Exercise bikes are stationary bicycles designed for indoor cycling workouts. They provide a convenient way to engage in cardiovascular exercise without needing to go outside. Users can adjust the resistance levels to increase or decrease the intensity of their workout, making them suitable for all fitness levels. These bikes come in various styles, including upright and recumbent models. Upright bikes resemble traditional bicycles, while recumbent bikes offer a more relaxed seating position, providing back support. Many exercise bikes also feature built-in monitors to track metrics like speed, distance, and calories burned, enhancing the workout experience.