Fitness classes refer to a group exercise or workout led by an instructor, designed to improve physical fitness and overall health. These classes can include various types of exercises such as aerobics, yoga, Pilates, spinning, weightlifting, and many others. The goal is usually to help participants build strength, endurance, flexibility, balance, and coordination through a combination of cardiovascular exercise, resistance training, and stretching techniques. Fitness classes are often offered at gyms, health clubs or community centers, and can be tailored to different fitness levels, from beginners to advanced athletes. Participants typically sign up for these classes on a regular basis in order to maintain their physical fitness and see progress over time.