Olympic Marathoner Shalane Flanagan Runs 115 Miles a Week Posted Aug 14, 2016 To run 26.6 miles competitively, Olympic runner Shalane Flanagan must log a ton of miles in training for the classic event. “I run 115 miles a week,” Flanagan tells Us Weekly. “I’m running twice a day for 80 minutes in the morning and 40-48 minutes in the evening.” Naturally that amount of running gets exhausting, so the 35-year-old makes sleep a top priority. (Us Weekly)