- I have been a family physician for over 15 years and everyday I talk to my patients about the importance of regular physical activity. I have been training with Preston for the past 2-1/2 years and he has helped me reach several fitness goals, including completing a 1/2 marathon and cycling an average of over 3000 miles/year-all injury-free! I feel great and fitter than I did 10 years ago. Deborah Glupczynski, MD