There are a variety of different words that can be used as synonyms for the term "exercise bikes". Some common terms include stationary bicycles, indoor bikes, spinning bikes, and cardio machines. Other terms that can be used to describe this type of fitness equipment might include cycling machines, workout bikes, fitness cycles, or even pedal exercisers. No matter which term you use, these pieces of equipment are designed to provide users with a low-impact, high-intensity cardiovascular workout that can help them improve their overall health and fitness levels. So whether you are looking to burn calories, boost your endurance, or simply get in shape, there are plenty of different exercise bikes to choose from that can help you achieve your goals.