Health Club
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 that predominantly 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.Most newer health clubs offer group exercise classes that are conducted by certified fitness instructors. Many types of group exercise classes exist, but generally these include classes based on aerobics, cycling (spinning), boxing or martial arts, high intensity training, step, regular and hot (Bikram) yoga, pilates, muscle training, and self-defense classes such as Krav Maga and Brazilian jiu-jitsu. Health clubs with swimming pools often offer aqua aerobics classes. The instructors often must gain certification in order to teach these classes and ensure participant safety.
