One of the risk factors for falls is the lack of exercise. Why not consider joining Club 300, Maryland-National Capital Parks and Planning Commission's summer senior walking program. The program will "virtually" take you from Ocean City to Cumberland, and you can earn rewards along the way. Three hundred represents the mileage from Ocean City to Cumberland. Any Prince George's County senior, age 60 and better, or pre-senior, age 50 to 59, of any fitness level, is welcome to join Club 300. Registration has begun, with walking officially starting at Senior Health and Fitness Day, Wed, May 21 and concluding Friday, Sept. 19. Once registered, you can walk anywhere, any time, with anyone you choose. Register at the Laurel-Beltsville Senior Activity Center, 7120 Contee Road or online, pgparks.com/Club300.htm..