121 Fitness in Barking and Dagenham | Facilities, hours &... 121 Fitness is a gym in Barking and Dagenham, offering gym and fitness facilities, strength and cardio training, membership enquiries. Address: 141 Becontree Ave, Dagenham RM8 2ULOfficial website Things to do today Things to do tomorrow This weekend Free events Family events Kids activities in London Live music in London Live sports in London Cinemas in London Gyms in London All London events