By Meredith Cohn / The Bulletin
November 18, 2010
BALTIMORE — Her Asics laced up and her water bottle at her side, Meredith Dobrosielski stepped onto the treadmill for a robust half-hour walk.
For the Towson, Md., runner, this wasn’t just any trip to the gym. The session took place in a lab at Johns Hopkins Bayview Medical....