Aerobics is a form of exercise that combines cardiovascular exercise, strength training, and stretching to improve overall fitness. There are many types of aerobics including low-impact, water aerobics, step aerobics, and dance aerobics. The document discusses a research study where the author observed a dance aerobics class, interviewing participants about the class. The class involved a 30 minute warm up and two exercise sessions totaling 90 minutes. Seventeen people participated, most being middle-aged women. The author concluded that aerobics classes provide a good workout and social benefits, changing their view that it was not as challenging as other athletic activities.