The main types of fitness classes available include aerobics, yoga, pilates, and strength training classes. Aerobics focuses on cardiovascular endurance, while yoga emphasizes flexibility and mental wellness. Pilates targets core strength and stability. Other popular formats include HIIT (High-Intensity Interval Training), cycling, and dance-based classes like Zumba. Each class type caters to different fitness levels and preferences, encouraging broad participation. Exploring various classes can help individuals find activities they enjoy, increasing adherence to regular exercise.