and Francis, 2009.

  2. De Beaudrap P, Witten G, Biltz G, Perrier, E. Mechanistic Model of Fuel Selection in the Muscle. J. Theor. Biol. 242: 151-163, 2006.

  3. Biltz, GR. Physical activity, aerobic fitness and causality: reflections from complex adaptive systems. Pediatr. Exerc. Sci. 18:182-192, 2006.

  4. Dutta P, Biltz GR, Johnson PE, Sperl-Hillen JM, Rush WA, Duncan JE, O'Connor PJ. SimCare: A Model for Studying Physician Decision Making Activity. In Advances in Patient Safety: From Research to Implementation. K. Henriksen, J. Battles and E. Marks (eds) Agency for Healthcare Research (AHRQ) 2005; vol 4: 179-192

  5. O'Connor PJ, Sperl-Hillen JM, Johnson PE, Rush WA, Biltz GR. Clinical Inertia and Outpatient Medical Errors. In Advances in Patient Safety: From Research to Implementation. K. Henriksen, J. Battles, D. Lewin, and E. Marks (eds) Agency for Healthcare Research (AHRQ) 2005; vol 2; 293-308

  6. Davis, TF, Biltz, GR. Forming a Multidisciplinary Team. In: Blount, A. ed. Integrated Primary Care. New York: WW Norton: 1998: 228-246.

  7. Biltz, GR., Siegel, J., Davis, T., Pfaffinger, K., Rondeau-Ambrose, T. A biopsychosocial approach to family-based management of obese children. In: Armstrong, N., Kirby, BJ. and Welsman, JR. eds. Children and Exercise XIX, London: E&FN SPON, 1997: 75-80.

Selected Presentations
  1. Biltz, G. Co-presenter, Pediatric Sports Medicine Seminars, University of MN, Department of Pediatrics, 1997-2009.

  2. Nelson, M., Biltz, G., Winsley, A., Roberts, Armstrong, N., Stoedefalke, K., and Dengel, D. Sample Entropy Assessment of Short Term Training on Heart Rate Variability NASPEM poster at Colorado Springs, CO. September, 2008.

  3. Biltz, G., A Functional Approach to Injury Management. Children's Hospitals and Clinics Grand Rounds, March 2008.

  4. Biltz, G., Unnithan, V., Harmon, J., Witten, G. And Dengel, D. RER Variability Analysis by Sample Entropy: A Preliminary Comparison of Obese and Lean Children. Pediatric Work Physiology XXIV International Symposium, Tallinn, Estonia, September, 2007.

  5. Biltz, G., Witten, G., Kaufman, C., Kelly, A. and Dengel, D. RER Variability Analysis in Overweight Children and the Effects of Exercise. NASPEM poster at Charleston, SC. September, 2006.

  6. Biltz, G. Clinical Concerns for the Obese Adolescent Athlete. Minnesota Sports Medicine Conference, April 2006.

  7. Biltz, G. Pediatric Obesity - a Complex Adaptive State, Boynton Health Service, University of MN. March 2004.

  8. Biltz, G., Dutta, P., Tolfrey, K. and Johnson, P. Data Envelopment Analysis: A Contingent Approach to Exercise Effects on Lipoproteins. NASPEM poster at Michigan State University, East Lansing, MI. August 2002.

  9. Biltz, G. Pre-pubescent Power: Weight Training for Kids, Twin-Cities Marathon Sports Medicine Conference, October 2000.

  10. Biltz, G. The Role of Exercise in the Prevention and Treatment of Hyperinsulinemia and Type 2 Diabetes in Pediatrics. Northland Chapter ACSM, Spring Tutorial March 2000.

  11. Biltz, G. Pediatric Obesity: Health Risks, Primary Care Assessment and Interventions. Northland Chapter ACSM, Spring Tutorial, March 2000.

  12. Biltz, G. Physical Inactivity in Youth: Current Problems, Medical Consequence and Primary Care Interventions. National Association Pediatric Nurse Practitioners, MN Chapter, February 2000.

  13. Biltz, G. Physical Training in Adolescents. University of MN Department of Orthopedics and Sports Medicine Center, Spring Sports Medicine Conference. June 1999.

  14. Biltz, G. Promoting Physical Activity and Physical Fitness. Pediatric Grand Rounds Children's Hospitals and Clinics. Minneapolis and St. Paul, MN, July 1998.

  15. Biltz, G, Dutta, P., Verma, D., Johnson, P. Data Envelopment Analysis: An Approach to Pediatric Obesity Management. NASPEM poster at University of Massachusetts, Amherst, MA. August, 1998.

  16. Biltz, G. Challenges in the Assessment and Treatment of Childhood and Adolescent Obesity. Childhood and Adolescent Obesity: Prevention and Intervention, University of Minnesota, Minneapolis, MN, May 1997.

  17. Biltz, G. A Biopsychosocial Approach to Family-based Management of Obese Children. Pediatric Work Physiology XIX. International Symposium, Exeter, England, September 1997.