This Saturday as an estimated 23,000 runners from all 50 states and 17 countries will take over Charm City for the 18th annual Baltimore Running Festival. 5,000 entrants are slated to run the 5k; 10,000 will take on the half marathon; and 4,000 runners have set their ambitions on conquering the 26.2 mile full marathon. Dr. Miho Tanaka joins Tom today in Studio A to answer your fitness questions and share tips on conditioning and avoiding injuries during the big race, or while partaking in whatever physical activity you like to do. The conversation is being live-streamed on WYPR's Facebook page.Dr. Tanaka is an orthopedic surgeon and the Director of the Women’s Sports Medicine Program at Johns Hopkins Hospital. She was the team physician for the St. Louis Cardinals and the St Louis Surge for a while. She also served as assistant team physician for the NY Liberty in the WNBA, and currently serves as a team physician for US Soccer.