A spinning bike, also known as an indoor cycling bike, is a stationary exercise bike designed to simulate outdoor cycling. It typically consists of a heavy flywheel, adjustable resistance, and a comfortable seat and handlebars. Spinning bikes are often used in group fitness classes or for individual workouts at home. They provide a low-impact cardiovascular workout that can improve endurance, burn calories, and strengthen leg muscles. The adjustable resistance allows users to increase or decrease the intensity of their workout, mimicking the experience of riding on different terrains. The heavy flywheel provides a smooth and realistic cycling motion. Many spinning bikes also come with features such as built-in monitors to track distance, speed, time, and calories burned. Some models may also have additional features like heart rate monitors or pre-programmed workout routines. Overall, spinning bikes are a popular choice for indoor cycling workouts due to their effectiveness, convenience, and ability to provide a challenging and engaging workout experience.