A health club (also known as a fitness club, fitness center, and commonly referred to as a gym) is a place which houses exercise equipment for the purpose of physical exercise.

Most health clubs have a main workout area, which primarily consists of free weights including dumbbells, barbells and exercise machines. This area often includes mirrors so that exercisers can monitor and maintain correct posture during their workout.

A gym which predominately or exclusively consists of free weights (dumbbells and barbells), as opposed to exercise machines, is sometimes referred to as a black-iron gym, after the traditional color of weight plates.

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 (either integrated into the equipment, or placed on walls around the area itself) in order to keep exercisers entertained during long cardio workout sessions.