NRG Gym Sheffield in Central Sheffield | Facilities, hours... NRG Gym Sheffield is a gym in Central Sheffield, offering gym and fitness facilities, strength and cardio training, membership enquiries. Address: 2-16 Carlisle St, Sheffield S4 7LJOfficial website Things to do today Things to do tomorrow This weekend Free events Family events Kids activities in Sheffield Live music in Sheffield Live sports in Sheffield Cinemas in Sheffield Gyms in Sheffield All Sheffield events