 A cardio theater or cardio area includes many types of cardiovascular training-related equipment such as rowing machines, stationary exercise bikes, elliptical trainers and treadmills.These areas often include a number of audio-visual displays, often TVs (either integrated into the equipment or placed on walls around the area itself) in order to keep exercisers entertained during long cardio workout sessions.Some gyms provide newspapers and magazines for users of the cardio theatre to read while working out.