A stationary bike, also known as an exercise bike or spin bike, is a popular fitness equipment for indoor cycling workouts. There are various synonyms for this equipment, depending on the type of bike and its specifications. For example, a recumbent bike is a type of stationary bike that has a reclined seat for a more comfortable, low-impact workout. Similarly, an upright bike refers to a bike that simulates the experience of riding a traditional bike outdoors. Other synonyms include indoor cycling bike, cardio bike, and fitness bike. Regardless of its name, a stationary bike is a great tool for improving cardiovascular health and toning leg muscles.